KOMATSU Excavator from Malaysia

[izzzul]

Hello from Malaysia

Hi everyone!

My name is Azizul, and i've been visiting this webpage so often, as I'm a RC maniac too. Been reading a lot as to learn and understand all the tricks and lesson learnt from all of experts here.

About myself, working as an Engineering in a SEMICON facility here, but really fall in love in RC, specially Construction equipments..EXCAVATOR.

Not sure how to start and make post as to intro about my RC works, but i've create a BLOG as to keep all my pictures, happy viewing and comment there.

http://my-rc-page.blogspot.com/

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Re: Hello from Malaysia

Welcome Azizul we are glad to have you here. I went and checked out your blog and those are some nice machines you are working on.

Travis


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Re: Hello from Malaysia

Your constr equip model construction shows great promise Azizul.

Per your excavator: your track drives look weak for such a heavy model of 40kg. At the very least you should have bigger bevel gears for greater gear surface mesh, the track sprocket drive axle should be housed within a cubed dimension for support on two points and both bevel gears properly shimmed to prevent seperating from each other.

And may I also recommend that you do not exceed 25bar to keep your hydraulic system intact. If you find your hyd power lacking, increase of your cylinder bore is much safer than higher pressure.

http://4.bp.blogspot.com/-f-hE7OL2HDk/TwevhHcea_I/AAAAAAAAAE8/gYAm38WCqfg/s640/12102011_4.jpg

For me to post one your pictures here, (using Windows PC) I merely right click on picture, click properties, copy url & paste here in this forum using the image code [img] your pic url [/img Quote my post to see to see the link code fully.

Please feel free to start a thread of your const equip creations in this forum http://www.rctruckandconstruction.co...isplay.php?f=6

Lil Giants


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Re: Hello from Malaysia

Welcome aboard! Neat project's.

Doodlebug

[izzzul]

Thanks everyone, glad that you accepted me to join this page..

Lil,
I have the same fear, tested on the flat floor in the house shows no sign of sweat at all, see below:

http://www.youtube.com/watch?v=Y6DSmQBOrdk

But when we tested them on extreme surface, the gear is breaking apart, no problem to the motor, but gear is a total damage... at this point my excavator total weight is about 90% of full weight, see pic below:
http://2.bp.blogspot.com/-Gq5PrNelnr8/Twevtq9TfaI/AAAAAAAAAFc/sQun630zYwM/s1600/18122011.jpg

Per your advice, i should go with bigger and better strength bewel gears, had ordered a some for testing this week. we are using TRUCK PULLER, LRP 5A BEC

As for hyd powerplant..if you notice, i'm using industrial hyd pump, attached to powerful brushless motor, spec for 100bar max!!, but tested to 17bar with no issues/leaking, using teflon seals, nilon pipes. My only prob is control valves, anyone has some advice how i can improve them?

Prob is servo kindda stuck and slow respond/fluid speed, any better design that we can try..? will upload the valve pic later..

[Lil Giants]

I don't know how to draw in CAD to clearly explain my thoughts. This is the site where I obtained my John Deere 850 excavator, which is about the same size as what you are building.

You could either use these pictures as a guidline to improve your own track drives or inquire from Vario if they have a track drive component kit to sell to you?

http://www.vario-earthmovers.com/baubericht/hitachi-zaxis-870-teil-2.html
http://www.vario-earthmovers.com/baubericht/hitachi-zaxis-870-teil-3.html
http://www.vario-earthmovers.com/baubericht/hitachi-zaxis-870-teil-5.html


The servo automated rotary valves they use in their models work excellent too.

http://www.vario-earthmovers.com/baubericht/hitachi-zaxis-870-teil-10.html


Though your pump may be capable of producing 100bar, other components may rupture causing very serious injury. What are the limits of the nylon hose you use? You do have a pressure relief valve built into the system, correct? Safety first! :)

[ihbuilder]

welcome Izzzol your excavators look great . with a little beefing up of the drive you should have some fine working models :) 2 things I notice I like to find the surce of : 1) the pump and 2) the double pitch attachment chain . Looking forword to updates :D

Steve

[izzzul]

welcome Izzzol your excavators look great . with a little beefing up of the drive you should have some fine working models :) 2 things I notice I like to find the surce of : 1) the pump and 2) the double pitch attachment chain . Looking forword to updates :D

Steve

Thx Steve..pump is industrial type ones, commonly used for hyd machines, will get more details to send you in couple days...
chain bracket..i can source this locally, quite cheap stuff, not sure whether it sell elsewhere..looking for some old pictures to share here, later..

Azizul

[izzzul]

Hi Joe,
I admire your dedication and work ethic here. Thx for giving a great advice regarding my own build KOMATSU Excavator.. If you notice, i'm making quite a big one, boom arm stretches a little over 1 meter...and it gonna be heavy.
http://4.bp.blogspot.com/-crEMePkw9iI/TwevraJ0QgI/AAAAAAAAAFU/TczbLin4xNI/s1600/20111210_122333.jpg
The track shoe looks akward (see pic below) as the chain links are pretty big in size, cannot find smaller ones..unlike yours below:
http://img.photobucket.com/albums/v150/protrker/Jan%201%202011/IMG_0498.jpg

Why i dont buy ready made excavator?
1) Dont have money that much..
2) Dont like their support..
3) I want to learn from scratch...build one on my own..like it..
4) I wanna make it bigger in size and more powerful hopefully can beat Germans.. sigh...!

As for hyd powerplant, tested WEDICO parts from GoldenTrucking but not satisfied (not realiable, leaking and inssuficent power..see pic:
http://4.bp.blogspot.com/-yQ3Hkx5zXGk/Tww70cwG7SI/AAAAAAAAAKg/XK8iLrhWzq4/s640/Hydvalve.jpg

I'm using industrial parts now, hyd pump and control valve below:
http://2.bp.blogspot.com/-K68rxClh7Bo/TwxAHDrnyRI/AAAAAAAAAKo/N-zLIx4e_nU/s640/Pump.jpg

New control valve (industrial type too):
http://1.bp.blogspot.com/-mQHY2-QfeRk/TwwR6Wh6i4I/AAAAAAAAAKQ/GbxNgCqNs48/s640/10012012.jpg

Today we tested this newly receive control valve and at just below 10bar, we can lift the entire boom arm and can hold steady...it was tight and no leak....all safety precautions has been taken care off, so it's safe i think.. will grab video later this week and share with you and the rest...what do you think...10bar or 20bar is sufficient for my size excavator..?
http://3.bp.blogspot.com/-GiirBzPrvd4/TwwU-YSdQAI/AAAAAAAAAKY/qDhIOpW7kW0/s640/10012012_2.jpg

The new gears for the track will show up later this week, will test that one too..i like the German's one, like the one on your 850D model..will see if it work or i have to make similar mod...

Hope you have time to read my story, thx..

[kcjeepn]

That is some nice serious work.

[RCP57]

I really like this build. Our machines are similar in size and we're at about the same point in our builds. Like you I also don't have the money to buy a kit but to be honest if I had the money I would buy more shop machinery and scratch build it anyway.

Keep the pictures and info coming!

Reg

[izzzul]

I really like this build. Our machines are similar in size and we're at about the same point in our builds. Like you I also don't have the money to buy a kit but to be honest if I had the money I would buy more shop machinery and scratch build it anyway.

Keep the pictures and info coming!

Reg

Hi Reg,
I wonder how's your project progress, love to see your superb touch on those Al sheet, very neat and perfectly details.. do you mind to share yours too? i'd like to see the final looks.. how about your hyd system doing?

Azizul

[Lil Giants]

It's cheaper for me to buy than scratchbuild... I live in a rather remote area with no access to materials, machines, custom cnc, ect. Everything would have to be mail order. I do enough fixing, head scratching, macguyvering on farm machinery nearly everyday that I prefer my hobby to be a ready made assembly that I can sit down and enjoy at the flip of a switch. :)

Per my JD850, it's 1.4m from pivot point to tip of bucket at its furtherest reach. Weighs about 39kg (86lbs). Hydraulic pressure set to 25bar with 20mm diameter cylinders.

The valves you show in the above photo are made by Leimbach for wedico, the same hydraulic system as my smaller Stahl constr equip.
http://www.leimbach-modellbau.de/start.html

What you have there now for valves is humungous, way more flow than what you need. It'll probably take 1/4 scale servos to operate them, the type of servos used in sail boats.

Anyways, on my way out the door right now, going on a short holiday for a week. Talk more later. :)

[Rebekah_harper]

hiya,

thought I'd share this link should you not have found it. I use parts books for inspiration and so far it's help me alot to develop parts. hope it helps

www.komatsupartsbook.com/

:cool:

[izzzul]

hiya,

thought I'd share this link should you not have found it. I use parts books for inspiration and so far it's help me alot to develop parts. hope it helps

www.komatsupartsbook.com/

:cool:

wow..! nice, thanks a lot for sharing..this is great info

[Rebekah_harper]

I wish there was something similar for liebherr as I am building one for someone (thread on here)

but I got the design for the slew joint from there so that I can power the tracks hydraulically.
rams and pump are coming from Damitz the Hydraulic motors I am going to make my self along with the control valves.

I love your build
was wondering what scale you were building to as I am working on 1/14 to fit in with trucks and the reach is about the same.

look forward to seeing more.

[izzzul]

track hyd?? wow, this is something that i was trying to figure out how...So we can get rid off motors gearing ..

my build is meant for 1:12 scale, the PC650 is among they extra big size excavator, so i notice that it's actually bigger if you compare the std series excavator..i'll make tip to tip measurement later..

our hyd system is ready, so does the new gears for the track system, and will snape video for hyd endurance test this sunday, will share some when ready..

[pumptech]

Amazing work you have done on this so far!! ,look forward to seeing more of this,keep the pics coming:)

[carp]

Very nice, just had a look at your blog and its impressive to see it lift, looks like your using a 1cc gear pump? have you worked out how to move your valve block with servos yet?

[izzzul]

Very nice, just had a look at your blog and its impressive to see it lift, looks like your using a 1cc gear pump? have you worked out how to move your valve block with servos yet?

it's 1.2cc..and my actual cylinder actually bigger diameter size (and more force/power of course), rated to 35bar instead of 15bar on mock up unit below..it can lift 7.8KG (17lbs) with no sweat, hope everything is ok when upgrade to new SMC cylinders, now waiting for mod bracket for the linear servos..

http://3.bp.blogspot.com/-MCbO9cBomQ0/TxKG-L8WNvI/AAAAAAAAAMY/iZii4yz16Q0/s640/DSC07630.jpg

[izzzul]

this is the video for the lift test of 7.8KG or 17lbs load ..using smaller rated cylinder (capped at 15bar) on our test/mock up unit..this is sufficient i think, moreover, i'm going for better cylinder (SMC Japan) which can max up to 30bar...to match with the pump which currently producing steady 25bar right now...

Linear servo will come later...anyone already tried this before? pls guide me..

http://www.youtube.com/watch?v=h_gCTdpeIPs

[carp]

it's 1.2cc..and my actual cylinder actually bigger diameter size (and more force/power of course), rated to 35bar instead of 15bar on mock up unit below..it can lift 7.8KG (17lbs) with no sweat, hope everything is ok when upgrade to new SMC cylinders, now waiting for mod bracket for the linear servos..


i thought it would be something like that, i saw them on ebay the other night, cheap price for a hydraulic pump, can you share some info on what motor you are using to turn the pump and how they are connected? when you say linear servo do you mean linear actuator?

[Espeefan]

Wow, what a beast of an excavator! It's huge, and looks like it could dig all the way to the other side of the world.

[D8R]

About valves, it looks huge. Have you concidered other valves like HAWE? They have different sizes:

www.hawe.de/us/products/produ...-spool-valves/

I have serie 1 for the blade and ripper control (4 functions) and serie 2 for running (one each to hydraulic motor).

Dan

[izzzul]

About valves, it looks huge. Have you concidered other valves like HAWE? They have different sizes:

www.hawe.de/us/products/produ...-spool-valves/

I have serie 1 for the blade and ripper control (4 functions) and serie 2 for running (one each to hydraulic motor).

Dan

Wow, it looks neat Dan. I hv prob to find the best part here locally, finding elsewhere would cost me more, the parts plus a bit for shipping and what if it now to my satisfaction.., so i turned to industrial equipments....a bit higher on rating, but i'll have room for upgrade/improvement in future (i hope).. the valve block plus the servo/actuator arm is still within the main cab height, that a big relief actually..

afterall, mostly all parts are ready item on shelves, so in case of breakdown or upgrade, i just need to swap the kits..re-print the metal parts at machine shop..or build some for my group mmber

[izzzul]

Hi all,
just came back from long holiday (Chienese New Year)..everybody here enjoyed 1 week off...nice to be out of work...

Started doing some final touch on the hydraulic system, below is pic of our stock control valve, bracket for servo unit will come later this week I hope, will be a std metal geared servo, testing 7kg and 14kg max stroke capacity...more than enough to operate the valves i think.. the spring assembly at bottom picture will be removed as the servo will be self-centered to neutralize the valve control..putting the system into idle...also making the whole assembly a bit smaller...

http://1.bp.blogspot.com/-_vSfPi6qS6o/TySdU_R5tBI/AAAAAAAAANQ/t61pcbGzwLY/s1600/DSC_0459.jpg

Also some final cosmetic touch up on Hyd lines to avoind excessive bends or over-travel
http://4.bp.blogspot.com/-Z79fAqDToNk/TySbTqyC1uI/AAAAAAAAANI/fJR0BFrTJTM/s1600/DSC_0458.jpg

You can also see more at my webpage below:
http://my-rc-page.blogspot.com/p/komatsu-excavator.html

[mazdaparts]

Very nice work on this huge machine. From watching the undercarriage videos it looks as if you don't have any type of tension on the tracks. Is this something you think will be a problem in the future or do you have other plans?

[izzzul]

Very nice work on this huge machine. From watching the undercarriage videos it looks as if you don't have any type of tension on the tracks. Is this something you think will be a problem in the future or do you have other plans?

oh! that should not be a big problem for me...maybe later i can change to bigger/higher spring tension as to improve this..good catch

[carp]

Looking good! what diameter are your cylinders? and what size are your hoses?

[izzzul]

Looking good! what diameter are your cylinders? and what size are your hoses?

Carp,
It's 20mm bore size cylinders (35Bar Max) with 1/4" Nilon hoses..
Refer this link (http://www.smcworld.com/2008/e/webcatalog/docs/hydraulic/cylinder/CHM.pdf)

Azizul

[Jigglepin]

That is an amazing piece of machinery you have there :eek: that would be useful in a landscaping project! :D

[izzzul]

The CNY holiday is longer than i thought...many shops and supplier still close and not much of progress for last 2 weeks..here are some final re-arrangement of main cabin and final touch..(cabin cover will be ready soon..).
http://1.bp.blogspot.com/-mknGqv-dqOA/TzHjkgrUHII/AAAAAAAAAOE/M6I5udifuNo/s640/DSC_0483.jpg
The 4mm X 6mm nilon hoses are now taking shape on the top of main boom, with one piece bracket holding them togather..
http://3.bp.blogspot.com/-xSx9P6Pi1vc/TzHjo3Ga0PI/AAAAAAAAAOM/hE3e-Yjax5Y/s1600/DSC_0488.jpg
Main hyd cylinder are now been installed with the right ones (CHMC 20-125)..plus the nilon bracket holder at the bottom base plate to hold all 4 lines for the main boom arm.
http://3.bp.blogspot.com/-j9zHG_l2cYo/TzHjvD7rroI/AAAAAAAAAOU/NwMMVyFuCRY/s1600/DSC_0482.jpg
Main control valve is now at final location, compact and neat arrangement, pls note the Al bracket to hold all the servos to control the spool valve for the arm..take note the main battery and hyd oil reservoir are line up at back of the main cabin.
http://1.bp.blogspot.com/-zSEWfM8yrng/TzHl3_aH-RI/AAAAAAAAAOc/N8-pqi33HCg/s1600/DSC_0481.jpg
Control arm attached to spool arm of the hyd control valve...metal servo, 15kg

Same progress you can see here (http://my-rc-page.blogspot.com/p/komatsu-excavator.html)

[izzzul]

Sneak preview of the main cabin..more details will come..
http://4.bp.blogspot.com/-VX-uRU-rZIk/Tz5XUWxpxWI/AAAAAAAAAOs/yun4nmIEvyA/s640/RCEX_MARK01_CABIN01_view_a.jpg
http://3.bp.blogspot.com/-HLyyOfhSrvk/Tz5XW28xw2I/AAAAAAAAAO0/-Khdbiahemg/s640/RCEX_MARK01_CABIN01_view_c.jpg
http://3.bp.blogspot.com/-j2gYTjUX2Wk/Tz5XctGzGYI/AAAAAAAAAPE/CD6b-n3GDDk/s640/RCEX_MARK01_CABIN01_view_b.jpg

[izzzul]

And now, moment of truth...all system in place, time for full hyd test...see video below.
http://www.youtube.com/watch?v=6yisNP1oMhE
So satisfying as all functions are running per my expectation, the hyd movement should be smoother as we exercising this unit more often, as the o-rings and seals are yet to be fully intact/seasoned. Main cabin cover is now under final touch up on powder coating while second excavator unit is going to be ready fast..Pls note, the digging park is just a small end corner of a flatbed lorry, not much space here...still it runs ok....need more sand here.!! Looks shakky a bit due to poor terrain condition/stiff slop and cabin counter-balance weight is yet to install at the back of the main cabin...should be dead stable...this 50kg monster...I hope

Pls comment my dear master, i need input here to improve further, if any..
Below is my customized radio, can do up to 10channels...4 sticks, 2.4GHz!
http://1.bp.blogspot.com/-XA6yIQrgzyA/T3h3-UnWxoI/AAAAAAAAARg/JzAxuu_ha6k/s640/DSC_0710.jpg
Check my blog as well for more pictures..
http://my-rc-page.blogspot.com/p/komatsu-excavator.html

[ihbuilder]

sweet radio ;) is it 2 5 channel ? It looks like what I've been thinking will work :D

[izzzul]

sweet radio ;) is it 2 5 channel ? It looks like what I've been thinking will work :D

You are right, i think of no other way to mimic real machine does, so i'd combined 2 6Ch 2.4GHz radio...it's 12Ch then now i realized...few other function and switches that i can add on....thumb knob wheel drive on top left is actually controlling the engine throttle (aka motor for the hyd pump) which i can start/stop or increase/decrease independently..running at 15 to 25bar now.

i hate to see it without the main cabin cover, 1 week or so to be ready..while second unit is coming on very fast..exact carbon copy of this one...so i'll have partner to play it now...plus the VOLVO dumper truck..

[Valdosetti]

Hi Azizul! My name is Setti and I`m new on the forun. Your machine is amazing!. I`ve been looking for more than 3 years so far on all web sites and I haven`t seen any model like yours. It`s truly amazing! I did biuld my own excavator a year ago but now I dont even want to see it anymore. It became too slow with wdc pump and valves. Would you please tell me where you bought your control valve, hydraulic pump and motor? I love the combination, it looks just like my real excavator on high speed. Great job and enjoy!!!

[doodlebug]

Nice portable sand box! Look's like it run's alot smoother now.

Cheer's, Neil.

[izzzul]

Hi Azizul! My name is Setti and I`m new on the forun. Your machine is amazing!. I`ve been looking for more than 3 years so far on all web sites and I haven`t seen any model like yours. It`s truly amazing! I did biuld my own excavator a year ago but now I dont even want to see it anymore. It became too slow with wdc pump and valves. Would you please tell me where you bought your control valve, hydraulic pump and motor? I love the combination, it looks just like my real excavator on high speed. Great job and enjoy!!!

Hi Setti,
My mc is not that great compared to some others here, still newbie here too. Like everybody else, it's all about patience and determination i guess..my parts are locally sourced, they all are industrial/machinery/gadgets , some info that i put on my blogspot are the true direct OEM/regional distributor, or you can Google them to order. If you want me to order these for you, send me a private msg for the details what you want, i'll order/courier some for you. Besides, i'd already ordered another set for second excavator build, thx

[carp]

nice work, it seems to be working very well with that industrial valve block in there, what sort of run times are you getting with it?

[izzzul]

nice work, it seems to be working very well with that industrial valve block in there, what sort of run times are you getting with it?

Not sure if i understand you perfectly, on the clock, we hv been testing the hyd for about 3-4 hrs since the build, so it should be running smoother when the spool valve/seals/cylinders is 'soften/seasoned' i think, need more time to play with it, still got other build coming along too, limited time..this valve is used in small hyd machinery like small size forklift and mechanical assist tooling. it's reliable of course (big and heavy build block).. plan to boost up the pressure using 1.4 or 1.6cc hdy pump, same is size, just ratio-ing different.

[doodlebug]

Not sure if i understand you perfectly, on the clock, we hv been testing the hyd for about 3-4 hrs since the build, so it should be running smoother when the spool valve/seals/cylinders is 'soften/seasoned' i think, need more time to play with it, still got other build coming along too, limited time..this valve is used in small hyd machinery like small size forklift and mechanical assist tooling. it's reliable of course (big and heavy build block).. plan to boost up the pressure using 1.4 or 1.6cc hdy pump, same is size, just ratio-ing different.

He's wondering how long the battery last's, before recharching?

Cheer's, Neil

[izzzul]

Oh!, according to supplier, it should last 30mins++, but yet to fully test it, kindda think about 20mins++ depending on your work loading/running style, let me test and confirm first. Fyi, i'm splitting the battery load by 2, that's why i'll hv 2 batteries, bigger one for hyd functions while the smaller one for undercarriage tasks. It should last longer i hope.
http://4.bp.blogspot.com/-yvvUtROqYPw/T2W7luDUVHI/AAAAAAAAAPo/Uun9mNKn6MM/s640/DSC_0582.jpg
And I also planning to put 12VDC inlet power jack/port at back cover for DC cable to connect to a household transformer, so no need to worry about run time out, as you'll have continuous supply. it may not be that cool with the cable dangling around at the back, but i think it worth the fun, what do you think..?

[Valdosetti]

Hello Azizul! Thanks for the reply and I'll be in touch with you soon I just need to find out how to send private mesage first...:confused: I need a little time to get used to the forum that's all. About the pressure, you shoud consider that any over pressure is waste as you'll put you equipment components fighting against each other. You will end up wasting lots of anergy that you dont have to. About you trying bigger pump, I believe you already have a beast in there, make sure your lines have the capacity for that much flow+ you dont want The excavator to be too fast, it wont look good, just like mine is too slow.

[doodlebug]

Thank's for the reply:D There are alot of full sized machine's with
"extension cord's" If it make's the run time and enjoyment "more better":cool:
Go for it!

Cheer's, Neil.

[izzzul]

Very soon, this will be my main cabin...pending powder coating and final decal...
http://4.bp.blogspot.com/-VX-uRU-rZIk/Tz5XUWxpxWI/AAAAAAAAAOs/yun4nmIEvyA/s640/RCEX_MARK01_CABIN01_view_a.jpg
http://4.bp.blogspot.com/-y9xZOrWATIA/T3xWXYPHniI/AAAAAAAAAR4/1ZGubViGU0U/s640/20120404_132603.jpg
http://3.bp.blogspot.com/-HLyyOfhSrvk/Tz5XW28xw2I/AAAAAAAAAO0/-Khdbiahemg/s640/RCEX_MARK01_CABIN01_view_c.jpg
http://1.bp.blogspot.com/-zWVWu-sHzW8/T3xWbmvRwyI/AAAAAAAAASI/GJaHRg1iCzs/s640/20120404_132630.jpg

[izzzul]

Hello Azizul! Thanks for the reply and I'll be in touch with you soon I just need to find out how to send private mesage first...:confused: I need a little time to get used to the forum that's all. About the pressure, you shoud consider that any over pressure is waste as you'll put you equipment components fighting against each other. You will end up wasting lots of anergy that you dont have to. About you trying bigger pump, I believe you already have a beast in there, make sure your lines have the capacity for that much flow+ you dont want The excavator to be too fast, it wont look good, just like mine is too slow.

Setti,
If not mistaken, my industrial valve block allows me to auto divert/auto cut the hyd overpressure as there is a neutral line with-in the valve block itself that function to safeguard the valve, normally <5bar pressure only when any/all cylinders are in idle/holding state, without losing its position . And I make full control of throttle valve/aka hyd pump motor as to suit different force/job level....aka the speed for the movement..hope everything is fine with my design..

PS: I'm using 6mm X 4mm nylon tube for hyd lines, with gasket fitted compression screw nuts.

[Valdosetti]

Wow! every day I like it more and more!! Thanks for let me know about the overpressure valve, I was worrying about the "overpower" and your safety.

[izzzul]

pic of main cabin with some other details (step ladder and side railing)
http://1.bp.blogspot.com/-4r65PiZg3NY/T34i_dZUWMI/AAAAAAAAATo/ucMir2Il5YE/s640/20120405_143459.jpg
complete with exhaust pipe and hooks for the counter weight..
http://1.bp.blogspot.com/-5xOMN0-HG6E/T34jDOjPi3I/AAAAAAAAATw/cHPYXa2Sm7M/s1600/20120405_143521.jpg
Cabin length is about 20-22inches..
http://2.bp.blogspot.com/-e8LtaX83Rhg/T34jHCvodwI/AAAAAAAAAT4/2Q4sjOZRd-8/s1600/20120405_144034.jpg
And this is the real ones, will copy exact the DECALs and details as much as possible..
http://3.bp.blogspot.com/-4oOjr5r9gVI/T34lzeTqSII/AAAAAAAAAUA/CJfQM256qDw/s1600/PC650.jpg

[Lil Giants]

Looking good Azizul, great to see you making progress on this once again. :cool:

Your home built radio looks interesting, but there's something to be said for the new computer radios & their ability for fine tuning, especially the hyds! Looking at your video, can you feather the stick movement so the arms/bucket move a little slower - smoothly?

[izzzul]

Looking good Azizul, great to see you making progress on this once again. :cool:

Your home built radio looks interesting, but there's something to be said for the new computer radios & their ability for fine tuning, especially the hyds! Looking at your video, can you feather the stick movement so the arms/bucket move a little slower - smoothly?

Thx Joe, my radios are cheap ones (yet to use the programmable one), so i've to mod my servo linkages as to get the best slowest swing of the servo horn. At same time, there's extension to my radio sticks as to double the length, thus reducing the swing. That will help to smoothen the hyd flow also. Need to master my skill to handle this beast.. give me a little more time to test..

Btw, your video is superb! brilliant work and achievement. like it so much, i'll follow later.:o

[Valdosetti]

Hello Izizul! I found this micro hydraulic motors and came to my mind that you should take a look... With the pump that you have you could use them to power the tracks hydraulically
http://hydroleduc.com/en/microhydraulics

[Valdosetti]

I forgot to say, they're really small but powerfull;:D

[cielo1889]

speechless, thats huge and insane build.

[izzzul]

Hello Izizul! I found this micro hydraulic motors and came to my mind that you should take a look... With the pump that you have you could use them to power the tracks hydraulically
http://hydroleduc.com/en/microhydraulics

Thx, I've been looking at this style of hyd motor months already, I'd sent them some inquiry about my system and waiting for their recommendation. Wait and see if the can suit my req, love to have it.

Rgds,
Azizul.

[izzzul]

this is the first picture when the main cabin meets the rest of its friends..yet to put all the decals...
http://3.bp.blogspot.com/-ZRlYx749xwY/T4Q1xea6dwI/AAAAAAAAAUs/CMFMFYlk4Tc/s640/09042012_2.jpg
while the second unit is coming fast...pls note i'd colored the track shoe to black as to mimic the real ones..
http://3.bp.blogspot.com/-VwXL0U6mSDQ/T4Q10BoVtKI/AAAAAAAAAU0/IlxyPiWepP4/s640/10042012.jpg

[Valdosetti]

Well done!!!! Is the second one the one for me!!!! :D:D:D
Izizul, I spoke with the company that makes the micro hydraulic motor that I told you and they're insane! They only sell 5 at the time and the price is US 5'000.00 each!!!! :eek:.
Do you know any one that has it for reasonable price? Thanks! Setti

[tootall]

That is thing is hugh. Looks like it would move alot dirt. I really like it

[izzzul]

Well done!!!! Is the second one the one for me!!!! :D:D:D
Izizul, I spoke with the company that makes the micro hydraulic motor that I told you and they're insane! They only sell 5 at the time and the price is US 5'000.00 each!!!! :eek:.
Do you know any one that has it for reasonable price? Thanks! Setti

Hi, it's very expensive indeed..:confused:!! more than half of my entire cost of this build :eek: I'll still looking the industrial hyd motor, but so far it's huge, yet to find the small one. Will let you know...meantime..it's for me to get use to the controls..never operate the real ones..so need time here..will snap more video later..

[izzzul]

That is thing is hugh. Looks like it would move alot dirt. I really like it

Hi there, not so sure how big it is because i dont have one to compare with, but compared to DEERE JD850 (scale 1:14), mine KOMATSU PC650 is 1:10 scale, will be slightly bigger in think, I myself make my own comparison based on what on the website:
http://4.bp.blogspot.com/-EXz9OO_8GG0/T4TS1fG_S5I/AAAAAAAAAVM/uBKiJgtx6qM/s640/Vario+vs+Mine.JPG
You can further check my blog here (http://my-rc-page.blogspot.com/p/komatsu-excavator.html) as i keep all the pictures and progress there (http://my-rc-page.blogspot.com)

[AzItalian]

hi...how much you think will cost u to built it your self,i want one too

[izzzul]

hi...how much you think will cost u to built it your self,i want one too

erm..i've lost tracking of the cost by now, i can say between USD6-8k maybe..not sure how to compare to the market, because mine is customized using industrial gadgets like the hyd pump, valve, hose + RX/TX/Batteries..sorry dun hv exact figure for you..good luck to you..dont forget to share pic too..

[izzzul]

I dont have much update right now except spending time on 2nd excavator, all bodyworks is done and now waiting for electronics parts. Refer below.
http://2.bp.blogspot.com/-qxsUFsru2vA/T6FC9Am8WWI/AAAAAAAAAWk/U4AciTH5Bjk/s640/29042012.jpg
And below is second video shootout, still in the middle of mastering the stick moves, need more time here definately..!
http://www.youtube.com/watch?feature=player_embedded&v=l_KA10X4dl4

And my next project will be my favorite dump truck, it's a KOMATSU KAC960E below, will start a new thread when the project kicks in later, right now still on drawing papers
http://1.bp.blogspot.com/-BzZnSD_Jz-0/T6JkIsHUXxI/AAAAAAAAAXY/zFMgVR3NESI/s640/KOMATSU+KAC960E.bmp
http://4.bp.blogspot.com/-iZxL1YJ-Ojg/T6JkLKfXiBI/AAAAAAAAAXg/UlNwdyyfCYg/s640/KAC960E.bmp

Refer my blog for more pictures
http://my-rc-page.blogspot.com/

[FlyingBeagle]

Wow, that thing will be huge. What would the scale dimensions be on that dump truck? Your excavator is an incredible piece of equipment. Thanks for sharing.

[sparkycuda]

When you do the 960E truck, the drive line can be very prototypical - a traction motor in each rear wheel assembly and electrically driven! That will be one large toy. What do you have in mind for getting tires? I've looked at doing a Komatsu HD785 truck (100 ton) in 1/14 scale, but have not found any tires that are close to diameter/width combination. Anyway, enjoying the excavator build and looking forward to the truck.

Ken

[izzzul]

Wow, that thing will be huge. What would the scale dimensions be on that dump truck? Your excavator is an incredible piece of equipment. Thanks for sharing.

Hi there,
Being thinking over the ratio here, if to match my 1:10 scale excavator, the dump truck will be out-sized my excav, so i'm planning for 1:14 or 1:16, so they both can 'play' together, i hope..:o

[izzzul]

When you do the 960E truck, the drive line can be very prototypical - a traction motor in each rear wheel assembly and electrically driven! That will be one large toy. What do you have in mind for getting tires? I've looked at doing a Komatsu HD785 truck (100 ton) in 1/14 scale, but have not found any tires that are close to diameter/width combination. Anyway, enjoying the excavator build and looking forward to the truck.

Ken

Ken,
I need a big and powerful drive-terrain/planetary gears here, still designing...size will try to come head to head with my Excav, at 1:14 scale, the length will be slight more than 1 meter, and 0.6meter in height I think..maybe slightly smaller than this, as to match all other gadgets...tires...i will custom made here, Tom (Thx Mr MODELMAN) had given me the info on the Si-Rubber mfgr, and i got the quote for the material i need, right now, to come up with the mold..before i order them, or second choice is to customize them as per my existing Volvo Dump Truck..(solid rubber and hand cut the thread)..

[Rebekah_harper]

hiya,

I am following your build with great interest and love what you have achieved.

I am an ex digger driver and found that transferring my skill as an operator was something to get used to but not difficult.

here are some suggestions if you like to help learn the basics of fluid driving.

first is to master the use of 2 actions at one time this you do by operating the boom and jib simultaneously. the aim is to be able to follow a flat ground surface in paralell with the teeth. as you pull the jib in, raise the boom at the appropriate speed in order to follow the ground level. it is best to start with the jib a little further out than 90 degrees to the ground and practice this with moving the jib out further and further. good drivers would not have it at full stretch when doing this but experienced drivers will.
once you have mastered this then move onto 3 movements at the same time this is the inclusion of the bucket. again as the first excersise but have the bucket flat to the ground surface. bring in the jib at a constant speed and adjust the boom hieght and bucket level so that the bottom of the bucket remains flat with the ground.
build on this by adding slew control, and again bring in the jib whilst keeping the bucket flat with the ground but add a slew action as well.

the whole package should be a fluid motion but like with real life mini diggers, the model is highly responsibe so plan the motion in your mind and keep one step ahead of the work you wish to carry out.

it is always best to have the controller on a strap so that your hand/fingers are soley there to control the sticks and to rest your palm beside them.

the big machines have a little lag and there for are easier to plan with your movements but as I said the models and the real life mini diggers don't have that luxury and there for can be more difficult to control.

hope that this helps and that you have found it usefull.

again I am really impressed with your build and hope that my build has the same result.

kind regards

becky

[izzzul]

Thank you so much Becky, that's help, will practice more here, my hand still shaking sometimes...lol. thought playing aircraft/heli is tough, this EXCAV is the same too, but of course not till crashing to ground..

aim to complete the whole construction army and play with my frens here..(excav, dump truck, articulate truck and wheel loader)..trying to get more ppl here to join this interesting hobby (plus some req for custom build). can you share your 954 build, love to see the hyd motor in action..

[dirtpusher9]

WOW, remarkable work on the machines. In the right setting it would be hard to tell from the real thing, as it should be.

[izzzul]

hi, i wanna share some final look of my build....when all the decal n sticker meet the cabin body....next is time to improve my handling skills...still far to match Reg in his Volvo EC300D..will share some video later..
http://1.bp.blogspot.com/-Kn0KvNqLqKo/T7UI4Ra8GPI/AAAAAAAAAYQ/nHxmEPU7EIA/s640/16052012_2.jpg
http://1.bp.blogspot.com/-T3nG5wg3wYY/T7UI_PT90RI/AAAAAAAAAYY/f4h9uX66GOg/s640/16052012_5.jpg
http://1.bp.blogspot.com/-MgusT3W9tpc/T7UJLbiKxvI/AAAAAAAAAYw/Y9S2AryEUuU/s640/16052012.jpg
http://4.bp.blogspot.com/-Cn-M4W46CNY/T7UJRLYQfcI/AAAAAAAAAY4/CkIRUbyfe-0/s640/16052012_9.jpg
http://1.bp.blogspot.com/-ps2mBpU4nSE/T7UJXw_3U7I/AAAAAAAAAZA/iJwHfw4pbqE/s640/16052012_7.jpg

[Madda]

That is nice build! Congratulations on your accomplishment!

One thing that bothers me is that the hydraulic rams are silver but yellow or black would be bettter for these.

Have fun with this and show videos!

[izzzul]

That is nice build! Congratulations on your accomplishment!

One thing that bothers me is that the hydraulic rams are silver but yellow or black would be bettter for these.

Have fun with this and show videos!

yes, you're right, i'd missed this, suppose to be yellow in color, will do the touch up later...thx for pointing this out..

[RCP57]

WOW:eek:, That looks fantastic! Great job...and you have two!

I think you'll be operating yours nice and smooth in no time!

Reg

[Madda]

yes, you're right, i'd missed this, suppose to be yellow in color, will do the touch up later...thx for pointing this out..

Good, show some pics then too!


PS! I didn't mean to say that your build looks like **** because of these, just a reccommendation:cool:


Don't worry about the handling skills, you will get the tricks in no time:D

[izzzul]

no prob Madda, will share the pic and video later, at same time, still working to complete the main skeleton for the KAC960 dump truck...

[izzzul]

just wanna share some latest video today (had no time to snap video), stuck with other things, summer holiday, etc... sorry.. refer my blog below:

http://my-rc-page.blogspot.com/

[Lil Giants]

Yes, a good radio to operate these powerful models gracefully is a must!

What radio are you considering to use with the excavator?

May I suggest shorter arms for the upper bucket linkage to increase your bucket curl radius?

That hoe is freaking huge! A great comparison photo with your daughter. :cool:

[izzzul]

Yes, a good radio to operate these powerful models gracefully is a must!

What radio are you considering to use with the excavator?

May I suggest shorter arms for the upper bucket linkage to increase your bucket curl radius?

That hoe is freaking huge! A great comparison photo with your daughter. :cool:

Thx Joe,
I hv 2 spares of 7 Chl JR Propo/Spectrum RX, it has fair mixture of settings/prgms that i can play with, i'm planning to follow the same setting that i saw on your previous posts (other threads). I agree with that shorter linkage for bucket, i'll modify that.

I'm pretty happy on the run time though, using small VDC supply, i can play up to 1 Hr each time. I have to stop coz it too hot (LRP Truck Puller BEC for the rotary table motor). Plan to install a mod fan, attached to the hyp pump motor to circulate heat in the cabin out through the perforated top panel.

Let me know if you hv some other thought.

[doodlebug]

Thx Joe,
I hv 2 spares of 7 Chl JR Propo/Spectrum RX, it has fair mixture of settings/prgms that i can play with, i'm planning to follow the same setting that i saw on your previous posts (other threads). I agree with that shorter linkage for bucket, i'll modify that.

I'm pretty happy on the run time though, using small VDC supply, i can play up to 1 Hr each time. I have to stop coz it too hot (LRP Truck Puller BEC for the rotary table motor). Plan to install a mod fan, attached to the hyp pump motor to circulate heat in the cabin out through the perforated top panel.

Let me know if you hv some other thought.

Have you seen the aluminum heat sink's that clamp to the motor's?

Cheer's, Neil.

[izzzul]

Neil,
It's not the hyd motor that getting hot, it's the BEC aka ESC for the turntable motor. The pump motor, so far so good, i'm using high Amp (29A, 12VDC here). Instaed of inst a fan, i wanna glue a artificial blade on the BL motor body, and it will direct the cold air from outside, to cool down the whole units. Having heatsink on the BEC body would be great idea too, thx.

Maybe that's not the real trouble, i dont hv to play for >1Hr time everytime, just tried to push up to the limit here, to see anything would fall apart or break..once my Dump Truck is ready, it would be great conbination i think. I love this stuff:p

[izzzul]

It is rainy season nowadays, and i wanna test my EXCAV in the mud. So, I dug a hole and waited for storm water to fill up and plan the mud like a kid...see video below:
http://youtu.be/khNYx5bPiV0
http://4.bp.blogspot.com/-5HN16vGyR4U/UFWBCjfYnaI/AAAAAAAAAnc/c5fF9rvkzlw/s1600/DSC_1297.jpg
http://2.bp.blogspot.com/-SRB9ruHnSow/UFWA2rYPPrI/AAAAAAAAAnU/_oMacatRCJo/s1600/DSC_1299.jpg
See more details in my blog: http://my-rc-page.blogspot.com/

[izzzul]

Here is the video (youtube):
http://www.youtube.com/watch?feature=player_embedded&v=XMgpvZyLSW4
http://www.youtube.com/watch?feature=player_embedded&v=rQ_o-F5Xxx0
http://www.youtube.com/watch?feature=player_embedded&v=khNYx5bPiV0
http://www.youtube.com/watch?feature=player_embedded&v=7ofdtWL5ZWg
http://2.bp.blogspot.com/-V-TRK4cRCf4/UFWt2QsBpfI/AAAAAAAAAn8/YkCgRMdpp54/s1600/DSC_1301.jpg
http://1.bp.blogspot.com/-oYaN1_8oyn4/UFWu0tB-nJI/AAAAAAAAAoY/E7wNPD-8jUc/s1600/DSC_1318.jpg

[izzzul]

My EXCAV is sick...broken gears for the undercarriage track..it stuck in the mud for many weeks...too deep inside..and was not able to push herself out...damage the gears (expected already, because of actual design suppose to use bigger gears)
http://1.bp.blogspot.com/-omKqh3vlNms/UOBU8omuAhI/AAAAAAAAA3U/MBWM6ZycfIo/s1600/DSC_1393.jpg
original straight bevel gears known to be not good, and now we found the solution to it.. Changing to bigger and better hypoid/spiral bevel gears... upgraded undercarriage jumbo gearing, look alike a grinder head, no problem to smash anything on its path..
http://3.bp.blogspot.com/-TxdLeUtOzCM/UOBVEgtOXRI/AAAAAAAAA3s/XVz1r_x-0x4/s640/DSC_1807.jpg
http://2.bp.blogspot.com/-4r4sDUoRh4Y/UOBVZU9YosI/AAAAAAAAA4M/Z0w50M1c-1U/s640/DSC_1813.jpg
climbing 30degree angle with no issues, see below:
http://4.bp.blogspot.com/-3M6Wrz_0Dnk/UOBVMoKT7XI/AAAAAAAAA30/G78iCil2xSU/s640/DSC_1818.jpg
also taking time to upgrade the radio system, changing to 9Ch TURNIGY TX/RX system...smaller, more hi-tech and complex.. fuh..too many switches now...using glider mode, coz EXCAV mode is not available at this moment..sigh! all the stick functions work exactly as per real EXCAVATOR. the track function is mod to use the 5th and 6th Ch... 7th Ch for Hyd pump/motor, and left 2 more Ch for extra things in future..
http://4.bp.blogspot.com/-295uHL1nC40/UOBW9o2j4RI/AAAAAAAAA4o/KArPLTDbMdg/s640/DSC_1814.jpg
http://1.bp.blogspot.com/-M9iIiPslYQ0/UOBXVfSkc8I/AAAAAAAAA44/iQ6CWihGlE4/s640/DSC_1810.jpg

visit my BLOG for full images http://my-rc-page.blogspot.com/

[Espeefan]

Wow, that's impressive! Your home made radio, with 4 sticks is also really something to behold! Very creative. Hard to believe the small bevel gears you used for the track drive actually held up for so long. That is incredible.

[Lil Giants]

Kool!!! good to see you upgraded to the 21st century Izzzul and got yourself some computer radios.. the smoothness of control is much better, eh?! :D

Izzzul's pics are deceiving Nathan, his hoes dwarf the Vario & those 'lil' bevels are likely 25mm dia? :D Grinder angle drives, what an ingenious & perfect fit to your creations, they look like they were made for the application, very nice! :cool:

[D8R]

Looks good with the new drives (from any 5" grinder I guess).
Whats the size of tires on the Volvo dumper?

Dan

[izzzul]

Wow, that's impressive! Your home made radio, with 4 sticks is also really something to behold! Very creative. Hard to believe the small bevel gears you used for the track drive actually held up for so long. That is incredible.

Yes, i was surprise too, it was titanium grade, that's why, maybe.

Kool!!! good to see you upgraded to the 21st century Izzzul and got yourself some computer radios.. the smoothness of control is much better, eh?! :D

Izzzul's pics are deceiving Nathan, his hoes dwarf the Vario & those 'lil' bevels are likely 25mm dia? :D Grinder angle drives, what an ingenious & perfect fit to your creations, they look like they were made for the application, very nice! :cool:

Yes Joe, I'm finally on entering the cyber world..this one has nice but complex twist...like it, but to learn a lot..25mm dia bevels are no match for 50kg monster.. :D I like the look of the grinder head myself....it's very strong and big..about 55-60mm in dia..

Looks good with the new drives (from any 5" grinder I guess).
Whats the size of tires on the Volvo dumper?

Dan

Dan, yes my grinder-head track works great...and the tires are about 100-110mm dia, it's a hand made from solid rubber role, hand crafted the treads..very heavy and stiff...but it works fine with my models, so far so good..

[izzzul]

Just wanna share some more pic and videos here...Spent hours with My-RC-Team frens, was fun and exciting..! Battery lasted for about 1Hr each for main and the back up batteries, definitely great news as we can spend hours next time...and backup genset will be helpful if to play all day long......our Articulate truck cannot coop with EXCAV!
http://www.youtube.com/watch?feature=player_detailpage&v=nspHDm0zIMc
More videos in my BLOG here: http://my-rc-page.blogspot.com/
Here are some pics:
http://4.bp.blogspot.com/-ACXp58RS2cY/USIxIjjmmzI/AAAAAAAAA-U/IvR7ygQiXK4/s1600/DSC_1978.jpg
http://4.bp.blogspot.com/-N1Zy20d-BHs/USIxKAg1FwI/AAAAAAAAA-c/32YKbJ2QcSo/s1600/DSC_1979.jpg

[Lil Giants]

Great work Izzzul! :cool:

Are both excavators 2.4 now? I couldn't see which one seemed smoother than the other, but they both look like you have much finer control.

I've been watching too many yt vids already this month & used up my bandwidth allowance, now my speed is cut down to dial-up speed... but I'll be sure to watch all the latest vids of your's in a few wks when my speed is restored. ;) :D

[izzzul]

Great work Izzzul! :cool:

Are both excavators 2.4 now? I couldn't see which one seemed smoother than the other, but they both look like you have much finer control.

I've been watching too many yt vids already this month & used up my bandwidth allowance, now my speed is cut down to dial-up speed... but I'll be sure to watch all the latest vids of your's in a few wks when my speed is restored. ;) :D

Yes Joe...tq for viewing, commenting..and guiding..both using 2.4GHz now, we both still fine-tuning the servo throw, for smoothest move..i hope..time and practice will tell.

[fiezmarquis]

wow... what a good work.. i love excavator.. i wanna own it..but how to? what should i do first?

[der82c]

changed the pump for the "older brother", for more battery power save & efficient. look smaller than the older pump, but able to deliver enough pressure and flow rate. using a smaller motor too.
http://i38.photobucket.com/albums/e119/derrick82c/motorupgrade6_zps8d66d006.jpg
http://i38.photobucket.com/albums/e119/derrick82c/motorupgrade1_zps22a1dd97.jpg
http://i38.photobucket.com/albums/e119/derrick82c/motorupgrade2_zpse625becc.jpg

[der82c]

still got a abit of time and space for few snap shots

http://i38.photobucket.com/albums/e119/derrick82c/motorupgrade4_zpsea227ecb.jpg
http://i38.photobucket.com/albums/e119/derrick82c/motorupgrade3_zpsb5a63673.jpg
http://i38.photobucket.com/albums/e119/derrick82c/motorupgrade5_zpseb967b88.jpg

[ricm]

100% INSANE! awesome build, love it. True engineering skill! :bounce::bounce:

[doodlebug]

I like how you set the new pump up! thanks for sharing the mods! That battery looks like a perfect counter weight.
Cheers, Neil.

[JAMMER]

Izzzul I always said bigger is better and you have proved that. Great job I really like your excavator and what you have don with it. It seems to me it would be easier to get parts for your machine than the ones from Germany. It looks like you used a lot of of the shelf parts in you build. Very impressive the way you went abut it. Ed