RC Truck and Construction  

Go Back   RC Truck and Construction > RC Truck's Ag and Industrial Equipment and Buildings > Construction Equipment

Construction Equipment If it digs, pushes, hauls dirt "off road" post it here.


Reply
 
Thread Tools Display Modes
  #81  
Old 06-09-2022, 07:49 PM
Tgrzes Tgrzes is offline
Newbie
 
Join Date: Aug 2020
Posts: 95
Tgrzes is on a distinguished road
Default Re: Build an Excavator from Scratch

I think it
Reply With Quote
  #82  
Old 06-10-2022, 03:59 PM
pufferfish pufferfish is offline
Newbie
 
Join Date: Dec 2021
Location: Cologne, Germany
Posts: 91
pufferfish is on a distinguished road
Default Re: Build an Excavator from Scratch

Todays work was a repair of the stick cylinder. Before the final assembling i've made the mistake to pull the rod complete to the end. During normal operations this never will happen due to the geometry of the stick.

At the end of the cylinder the piston collides with the oil input flange


thereby the piston seals get damaged



To open the cylinder i have to loosen the head. Sealed with loctite 542 thread sealant it just needed some hot air



After replacing the piston o-rings and refilling the oil then thread sealant is applied


Now I have to wait 24 Hours before the glue is cured.
__________________
Regards
Ralf
Reply With Quote
  #83  
Old 06-11-2022, 10:47 AM
pufferfish pufferfish is offline
Newbie
 
Join Date: Dec 2021
Location: Cologne, Germany
Posts: 91
pufferfish is on a distinguished road
Default Re: Build an Excavator from Scratch

24 hours later: The repair was successful.


The stick holds his position.

After this I've made a last stress test.

Mounting all the 20kg ballast as counterweight


And a little mandrel press was the lifting object


her weight


and finally the test. lift and hold. passed.


I'm very satisfied with this result. After a holiday the final work on the hull begins...
__________________
Regards
Ralf
Reply With Quote
  #84  
Old 06-13-2022, 03:59 PM
pufferfish pufferfish is offline
Newbie
 
Join Date: Dec 2021
Location: Cologne, Germany
Posts: 91
pufferfish is on a distinguished road
Default Re: Build an Excavator from Scratch

Detailwork.

A rough sawed


and fine filed patch for the cutout of the ladder lever


A door handle


and handrails complete the second of four parts of the hull.
__________________
Regards
Ralf
Reply With Quote
  #85  
Old 07-06-2022, 01:00 PM
pufferfish pufferfish is offline
Newbie
 
Join Date: Dec 2021
Location: Cologne, Germany
Posts: 91
pufferfish is on a distinguished road
Default Re: Build an Excavator from Scratch

Hi. Nothing new due to a vacation, but today i have a first training session for my eye hand coordination.

Works a bit better but still much to learn

A short clip

https://vimeo.com/727432466
__________________
Regards
Ralf

Last edited by pufferfish; 07-06-2022 at 01:02 PM.
Reply With Quote
  #86  
Old 07-12-2022, 04:25 PM
pufferfish pufferfish is offline
Newbie
 
Join Date: Dec 2021
Location: Cologne, Germany
Posts: 91
pufferfish is on a distinguished road
Default Re: Build an Excavator from Scratch

At least, the Beast is done

The official pictures of my first scratch build of an excavator in 1/10 scale.










Thanks for watching
__________________
Regards
Ralf
Reply With Quote
  #87  
Old 07-13-2022, 12:57 AM
Blender's Avatar
Blender Blender is offline
Green Horn
 
Join Date: Sep 2010
Location: Chandler, Arizona
Posts: 162
Blender is on a distinguished road
Default Re: Build an Excavator from Scratch

Looks great.

Will it be painted in a specific brand's colors or left in bare metal?
Reply With Quote
  #88  
Old 07-13-2022, 10:06 AM
frizzen's Avatar
frizzen frizzen is offline
Big Dawg On The Bone
 
Join Date: Jan 2016
Location: indy, indiana
Posts: 2,055
frizzen is on a distinguished road
Default Re: Build an Excavator from Scratch

Great job, that's an amazing machine!!!
__________________
What do ya mean "Cars are neither Trucks or Construction"?
It's still scale, and i play fairly well with others, most of the time...
Reply With Quote
  #89  
Old 11-27-2022, 03:32 PM
pufferfish pufferfish is offline
Newbie
 
Join Date: Dec 2021
Location: Cologne, Germany
Posts: 91
pufferfish is on a distinguished road
Default Re: Build an Excavator from Scratch

Hi there,
during some test digs i've noticed that the beast have an issue when the body stands not exactly horizontally. due to gravity and the small rotary drive motor/gearbox the loaded arm turns every time toward the lower end. just active steering against is avoid uncontrolled movement of the arm. thereby it was difficult to dig and put the load into the dumper.

Somebody told me, that cascaded planetary gears are tends to self-locking. I buy some of them and a couple of tests later i decided to change the rotary drive.

old motor vs new motor


after some adjustments of the sledge it fits well.
the gear ratio is 130:1



mounted in his small place



and then the first test. i'm happy when i've realized that it works pretty well

it runs smooth and hold the arm with load even if the body is tilted


additionally i've changed the esc to a hobbywing 1080 with active hillbreak for the last bit of holding power.
__________________
Regards
Ralf
Reply With Quote
  #90  
Old 11-27-2022, 04:25 PM
jerry56 jerry56 is offline
Craftsman
 
Join Date: Apr 2019
Location: WV Panhandle
Posts: 761
jerry56 is on a distinguished road
Default Re: Build an Excavator from Scratch

I never thought about that ... but yeah I can see where you would need either a planetary gear or a worm gear to hold the boom in place once you stop swing...
I used a 90 degree worm drive motor in mine so I never had the problem...
Reply With Quote
  #91  
Old 11-27-2022, 04:51 PM
pufferfish pufferfish is offline
Newbie
 
Join Date: Dec 2021
Location: Cologne, Germany
Posts: 91
pufferfish is on a distinguished road
Default Re: Build an Excavator from Scratch

Thanks. This is my first excavator and i don‘t have any experiences or knowledge of these monsters before the build. Thereby i‘ve underestimate massively the working forces.

Learning by doing
__________________
Regards
Ralf
Reply With Quote
  #92  
Old 11-29-2022, 09:38 AM
frizzen's Avatar
frizzen frizzen is offline
Big Dawg On The Bone
 
Join Date: Jan 2016
Location: indy, indiana
Posts: 2,055
frizzen is on a distinguished road
Default Re: Build an Excavator from Scratch

That's really cool!
I didn't know that stacking planitary gears like that could give a locking geartrain.
__________________
What do ya mean "Cars are neither Trucks or Construction"?
It's still scale, and i play fairly well with others, most of the time...
Reply With Quote
  #93  
Old 11-29-2022, 08:03 PM
kerst's Avatar
kerst kerst is offline
Apprentice
 
Join Date: Oct 2010
Location: NY
Posts: 471
kerst is on a distinguished road
Default Re: Build an Excavator from Scratch

Impressive!

Kerst
Reply With Quote
  #94  
Old 12-07-2022, 04:11 PM
pufferfish pufferfish is offline
Newbie
 
Join Date: Dec 2021
Location: Cologne, Germany
Posts: 91
pufferfish is on a distinguished road
Default Re: Build an Excavator from Scratch

thank you guys.

The next step was the improvement of the hydraulic cylinders. The old version works well, but is a little bit leaky.



I've used O-Rings as seals and simple Stainless Rods. The upgrade is replacing the o- through x/quad-rings and using hard chrome plated rods.
It was not easy to find them in only 10mm diameter. But here they are



First item was the bucket cylinder.

A challenge for me was the new material C45/1.0503/AISI 1045 but it was easier than expected, including turning a m10 thread (a tap wrench doesn't work proper)




Additionally I've made better fitting pistons





To change the cylinder head from o ring to x ring grooves i need a 3mm wide internal grooving tool.
I've grind a rough thing from a blank





close but works



Aaaand after a 20 min testdig with really heavy clayey ground (directly from the excavators trailer to avoid too much dirt in the shop)




the cylinderhead is still sealed



Next step: upgrade the other cylinders.
__________________
Regards
Ralf
Reply With Quote
  #95  
Old 12-08-2022, 10:52 AM
egronvold's Avatar
egronvold egronvold is offline
Big Dawg On The Bone
 
Join Date: Dec 2010
Location: Conshohocken, PA
Posts: 1,445
egronvold is on a distinguished road
Default Re: Build an Excavator from Scratch

Always a great feeling when the hours in the shop finally pays off
__________________
Emil G | MFZ Blocher Fendt 926 | RC4WD Volvo EC480 excavator | Carson LR 634 | Kenworth 6x6 hauler | Kenworth 6x6 dtrk
My channel:
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

Construction site on Facebook:
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

Pictures on Instagram:
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
Reply With Quote
  #96  
Old 12-09-2022, 01:14 PM
pufferfish pufferfish is offline
Newbie
 
Join Date: Dec 2021
Location: Cologne, Germany
Posts: 91
pufferfish is on a distinguished road
Default Re: Build an Excavator from Scratch

Indeed

After upgrading all other Cylinders i've discovered the new opportunity to move more than one Cylinder at a time

https://player.vimeo.com/video/779644929

Upgrading is done. Next step will be a quick change system.
__________________
Regards
Ralf
Reply With Quote
  #97  
Old 12-13-2022, 12:41 PM
pufferfish pufferfish is offline
Newbie
 
Join Date: Dec 2021
Location: Cologne, Germany
Posts: 91
pufferfish is on a distinguished road
Default Re: Build an Excavator from Scratch

Actual work: A little Rock Ripper and a first Setup of the Quick changers locking mechanism.









__________________
Regards
Ralf
Reply With Quote
  #98  
Old 01-08-2023, 06:46 AM
pufferfish pufferfish is offline
Newbie
 
Join Date: Dec 2021
Location: Cologne, Germany
Posts: 91
pufferfish is on a distinguished road
Default Re: Build an Excavator from Scratch

After 16 month of work on this Project, it finally comes to an end

The ripper is ripping, the changer changes and all other things are now oil-proofed and working.

A last clip from this little Monster while ripping and digging compacted embankment in my garden.

https://vimeo.com/787182149



Thanks for watching.
__________________
Regards
Ralf
Reply With Quote
  #99  
Old 01-09-2023, 05:26 PM
Krewmember's Avatar
Krewmember Krewmember is offline
Newbie
 
Join Date: Feb 2015
Location: Southwest Ohio
Posts: 117
Krewmember is on a distinguished road
Default Re: Build an Excavator from Scratch

Awesome build, and to your own design as well that makes it even better!
It looks like it has good digging power.


-Shawn-
Reply With Quote
Reply


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -4. The time now is 12:31 PM.


Powered by vBulletin® Version 3.8.6
Copyright ©2000 - 2024, Jelsoft Enterprises Ltd.