1/14 Komatsu PC200 build

[der82c]

Hi guys,
I am Derrick, friend of Izzul. Previously, together we built the "1/10 Komatsu PC650" and were posted on this forum at:
http://www.rctruckandconstruction.com/showthread.php?t=3616&highlight=EXCAVATOR+MALAYSIA

the cost to built the 1/10 is expensive and to travel the huge excavator is killing. some of the local rc fans had requested a smaller, budget-able and less-power version, the "1/14 Komatsu PC200"

And the story goes on again...

[der82c]

start of with a small cute die-cast for the critical dimension and feature.

3623

[der82c]

then every night on screen for CAD drawing...

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[der82c]

and many more nights...

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[der82c]

MOre and MOre sleepless nights...

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[der82c]

Not to forget those standard parts

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ooh, but the control valve is not from standard part, its custom made

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[der82c]

the fabrication of sheet metal

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[der82c]

mild steel arm and boom, sus bucket
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[Lil Giants]

Great idea putting the swing motor in the cab area, all too often a wasted area by other model companies. ;)

Steel fabrication is becoming more popular all the time & so much simpler to form & weld than aluminum... not to mention the weight advantage that these models are always lacking.

The last pic of the press, is it a place where you work daily? Are you a metal worker by trade?

[der82c]

Great idea putting the swing motor in the cab area, all too often a wasted area by other model companies. ;)

Steel fabrication is becoming more popular all the time & so much simpler to form & weld than aluminum... not to mention the weight advantage that these models are always lacking.

The last pic of the press, is it a place where you work daily? Are you a metal worker by trade?

the swing motor, i intend to put it vertically instead of horizontal cause its a PC200 body, its relatively small size excavator. not much space left, cabin area is the only chance.
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aluminum is light weight but don't have the strength, need up to thickness 3mm to nearly equal the strength of 1m steel. while my welder always quit worry on welding aluminum, tricky skill needed. while steel is less costly, but the rusting problem. epoxy powder coat will solve it.

i am a CAD drafter in a sheet metal fabrication factory. so it was easy for me to done all those metal stuff. i do the drawing, while my guy do all the bending, welding, drilling and etc. they are experience and skillful worker, but sometimes they got me boil up my head when they create rejected parts.

[JAMMER]

Very nice job. I really like the size of your excavator and the power. Ed

[doodlebug]

I'm interested to see how your custom valves turnout!
Cheers, Neil.

[der82c]

I'm interested to see how your custom valves turnout!
Cheers, Neil.

hi Neil,
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look familiar, isn't? No, is not the one you think. still it is a same old spool-valve but internally i redesign the whole thing for better seal to prevent over-flowing, improving the fluid route and adapt for bigger size connector and hose. ease of attaching extra flange if needed

[Lil Giants]

Yes, looks very familiar ;)... so what size ID hose will you be using?

[der82c]

Yes, looks very familiar ;)... so what size ID hose will you be using?

for this model will be using ID 2mm dia. hose. in the future, for bigger model will try for ID 4mm dia.
i won't stop, will push those pumps and valve to the limit. oooh yeah!!!

[der82c]

ready to send for epoxy powder coat.
3 sets, as per request will be a black and white excavator. what?!
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notice that, don't have any cabin cover parts in the pic, more story coming in.

[der82c]

it's my first 3d-print out experience. it took me 7hrs just for waiting on this front-cabin cover done printed out. i still have to do the rear counter-weight cover and engine cover. how many long hours it is going take anymore?
No, i put aside this 3d-print for awhile, i need to install those metal parts now and have the system running, on priority.
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[Azonic]

Very nice work!

[der82c]

got those sheet metal parts back from powder coat
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so does partial of those machining parts. while my factory will have the tools and machine to do all those sheet metal but do not have the facilities to machine these parts. luckily i can always get help from next door. the cnc machining workshop is just next to my work place.
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i lay out all the parts i got today, it's look like a complete set but no, still some critical parts the machining shop owe me.
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oh well, chinese new year is just few days away. all works at metal shop is shutting down. i need to get prepare for the festive. i think i will just put on-hold for 10 days holiday.

[der82c]

Derrick, very nice work! :bounce:Thanks for sharing. With experience on 650, this one is even better. Looking forward to seeing this in action.

Wishing you a very happy CNY! :)
Kevin

hey Kevin!
how are you? how is the progress of your excavator?
it will be slightly ease for me on this model since all the pain i got from the PC650. tell you a secret, we nearly gave up that time, problem keep occur one by one, sleepless night thinking of solution. lack of experience. but still there a challenge for this model as it's a PC200 which i had to squeeze in all the system in to its small compartment.
how about this way, Kevin. i try my best to finish this a.s.a.p in order to bring this model to SG, to play along with yours. how is that? by that time you must too able to finish yours , ok?

Happy Chinese New Year! to you too. wishing you have a prosperous yearS

[der82c]

Hi Derrick,

Mine is a combination of high and low technology...starting from high end laser cut, precision CNC...all the way to handmade gearbox. All these processes are not consistent...resulted in variances like very noisy when it runs..all are powered by Lepard 4082 brushless motors. Not sure if you know about this motor, it was used for 1/5 car, just one will push speed up to 60 miles and I have 4 plus one giant motor in my excavator. It becomes super complex...I didn't use any gear reduction motor. I was a wrong decision I guess.

This is my first build...want to learn some experience for next one. Yours is much better than mine...it looks perfect. My supid excavator weights 50kg now after adding 5mm thickness SS304 boom. I have hard time to move this thing from living room to my little work shop...will see how it goes.

Let's keep in touch! and wishing you a very happy New Year!!
Kevin

http://www.rctruckandconstruction.com/attachment.php?attachmentid=3671&stc=1&d=1390704039

Kevin, what is your cylinder bore size and the flow rate of your pump?
my 650 boom is from 1.5mm thickness, is more than enough to lift a child. as long as its had the right structure.
i know how u felt, its not a fun thing to do, moving the heavy machine around. i will have second thought now, if friends ask to bring it out for a play.

[der82c]

the machinist really keep his word, finish up all the parts before the holiday.
tempting to install it during the CNY holiday. sure will get nagging from my mom and gf, almost spend most of the time on the excavator even during festive holiday.
http://i38.photobucket.com/albums/e119/derrick82c/280114-1_zpsaf68bcfd.jpg
http://i38.photobucket.com/albums/e119/derrick82c/1552979_10152151642858630_706039495_n_zps0b7f63ec. jpg
http://i38.photobucket.com/albums/e119/derrick82c/1616378_10152158310398630_1531231041_n_zps5e6c7402 .jpg

just in time send for black anodise.
http://i38.photobucket.com/albums/e119/derrick82c/1420646_10152160494853630_1819746279_n_zpsf4818f16 .jpg

[der82c]

http://i38.photobucket.com/albums/e119/derrick82c/1040183_201881493341514_1963447427_o_zps2de457f7.j pg

[der82c]

closer and bigger look onto the 3d print cab
http://i38.photobucket.com/albums/e119/derrick82c/20140106_230050_zpsca33dc21.jpg

[izzzul]

Hi guys, here some first few videos we took for this recent build...yet to fine-tune quite a few things over here..
http://www.youtube.com/watch?v=UNMVG6dgWko

And this is the pic comparison between previous build PC650 (1/10 scale) and PC200 (1/14 scale)
http://2.bp.blogspot.com/-Py24tZRJdzE/Uuw_3y4DYwI/AAAAAAAABhU/Skbp9NccSiw/s1600/1655871_650095555056458_1286235554_n.jpg
http://2.bp.blogspot.com/-IpWf2Qv7q2g/Uuw_2nzYrpI/AAAAAAAABhM/w5R_cAmbhTU/s1600/1656150_650094625056551_1441727456_n.jpg
http://4.bp.blogspot.com/-Oe__BDGfSxI/UuxF4-AT2GI/AAAAAAAABiA/8SOGOVKzm8I/s1600/1601021_641534352579245_1473255087_n.jpg

[Lil Giants]

WOW! how did you get that monster 650 up on that bench?! :eek:

[izzzul]

..ermmmm..Joe, we had to use hyd jack trolley here...then crawl fwd.. :)
http://1.bp.blogspot.com/-VCbo3yWu5MY/UOBXHKLyowI/AAAAAAAAA4w/p0zlF6ZynmE/s640/DSC_1805.jpg

Here is vid for my whole build fleet in action...(Excav, Dump Truck, Tipper, and Tipper Trailer) in action in some official event back here...
http://www.youtube.com/watch?v=_fg0QJotx50
http://3.bp.blogspot.com/-96IY4j03nGw/UuxUR36sIGI/AAAAAAAABik/4rOsfhvlec8/s1600/DSC_3586.jpg
Refer below for more video, highlights, and PC200 Build progress: http://my-rc-page.blogspot.com/

[der82c]

one of 3 sets, been color yellow and other 2 still in white.

http://i38.photobucket.com/albums/e119/derrick82c/020214-10_zps164bd211.jpg

[der82c]

the cyclinder yet to be paint, but eager to install it.

http://i38.photobucket.com/albums/e119/derrick82c/020214-1_zps4a9fc98f.jpg
http://i38.photobucket.com/albums/e119/derrick82c/020214-4_zps7fdfbc7e.jpg
http://i38.photobucket.com/albums/e119/derrick82c/250114-11_zpsfaa7709f.jpg
http://i38.photobucket.com/albums/e119/derrick82c/250114-6_zps3909014c.jpg
http://i38.photobucket.com/albums/e119/derrick82c/020214-9_zpsa0f570f9.jpg

[torarne81]

Nice build :)

[Lil Giants]

So what closet are you building this beast in so your mom & gf don't catch you working during the holidays? :lol: :p

[der82c]

When will you be selling the kit?

Chris

Yes Chris, i be selling the complete set. but not now, i need to finalize and test everything before i could release it.

[der82c]

So what closet are you building this beast in so your mom & gf don't catch you working during the holidays? :lol: :p

ooh, i got no closet that big. but i sneak into the working room at midnight where everyone sound asleep. but i have to gave a damm good explanation why i got the dark circles under the eyes.
i just can't left the parts lying around un-assemble, too tempting.

[der82c]

more close up pic
http://i38.photobucket.com/albums/e119/derrick82c/20140126_101020_zps3b70b1cc.jpg
http://i38.photobucket.com/albums/e119/derrick82c/20140126_101010_zps117af289.jpg
http://i38.photobucket.com/albums/e119/derrick82c/20140126_101001_zps58266249.jpg
http://i38.photobucket.com/albums/e119/derrick82c/20140126_100305_zpse0f3081b.jpg
http://i38.photobucket.com/albums/e119/derrick82c/20140126_100322_zps277ca9a7.jpg

[der82c]

fuuh!, just in time for the 1st run test before the holiday end

http://i38.photobucket.com/albums/e119/derrick82c/020214-3_zps96e4b8ac.jpg

attach to the tester pump to check those joint, movement and joints if its working fine.

[der82c]

http://youtu.be/UV_8CI6jwfQ

testing on 8 bar, normal speed pump. will tray for 10 bar in later days

[Lil Giants]

Not bad for only 8bar.

What's the weight of the model?

[der82c]

wow, looking great! my cylinder bore size: external 22mm, internal 12mm, all made with steel. I've not gotten time to measure flow rate from pump yet since it was customized...

you were right...I need to buy a hydraulic trolley to move this heavy excavator.

hi kevin,
from the dimension you gave, i assume its a 20mm dia bore cyclinder, which same as mine. i am using this for the 650:

http://i38.photobucket.com/albums/e119/derrick82c/20140129_160729_zpsc3622cfc.jpg
http://i38.photobucket.com/albums/e119/derrick82c/20140129_160744_zpsac41b1e5.jpg

its an industrial pump. the flow rate for the pump its 0.2cc/rev and 0.1cc/rev. directly couple to a outer-run. it able to perform smoothly.
what do u think kevin? i can sell this to you as used parts for RM600 a pump attached together with outer-run as a set.

[while i just got a smaller pump, believe to be lower flow rate but able to deliver enough bar, run smaller motor for better energy efficient, but yet to full test it.]

[FlyingBeagle]

I just spent some time looking through your blog and you have several very impressive builds. This excavator looks to be a top notch build as well. I have a couple of questions. I noticed in your dump trucks that you use the UMS hydraulic pump and valves. How are those holding up for you. I have heard mixed reviews, but have not heard anything lately about the durability of the UMS parts. What type of pump and valves do you plan to use on this excavator?


Thanks

[der82c]

I just spent some time looking through your blog and you have several very impressive builds. This excavator looks to be a top notch build as well. I have a couple of questions. I noticed in your dump trucks that you use the UMS hydraulic pump and valves. How are those holding up for you. I have heard mixed reviews, but have not heard anything lately about the durability of the UMS parts. What type of pump and valves do you plan to use on this excavator?


Thanks

the dump truck, i didn't post to this forum yet.
yes, i m using the UMS pump and valves for the dump truck project. the UMS did come with the "pressure over-loading cut off board" instead of regulator.
yup, no regulator.
when the cylinder extend to the max, pressure from the pump keep gaining while there no regulator to route the extra pressure back to tank. now where the "pressure over-loading cut off board" come in working with delay of 3 second to cut off.
about the valve, i had to change a better quality O-ring. as my 1st test, leakage from the valve, so does to the 2nd and 3rd set. i guess, the default O-ring is not the good quality type.
the pump, the sound of the motor is quit high pitch due to its brushless motor. therefore, its gain flow rate instantly. pressure as real as its stated max 10 bar, more than that, i have not yet to push it.

[der82c]

spend many hours of installation,
the 1st dig test.
the swing movement is not smooth, as i bought the wrong ESC which had break function. going to rc shop later to get the ESC with instant reverse.

http://youtu.be/T9LXbuwcvhc

[der82c]

actually i am doing 2 sets of excavator:
1 white and 1 yellow

http://i38.photobucket.com/albums/e119/derrick82c/1529841_208276639368666_629661200_o_zps269010ff.jp g
http://i38.photobucket.com/albums/e119/derrick82c/1556279_208276992701964_458932808_o_zps47a9e8e6.jp g

[der82c]

mean while, the white excavator is currently installing the copper tube for more realistic. another skill i learn while doing this, Blazing.

http://i38.photobucket.com/albums/e119/derrick82c/110214-1_zps8dded70b.jpg
http://i38.photobucket.com/albums/e119/derrick82c/110214-3_zps692cf6ca.jpg
http://i38.photobucket.com/albums/e119/derrick82c/110214-2_zps2cbd2f22.jpg

[der82c]

there more of our work beside excavator can be view from facebook page:
https://www.facebook.com/rccustomizermalaysia

more pic and video of the work will be upload there too.

[der82c]

Final phase of sheet fabrication parts:
The cabin and cover.

http://i38.photobucket.com/albums/e119/derrick82c/20140218_110633_zpsd4fae87f.jpg
http://i38.photobucket.com/albums/e119/derrick82c/20140218_110652_zps97d47ec3.jpg
http://i38.photobucket.com/albums/e119/derrick82c/20140218_110707_zps311ef9a1.jpg
http://i38.photobucket.com/albums/e119/derrick82c/20140218_144713_zpsfab8450a.jpg
http://i38.photobucket.com/albums/e119/derrick82c/20140218_145951_zpseef2d186.jpg
http://i38.photobucket.com/albums/e119/derrick82c/20140218_150000_zpsc594ae6c.jpg
http://i38.photobucket.com/albums/e119/derrick82c/20140218_150041_zpsc09d40ae.jpg

not too much on the detailing, as its still a budget-able machine.

[DADSGARAGE]

Looks great!!

[senatorbillbo]

Man you have got some serious skills... I'd love to pick your brain if youre interested

[der82c]

Looks great!!

thanks, more stuff are coming in, and its going to be finalize soon.

[der82c]

Man you have got some serious skills... I'd love to pick your brain if youre interested

hi there, i got your private msg. sorry, at the moment i can't release the cad drawing to you. despite much hours designing and late nights, there are also other parties involve in this build. their efforts have to be take account, i can't speak behalf of them.
i don't mean serious harm by posting this matter on the open forum, but i am taking this chance to clarify it to all, as not one person been asking abt the cad drawing, i received many msg from difer person regard this.
technical-vise, i can share out, more than wiling.
giving out the whole complete drawing is a different story.
as i understand, at this forum, there are some builders who are not quit good in cad drawing but still they manage to draw and design in a paper, card board, sheet metal, any where they can find that suit them. you can start by learn from them. good luck.

[Lil Giants]

i don't mean serious harm by posting this matter on the open forum, but i am taking this chance to clarify it to all, as not one person been asking abt the cad drawing, i received many msg from difer person regard this.


I don't fault you on that issue of not sharing CAD drawings... sell it to one or two individuals & the next thing you know it's all over the internet for free or worse, some one else tries to sell your hard work for their own $ profit ---> they really want to build it, they can figure it out for themselves. ;)

[der82c]

Hi Derrick,

I cannot agree you more on this topic and admire everything you did to make this happen. It is a big achievement!

To share with you a story...I got a prviate message sometime ago - someone wants to buy my 1/16 Gepard tank. After the second thought, I declined his request. There is something that money cannot not buy.

I need some of your advice...I am sure if I need to add a 1:4 gear reduction on hydraulic pump, it gives higher torque but quites noisy. Do you connect brushless motor directly to pump or you also add that gear reduction? Thanks! Your model looks absolutely stunning!!:)

Best regards,
Kevin

pls don't say that you need my advise, we are just sharing ideas.
for me, i directly attach the brushless motor to the pump, no gear reduce, just a solid coupling. you have to trust the power from the brushless motor, if its not good enough, attach with the outer run motor to the pump just like i did to the 650. if the speed too much, i set the throttle % from the transmitter. once i tried to lower the motor rpm too much, resulting create loading, heat up the esc and fry. well, try and error, pay for the lesson learned. there lot of motor specs around, just have to choose the right torque and rpm.
about the noise from the gear reduce, i think of 2 cause:
1, the contact distance between the gears are not right
2, the gear couple is off set due to wear and tear
what do you think?

[der82c]

I don't fault you on that issue of not sharing CAD drawings... sell it to one or two individuals & the next thing you know it's all over the internet for free or worse, some one else tries to sell your hard work for their own $ profit ---> they really want to build it, they can figure it out for themselves. ;)

thanks for the comment, it clear up my doubt if i am doing it right.
if any of my friends interested in this excavator, i can sell the whole unit to.
its start off as a hobby and interest, i didn't think of the design issue, intellectual property and profits. when this matter arise, its surprise me, i learned, i know what should be the right move now.

[ihbuilder]

You should never sell or give away your intectual property , For all resons lil giants states .

" can sell the whole unit to. " whatch how you word this little quote here in the build forums , It could be construed as you are building for sale . We have a vender section on here for that for a small yearly fee .

OTOH , the excavator looks great . I have operated a few of those with hammers .

[der82c]

at 1st, i thought i will just install all the tubing on the excavator with just nylon tubing as final. i saw lots of other builders are putting in copper tubing. but i was to lazy to make one, then it sudden came to me, why not i gave it a try.
just try 1 pcs, then it was all the way go....
no wonder, i realised how fun and nice looking to have those copper tubing installed.

http://i38.photobucket.com/albums/e119/derrick82c/110214-1_zps6e39dd39.jpg
http://i38.photobucket.com/albums/e119/derrick82c/110214-3_zpse8393c5e.jpg
http://i38.photobucket.com/albums/e119/derrick82c/110214-2_zps2cbd2f22.jpg

be heading to spray paint shop later, to have it colored. let see how its appear out.

[der82c]

fresh, back from paint shop. with the cover too.
while the yellow will be done tomorrow.

http://i38.photobucket.com/albums/e119/derrick82c/030314-1_zps78426fb5.jpg
http://i38.photobucket.com/albums/e119/derrick82c/030314-3_zps1f661aa6.jpg
http://i38.photobucket.com/albums/e119/derrick82c/030314-2_zpsa4d7049f.jpg

[der82c]

the yellow unit is back from the paint shop.

http://i38.photobucket.com/albums/e119/derrick82c/050314-1_zpse320cd6e.jpg
http://i38.photobucket.com/albums/e119/derrick82c/050314-3_zps900b686f.jpg
http://i38.photobucket.com/albums/e119/derrick82c/050314-2_zps841c111a.jpg
http://i38.photobucket.com/albums/e119/derrick82c/050314-4_zps352aaef2.jpg

next week will shot some video of it in action...

[Lil Giants]

Videos? :)

[ricm]

Great looking machine, superb quality build - awesome :bounce:

make sure you keep all that CAD work to yourself!!

[der82c]

Videos? :)

some video to share:

the yellow
http://youtu.be/YxGKOOtq9Tk

the white
http://youtu.be/-GIf1K2KA4I

video at local event last week

[ihbuilder]

Nice to see it in comparison to the trucks . the proportion looks perfect :cool:

[Lil Giants]

Great work Derrick, the two hoes perform very well.

Thanx for sharing. :)

[trucker n]

I want one

[der82c]

the 650 with is bigger size bucket, will fill up the truck with just 3 scoop, not much fun. now, the 200 with its smaller bucket, more than 5 scoop to fill up.
have to work hard and fast.
hoping to share more video, but right now have to start concentrate on other project.

[der82c]

Super awesome! I want to build a smaller one too.

with its small size, abt 10kg. its much ease for me to bring around to show off.
previously for 650, i will think twice if some one ask to bring out from the workshop and demo.
a minute, the 200 is on the dirt, the other minute, its on the table at the study room. no more hiding at the workshop.