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  #21  
Old 01-22-2022, 08:02 PM
bigpipespete bigpipespete is offline
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Default Re: 1/10 Mining Dump Truck

Simply, wow !
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  #22  
Old 01-23-2022, 12:24 AM
cooker2003 cooker2003 is offline
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Default Re: 1/10 Mining Dump Truck

Real drum brakes even! Impressive!
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  #23  
Old 01-23-2022, 12:49 PM
pufferfish pufferfish is offline
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Default Re: 1/10 Mining Dump Truck

Thanks.

I need two different actuators for my breaks, like the big ones I need a driving and a parking brake.

But i won't two bowden cables. Therefor i've made a central platfrom between the frame. Later truly invisible.

A simple sledge to hold a constant direction. left to the actuators . right to the drums.


the testing arrangement was simple and ugly.

that must be prettier.

to get a weldeable bowden tube in my tiny sizes was impossible. so I've bought

a really small tube stainless
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  #24  
Old 01-23-2022, 01:20 PM
pufferfish pufferfish is offline
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Default Re: 1/10 Mining Dump Truck

....
bending such a small tube
An inlay from 1mm brass rod was the solution
Bending worked wonderful smooth

but i need not a ring but four 90° parts.




inner deburring with a small ball end mill

and welding on the screw wich hold the axle onto the c-hub
to avoid length-changing while steering.


On the other side, a servo and a small n20 gear motor has taken their place.
together with two end switches for the motor, they are the rest of the mechanics.


A short clip of their work, you can see here
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  #25  
Old 01-24-2022, 08:02 AM
Originalrob Originalrob is offline
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Default Re: 1/10 Mining Dump Truck

Wow what a great scratch build !

Keep up the good work !
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  #26  
Old 01-24-2022, 09:44 AM
Hemi1966 Hemi1966 is offline
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Default Re: 1/10 Mining Dump Truck

Looks like you got a Optimum milling machine, is that BF20 ?
Did you cut all the sheet metal parts yourself ?

And also, great work
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  #27  
Old 01-24-2022, 12:40 PM
pufferfish pufferfish is offline
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Default Re: 1/10 Mining Dump Truck

thanks again.
Quote:
Originally Posted by Hemi1966 View Post
Looks like you got a Optimum milling machine, is that BF20 ?
Did you cut all the sheet metal parts yourself ?
yes. its a bf20l.
and yes. i buy simple sheets and cut them self. my tools are a simple lever shear, flex bandsaw, some bender and a old bosch belt sander.

I'm a programmer by trade, so i could use a cad and buy laser cutted metal, but i won't work with computers after the whole day on it.

------------------
Last complicated parts are the telescopic lift cylinders.


They are located in the big slots inside the frame.
Big? When you plan and estimate the sizes of the cylinder, the slots gets smaller and smaller

Seldom I've planned so long for a single part. Maximum and Minimum Angles, posibilities in machining, needed pressure to lift, sizes of the cylinder, rods and pistons and so. So much interdependent variables. I think, the fifth or sixth plan was the base for the first try.
I'll show you the second and last attempt
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  #28  
Old 01-24-2022, 01:01 PM
Hemi1966 Hemi1966 is offline
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Default Re: 1/10 Mining Dump Truck

Quote:
Originally Posted by pufferfish View Post
thanks again.


yes. its a bf20l.
and yes. i buy simple sheets and cut them self. my tools are a simple lever shear, flex bandsaw, some bender and a old bosch belt sander.

I'm a programmer by trade, so i could use a cad and buy laser cutted metal, but i won't work with computers after the whole day on it.
I thought the parts ware laser cut
I also have a BF20L that I converted to cnc , and I love it.
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  #29  
Old 01-24-2022, 02:11 PM
pufferfish pufferfish is offline
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Default Re: 1/10 Mining Dump Truck

Well, after planning, the doing was a simple turning job

the guard rings are very small.


seals are simple o-rings




big thread on the lid






Fits perfect






To lock the trough in open state for working on the hydraulics are at the big ones simple Us wich will hook on the back plate.

So do i


Works


Here you can see the last part of the cylinder with the flange. both from stainless to be able to weld. All other parts are from aluminium.



the original have a maximum tilt angle of 53°.

almost



later, after some test and measuring, i'm able to raise the size of the guard-rings. that brings a lot more stability.
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Last edited by pufferfish; 01-24-2022 at 02:13 PM.
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  #30  
Old 01-25-2022, 04:03 PM
pufferfish pufferfish is offline
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Default Re: 1/10 Mining Dump Truck

Last post so far

The exciting parts are done. Followed by things i have to do.

Hydraulic arrangement


Many stainless sheets .3mm or .5 mm are cut, bend and welded to build the front.



The bonnet is parted.







on the back the massive airfilters


tank


battery tray


after all the yellow some belaz blue



and, tradional for me, the last thing: The cabin







Et voila. Almost completed




Actually the one and only clip with my Belaz 7540 Mining Dumper working.

(Don't mind the unscale Loader )

Here it is


Now it's waiting for Spring to make a better clip and get some interieur into to the cabin.



Thanks for your Interest.

Maybe you'll watching my thread to build a more scale Loader
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  #31  
Old 01-25-2022, 06:12 PM
bigpipespete bigpipespete is offline
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Default Re: 1/10 Mining Dump Truck

Yours looks better than the real thing. Fantastic build.
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  #32  
Old 01-25-2022, 07:15 PM
Tgrzes Tgrzes is offline
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Default Re: 1/10 Mining Dump Truck

Nicely done! I always enjoy the imagination and skill involved with scratch builds.
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  #33  
Old 01-25-2022, 09:25 PM
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frizzen frizzen is offline
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Default Re: 1/10 Mining Dump Truck

Beautiful machining work on everything!

Even the latches for engine cowls are amazing
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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...
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  #34  
Old 07-16-2022, 02:29 AM
pufferfish pufferfish is offline
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Default Re: 1/10 Mining Dump Truck

Hi,

A usual method to move an excavator is to use a dumper and transport
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  #35  
Old 11-13-2022, 12:53 PM
pufferfish pufferfish is offline
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Default Re: 1/10 Mining Dump Truck

Hi there,

some months later......
(during them i've built a 1/10 stainless steel land rover forward control)
....... the dumper needs an improvement of his drive train.
fully loaded it was a bit weak.
After a detail research i've found some issues. The rims are able to get contact with the axle and the motors don't get enough power to work properly.

First attempt to seperate rims and axles are a gliding tape glued onto the axles. Unfortunately works is not good.

Second attempt are these brass rings with the function of very small bearings.





After a couple of new escs i've found the working solution with seperate hobbywing 1080 for each motor.

Now the dumper can work in soft and hilly terrain too.



traces in the sand (including a footstep in size 16)
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  #36  
Old 11-16-2022, 06:26 PM
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frizzen frizzen is offline
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Default Re: 1/10 Mining Dump Truck

That came out really awesome!

Your mining truck is a beast
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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...
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  #37  
Old 11-17-2022, 05:45 PM
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Default Re: 1/10 Mining Dump Truck

Impressive work, I really like the working drum brakes.


-Shawn-
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