Re: KOMATSU Excavator from Malaysia
 

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.

Re: KOMATSU Excavator from Malaysia
 

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.

Re: KOMATSU Excavator from Malaysia
 

Very soon, this will be my main cabin...pending powder coating and final decal...
http://4.bp.blogspot.com/-VX-uRU-rZI...N01_view_a.jpg
http://4.bp.blogspot.com/-y9xZOrWATI...404_132603.jpg
http://3.bp.blogspot.com/-HLyyOfhSrv...N01_view_c.jpg
http://1.bp.blogspot.com/-zWVWu-sHzW...404_132630.jpg

Re: KOMATSU Excavator from Malaysia
 

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.

Re: KOMATSU Excavator from Malaysia
 

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.

Re: KOMATSU Excavator from Malaysia
 

pic of main cabin with some other details (step ladder and side railing)
http://1.bp.blogspot.com/-4r65PiZg3N...405_143459.jpg
complete with exhaust pipe and hooks for the counter weight..
http://1.bp.blogspot.com/-5xOMN0-HG6...405_143521.jpg
Cabin length is about 20-22inches..
http://2.bp.blogspot.com/-e8LtaX83Rh...405_144034.jpg
And this is the real ones, will copy exact the DECALs and details as much as possible..
http://3.bp.blogspot.com/-4oOjr5r9gV...1600/PC650.jpg

Re: KOMATSU Excavator from Malaysia
 

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?

Re: KOMATSU Excavator from Malaysia
 

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

Re: KOMATSU Excavator from Malaysia
 

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

Re: KOMATSU Excavator from Malaysia
 

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

Re: KOMATSU Excavator from Malaysia
 

speechless, thats huge and insane build.

Re: KOMATSU Excavator from Malaysia
 

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.

Re: KOMATSU Excavator from Malaysia
 

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/-ZRlYx749xw...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/-VwXL0U6mSD...0/10042012.jpg

Re: KOMATSU Excavator from Malaysia
 

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

Re: KOMATSU Excavator from Malaysia
 

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

Re: KOMATSU Excavator from Malaysia
 

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..

Re: KOMATSU Excavator from Malaysia
 

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_8GG...io+vs+Mine.JPG
You can further check my blog here as i keep all the pictures and progress there (http://my-rc-page.blogspot.com)

Re: KOMATSU Excavator from Malaysia
 

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

Re: KOMATSU Excavator from Malaysia
 

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..

Re: KOMATSU Excavator from Malaysia
 

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/-qxsUFsru2v...0/29042012.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...&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-...SU+KAC960E.bmp
http://4.bp.blogspot.com/-iZxL1YJ-Oj...40/KAC960E.bmp

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

Re: KOMATSU Excavator from Malaysia
 

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.

Re: KOMATSU Excavator from Malaysia
 

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

Re: KOMATSU Excavator from Malaysia
 

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

Re: KOMATSU Excavator from Malaysia
 

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)..

Re: KOMATSU Excavator from Malaysia
 

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

Re: KOMATSU Excavator from Malaysia
 

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..

Re: KOMATSU Excavator from Malaysia
 

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

Re: KOMATSU Excavator from Malaysia
 

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/-Kn0KvNqLqK...16052012_2.jpg
http://1.bp.blogspot.com/-T3nG5wg3wY...16052012_5.jpg
http://1.bp.blogspot.com/-MgusT3W9tp...0/16052012.jpg
http://4.bp.blogspot.com/-Cn-M4W46CN...16052012_9.jpg
http://1.bp.blogspot.com/-ps2mBpU4nS...16052012_7.jpg

Re: KOMATSU Excavator from Malaysia
 

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!

Re: KOMATSU Excavator from Malaysia
 

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..

Re: KOMATSU Excavator from Malaysia
 

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

Re: KOMATSU Excavator from Malaysia
 

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

Re: KOMATSU Excavator from Malaysia
 

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...

Re: KOMATSU Excavator from Malaysia
 

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/

Re: KOMATSU Excavator from Malaysia
 

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:

Re: KOMATSU Excavator from Malaysia
 

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.

Re: KOMATSU Excavator from Malaysia
 

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

Cheer's, Neil.

Re: KOMATSU Excavator from Malaysia
 

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

Re: KOMATSU Excavator from Malaysia
 

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/-5HN16vGyR4...0/DSC_1297.jpg
http://2.bp.blogspot.com/-SRB9ruHnSo...0/DSC_1299.jpg
See more details in my blog: http://my-rc-page.blogspot.com/

Re: KOMATSU Excavator from Malaysia
 

Here is the video (youtube):
http://www.youtube.com/watch?feature...&v=XMgpvZyLSW4
http://www.youtube.com/watch?feature...&v=rQ_o-F5Xxx0
http://www.youtube.com/watch?feature...&v=khNYx5bPiV0
http://www.youtube.com/watch?feature...&v=7ofdtWL5ZWg
http://2.bp.blogspot.com/-V-TRK4cRCf...0/DSC_1301.jpg
http://1.bp.blogspot.com/-oYaN1_8oyn...0/DSC_1318.jpg