RC Truck and Construction - Liebherr R984 1:14

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- - Liebherr R984 1:14 (https://www.rctruckandconstruction.com/showthread.php?t=11149)

Re: Liebherr R984 1:14

thanks, i don't know what part you refer, but all the lower superstructure weighs about 15 Kg

the last photos and one test video
https://i.imgur.com/hRBJnpV.jpg
https://i.imgur.com/dnMPxtv.jpg
https://i.imgur.com/aCIfSJm.jpg
https://i.imgur.com/QLYuxS9.jpg

https://youtu.be/ZSXQkJDTfbQ

https://i.imgur.com/Gejjkig.jpg
https://i.imgur.com/7lj2xPZ.jpg
https://i.imgur.com/0jiAEjw.jpg
https://i.imgur.com/9QnQSzZ.jpg
https://i.imgur.com/rpnLr2P.jpg
https://i.imgur.com/IokRF0e.jpg
https://i.imgur.com/UmRbnJU.jpg

https://www.youtube.com/watch?v=DQ55BgwHt-Q

this is the counterweight of the machine, this is only the model 3d printed to obtain the final part from casting
The first thing to decide is the material, in this case I have chosen to make the counterweight, lead, by weight it would be totally out of scale, but I want to give a certain touch of "forcefulness" to the machine, besides, to remove there is always time
https://i.imgur.com/2Ez2YKE.jpg
next part, letters and details, at this time i thought to use 3d printed part, but sure i have troubles in cast, no way, plan B
https://i.imgur.com/1zw2DoY.jpg

the cast
https://i.imgur.com/nf2WcYH.jpg
https://i.imgur.com/QG5lFYZ.jpg
https://i.imgur.com/LcALpu6.jpg
https://i.imgur.com/a5uavPa.jpg
https://i.imgur.com/2G63Abc.jpg
https://i.imgur.com/nFksgHT.jpg
https://i.imgur.com/HOA3yRG.jpg
https://i.imgur.com/VxXVlC7.jpg
I have to pause.. a little problem
https://i.imgur.com/61uxsP0.jpg
https://i.imgur.com/OANBgUX.jpg
a rebob (i don´t know if is the correct word, a superficial fail) i have to repair, first i have to prepare the surface and after use a epoxy putty to fill the fail and and a lot of sanding by hand...
https://i.imgur.com/IPxqpGp.jpg
... or not, better to use the machines
https://i.imgur.com/xUmSW55.jpg
https://i.imgur.com/mbohBOU.jpg
https://i.imgur.com/BMonE14.jpg

Re: Liebherr R984 1:14

Re: Liebherr R984 1:14

Re: Liebherr R984 1:14

reinforcements at the tip of the arm
https://i.imgur.com/VZWDNbh.jpg
https://i.imgur.com/BfdvaP1.jpg

and the look of the set presented
https://i.imgur.com/Njxe6aN.jpg

the following is the joining of the hydraulics ram in the boom, I use a piece of brass and I will mechanize it to shape
https://i.imgur.com/C2iKs3m.jpg
https://i.imgur.com/RjqLD9D.jpg
https://i.imgur.com/b2mgG0R.jpg

this is the set presented
https://i.imgur.com/Q4EQ8jr.jpg
https://i.imgur.com/1j656iS.jpg

The next piece makes the pivot point of the pistons that move the arm, this piece is taken out of casting brass
https://i.imgur.com/Lnu5lbv.jpg

Another thing I have done is accentuate the detail of the welds on both the sides of the machine, using copper wire and solder
https://i.imgur.com/qK7RGOf.jpg
https://i.imgur.com/T7WPP6l.jpg
https://i.imgur.com/Y0DJdj4.jpg

and one of the last steps would be to fill as previously mentioned with resin and filler to give more rigidity to the set, filling gaps and fixing some internal parts
https://i.imgur.com/gCsXE3P.jpg

and here once the resin dries
https://i.imgur.com/wTTmgbT.jpg
https://i.imgur.com/KhMG487.jpg

and finally I show you the anchoring of the counterweight, given the weight of this part I had to devise a way to assemble and disassemble, the machine will be too heavy, I need to subtract weight to be able to transport it more easily and for maintenance labours . The system is relatively simple. I leave you some photos and a small video of the operation
https://i.imgur.com/WmCfZT2.jpg
https://i.imgur.com/uNIjGvG.jpg
https://i.imgur.com/Ww8AOIb.jpg
https://i.imgur.com/rkst7br.jpg
https://i.imgur.com/ij0i0HT.jpg

https://www.youtube.com/watch?v=2aPF...ature=youtu.be

Re: Liebherr R984 1:14

Once time the mechanical part is "almost ready" i start to show the hydraulic parts and begin with the rams (it's a complex parts), the bodies of cylinders are made in steel and the ends and tips are made in brass, in all of them, the lower part is welded and the upper part is threaded (M2 arm and M3 boom and bucket)

https://i.imgur.com/n8iXULl.jpg

https://i.imgur.com/XrSUCFX.jpg

https://i.imgur.com/Gj98rTh.jpg

https://i.imgur.com/MDD8Y9c.jpg

https://i.imgur.com/TI8DcTm.jpg

https://i.imgur.com/jK8qekh.jpg

https://i.imgur.com/Pn3BVbT.jpg

here some machined parts
https://i.imgur.com/aGu2OCA.jpg

https://i.imgur.com/VDfj5ie.jpg

here, the cylinders with the lower end welded
https://i.imgur.com/C80L6ak.jpg

now the cylinders more advanced are the boom cylinders and the bucket, the following will be the arm cylinders, but like a little advance i show some parts of the arm cylinders

future fittings in the head of the cylinder
https://i.imgur.com/27Q1CEz.jpg

https://i.imgur.com/Cc2IRi8.jpg

https://i.imgur.com/fWQl4iA.jpg

https://i.imgur.com/MwyGASR.jpg

At this point, I continued with the fittings, as I didn't like any market option, I also decided machining these pieces, another difficulty more .. are turned from 3mm brass tube
https://i.imgur.com/pCNlfgU.jpg

https://i.imgur.com/Vnf0qF3.jpg

https://i.imgur.com/ixb9tDf.jpg

and a little video
https://www.youtube.com/watch?v=oMl4...ature=youtu.be

Also i will need angled fittings, so I made a small tool to bend the tubes
https://i.imgur.com/QztkVxX.jpg

https://i.imgur.com/8XN9CpH.jpg

here one of both hydraulic rams on the boom, almost finished (only need the paint)
https://i.imgur.com/F4EpAWS.jpg

and naturally, I have to do pressure tests, to see if all the parts hold up well :diable:
This is the pressure equipment, which helps me to make static pressure tests perfectly
https://i.imgur.com/Se1E4FC.jpg

a small video (the small leaks that are seen .. they do not have any importance)
https://www.youtube.com/watch?v=1grk...ature=youtu.be

and the other end
https://i.imgur.com/dxe9kCc.jpg

and now is the bucket cylinder time, photos
https://i.imgur.com/rSHmKaY.jpg

https://i.imgur.com/HDztwDW.jpg

Re: Liebherr R984 1:14

https://i.imgur.com/2ii5B5R.jpg
https://i.imgur.com/yfJPBd8.jpg
https://i.imgur.com/JdquGTn.jpg
https://i.imgur.com/S5WWjbc.jpg

This photo is a small sample of the machining of tools and (I don't know how to call this) the bolt heads that block the hydraulic cylinders and prevent them from leaving their housing

https://i.imgur.com/WgoCpTd.jpg

In this case, I needed to make the holes in that piece to place the locking tab

https://i.imgur.com/HV0qLxE.jpg
https://i.imgur.com/x55Tte6.jpg

and these are some of the heads of those bolts that I mentioned before, ready to paint (I hate painting)

https://i.imgur.com/NsrSLSP.jpg

Before moving on to the painting phase, I still had to install some type of wear protector that has the bucket behind it ... I don't know the exact name of this piece, there are a lot of types and it's difficult choose, in fact at the beginning select a model and at the last moment, change to this one, that was more complex, but hey, in the end both would have been good
I'm going to put these bars

https://i.imgur.com/D0I7h71.jpg

here
https://i.imgur.com/jlAdLBe.jpg

This part will seem silly, but it has cost me a lot to do it, since the bars are very close, in the end I did it by spot welding (a friend lent me an industrial welder) sorry i didn´t take photos after the welding

Now, we go to the painting:
All the pieces have several layers of primer and the same layers of paint

https://i.imgur.com/cgokXVS.jpg
https://i.imgur.com/pTW5BQn.jpg
https://i.imgur.com/jgj7w4p.jpg

https://i.imgur.com/HwvPLYs.jpg
https://i.imgur.com/auwNJXX.jpg
https://i.imgur.com/WGkCGNz.jpg
https://i.imgur.com/zv8792n.jpg
https://i.imgur.com/dWatm18.jpg
https://i.imgur.com/b6Re3vb.jpg

Now it's the turn of the bucket piston
https://i.imgur.com/OnlNFc0.jpg
https://i.imgur.com/esihHaj.jpg

and once without masking tape
https://i.imgur.com/yvcIDaR.jpg
https://i.imgur.com/6oPXIL3.jpg
https://i.imgur.com/G72423f.jpg
https://i.imgur.com/RmpoR8s.jpg

The next thing is to mount the "denture" to the bucket
https://i.imgur.com/hcY7J4r.jpg
https://i.imgur.com/lYV5crF.jpg

Re: Liebherr R984 1:14

Re: Liebherr R984 1:14

but before showing you how they are once painted, I am going to show you a detail that would practically go unnoticed and since I have put it .. that is seen, first I describe it a bit and then, I show the photos and everything is clarified. These pieces, are a simulation of the closures of the fittings in the pistons, a kind of flange, they are not functional, they are made of resin and they are glued, but they give some realism to the whole

https://i.imgur.com/jWx3trj.jpg

in microscope
https://i.imgur.com/qUruOID.jpg
https://i.imgur.com/5VCM8aF.jpg

and now, the paint
https://i.imgur.com/8tajl19.jpg
https://i.imgur.com/hupxWmd.jpg
https://i.imgur.com/5MXoPyN.jpg
https://i.imgur.com/3N76Plh.jpg
https://i.imgur.com/OqkxgB6.jpg

these are the heads of the locking bolts together with their housings and the plates that make the closure
https://i.imgur.com/SUSFjl7.jpg
https://i.imgur.com/XSiANhJ.jpg
https://i.imgur.com/MYWqvWF.jpg
https://i.imgur.com/qHXW8So.jpg
https://i.imgur.com/VHu3pPz.jpg

These are details into the tracks, I suppose that in the real machine they would be service covers for maintenance of the track tensioning system
https://i.imgur.com/lij8I5N.jpg
https://i.imgur.com/l6Ui6Vs.jpg
https://i.imgur.com/7GkpC4M.jpg
https://i.imgur.com/dSHC07W.jpg
https://i.imgur.com/xaxRbxC.jpg
https://i.imgur.com/qG4ugSa.jpg
https://i.imgur.com/qnXhdH8.jpg

pipe supports on the arm
https://i.imgur.com/dwC76GM.jpg
https://i.imgur.com/WGfcHN0.jpg
https://i.imgur.com/LpJ6jF2.jpg

some photos of the tank and fittings, it was going to be a temporary tank, but .. as usual, for now I will keep it that way, and I will change it in the future .. or not: o) the tank has an oil filter incorporated
https://i.imgur.com/c7LBllh.jpg
https://i.imgur.com/TOdPiJC.jpg
https://i.imgur.com/dQ5J0qc.jpg
https://i.imgur.com/d2WSZ8G.jpg

I'm going to place photos from the lower structure (tracks) to the upper part (turret) to follow a certain order
https://i.imgur.com/oO4I11u.jpg
https://i.imgur.com/Tu5DQSt.jpg
https://i.imgur.com/99tlXgy.jpg

Re: Liebherr R984 1:14

and the hydraulic fittings
https://i.imgur.com/h3BaMgl.jpg
https://i.imgur.com/wuw46h1.jpg
https://i.imgur.com/3CEEmVL.jpg

and the hydraulic part, here I will stop a little more, since this is not usually seen very often, I have already mentioned that the hydraulic system is of very high pressure, it reaches up to 200 bar, each element has been tested individually to ensure its operation at mention pressure, the pump sends the oil to an oil accumulator, pressurized to 70 bars of gas pressure, that is, any oil flow that does not reach that pressure, would not enter in this accumulator.At the output of the pump, we also have, in parallel, a pressure limiting valve, set at 200 bars if the pressure in the system rises above that value, it sends the excess to the tank passing through the filter previously and a pressure sensor, this element It controls the pressure at the pump outlet, and I am going to use it to control what pressure I want the system to work at, broadly speaking, with the station I send a signal to a microcontroller that is in the machine and it compares the signal that I send you with the transmitter, and the signal that comes from the sensor, if the control signal is less than the sensor signal, it does nothing, but if it is the other way around, it turns on the pump until the pressure in the circuit is the desired one. Useful pressure ranges from 80 to 200bar, at less than 80 bar the sensor does not measure well and over 200 bar the pressure limiting valve trips
Photos:
the sensor
https://i.imgur.com/BW4FRvu.jpg
various elements, pump, pressure limiter, tank
https://i.imgur.com/kaaKch5.jpg

this is the tank, only with the gas precharge pressure (70 bar)
https://i.imgur.com/aQEv70P.jpg

https://i.imgur.com/QndlDtq.jpg
https://i.imgur.com/Ea5ZaHH.jpg
https://i.imgur.com/OrQWyr5.jpg
https://i.imgur.com/sC6WPSe.jpg

some tests already with pressure
https://i.imgur.com/9f47stg.jpg
https://i.imgur.com/40jPa97.jpg

a little a summary video
https://youtu.be/PJko2NQGDLY

in the next step, basically focus on teaching details and painting (as I could best) let's get to it!

I'm going to start with what would be the bodywork, my initial idea was to make a bodywork, like the real ones, with its little doors, accesses and those things, but in the end I had to opt for functionality, the panels are simulated, but .. I think they are quite the hit and I have put in a good amount of detail

The first thing is to calculate the development of the body once unfolded, to pass it later to laser cutting, then I had to prepare a small assembly, since before folding this sheet, I had to mill some small grooves on its surface, which are the that they are going to simulate the separation between the panels of the bodywork, for this I had to prepare a wooden board that acts as a martyr and machine the negative shape of the plate, with this I make sure that it rests flat and everything at the same height , but the endmill (1mm in diameter) can eat more material than it should and split and / or make a through hole, which I don't want either
https://i.imgur.com/CP5Hm5L.jpg
https://i.imgur.com/066LFIM.jpg
https://i.imgur.com/MxU2yOF.jpg
https://i.imgur.com/jiWQj7L.jpg

OK, once the grooves are made, we move on to the folding, here I would like to comment on the "tricky" of the operation, if the folds are not perfectly in place, the body could be higher (losing width) with which it would not enter the machine, since it is very tight or it could also be wider (losing height) this is almost worse, since it would create an interference in height with the workshop components and it would not fit into the structure because it is too wide, it is complicated the issue

https://i.imgur.com/SNqIdgW.jpg
https://i.imgur.com/3o0jqsS.jpg

and here a few more photos
https://i.imgur.com/x5oKBDN.jpg
https://i.imgur.com/NeBYqlT.jpg
https://i.imgur.com/0Gilhm0.jpg
https://i.imgur.com/CFrClp1.jpg
https://i.imgur.com/rZON0Vm.jpg

the handles of some covers on the bodywork and the anchoring of one of the railings
https://i.imgur.com/RSZeo2v.jpg
https://i.imgur.com/olt6ldu.jpg
https://i.imgur.com/O9BP5et.jpg
these covers will be screwed, it is a simple aesthetic detail, but I like how it looked

here once painted
https://i.imgur.com/DmuwxDc.jpg

Re: Liebherr R984 1:14

This would be the handles of the side doors of the body, due to their size, printed in 3D resin (I made several models)
https://i.imgur.com/NDTzvbL.jpg
https://i.imgur.com/ytk9cYs.jpg
https://i.imgur.com/iX7xXS5.jpg
https://i.imgur.com/ztyyjSp.jpg

the caps i showed earlier, ready to install
https://i.imgur.com/h3UWTJd.jpg
https://i.imgur.com/FRbyKrI.jpg

As with the bodywork, I proceed with "the hood" (I don't know what these pieces are called), first it is to take out the development of the pieces to be able to cut them with laser, then to laser cut in 0.5mm stainless steel and fold This time because of their size, I have no choice but to do the folding by hand, it doesn't look so good, but .. it's passable
https://i.imgur.com/O1iXrzz.jpg

once folded and presented
https://i.imgur.com/XBvzN9S.jpg
https://i.imgur.com/fmTIwgu.jpg
https://i.imgur.com/wWUnkHw.jpg

this is its corresponding railing
https://i.imgur.com/Yjrev8G.jpg
https://i.imgur.com/uyEphPZ.jpg

and here already finished and painted
https://i.imgur.com/Tja40XR.jpg
https://i.imgur.com/CGqJarI.jpg

Apart from the grids, there are also mesh plates on the excavator, one on each side, I suppose they will also be ventilation, let's go with them:
For this I made a small tool with the 3D printer, which is attached to the jaw of the milling machine and makes the mesh folds
https://i.imgur.com/cVfUu9D.jpg

I leave a small video that explains it perfectly
http://www.youtube.com/watch?v=j4_8tw9wiyg

https://i.imgur.com/Bm7Oq7Z.jpg
https://i.imgur.com/9d4tJlb.jpg
https://i.imgur.com/tUh8tPK.jpg
https://i.imgur.com/Ag3q0o2.jpg

one thing left to do is finish painting the counterweight
https://i.imgur.com/B9NW8ph.jpg
https://i.imgur.com/M7i4OGy.jpg

We continue with the side walkways and the cabin platform, these structures are made of 1mm stainless steel sheet, tongue and groove to facilitate assembly and then welded

We start from laser cut parts
https://i.imgur.com/uEi05Ax.jpg
and we are assembling them, this in particular is the platform of the cabin
https://i.imgur.com/SVvCgdC.jpg

the side panel of the cab platform, milled for later folding
https://i.imgur.com/99adIAW.jpg
https://i.imgur.com/BuMEmzK.jpg

and this is how it looks
https://i.imgur.com/jAfdG1W.jpg
https://i.imgur.com/C70iNgT.jpg
https://i.imgur.com/HVTPbig.jpg

Re: Liebherr R984 1:14

Re: Liebherr R984 1:14

the result
https://i.imgur.com/bcQKrsC.jpg
https://i.imgur.com/6uQgk0N.jpg
https://i.imgur.com/QWm3gA2.jpg
https://i.imgur.com/dskDSuv.jpg
https://i.imgur.com/WCwu7o9.jpg
https://i.imgur.com/5MtILqW.jpg
https://i.imgur.com/MrPs2cE.jpg
https://i.imgur.com/sQWhIRu.jpg
https://i.imgur.com/Jp0256X.jpg

and once primed
https://i.imgur.com/vhTIknt.jpg
https://i.imgur.com/3Mbk4Cx.jpg

we go with the pieces that join the platform to the oil tank - upper structureTambién parto de unas piezas fresadas en latón
https://i.imgur.com/GlSq7M7.jpg
https://i.imgur.com/b9Q5Rxb.jpg

These pieces are screwed to a 3D printed piece that complements the tank and this printed piece, in turn, is screwed to the tank itself, the platform will later also be screwed to these brass pieces
https://i.imgur.com/ZAxdQEL.jpg
https://i.imgur.com/xBwWugx.jpg
https://i.imgur.com/gYUbE7G.jpg

oil tank with 3D dressing and tank-structure union parts <-> cabin platform
https://i.imgur.com/WEM4zVa.jpg

With this, I would already have the cabin platform attached to the structure, but I also have to join the walkways to the structure, I do that with these pieces, which are screwed from the bottom to the upper structure and to those that will be screwed later. the catwalks

more pieces milled in brass
https://i.imgur.com/VAitwjG.jpg

and once cut and painted
https://i.imgur.com/VBg6CVJ.jpg

I can now install the walkways in their position
https://i.imgur.com/watCyBN.jpg
https://i.imgur.com/O9WUdQI.jpg
https://i.imgur.com/YJtLENd.jpg
https://i.imgur.com/IxugX78.jpg
https://i.imgur.com/JOg7hvi.jpg
https://i.imgur.com/VBWB4OT.jpg
https://i.imgur.com/LEsHceP.jpg
https://i.imgur.com/TkIXiPu.jpg
https://i.imgur.com/bsk84oY.jpg
https://i.imgur.com/gal4riC.jpg

the next step the cabin. This is a piece that carries its complexity and it has taken me more time than I thought and also I have not solved it as I would like ... but hey, my initial idea was to make this piece all of it in metal, the easiest thing for me was to manufacture it with the technique of microfusion (lost wax casting) I have already taught pieces made in this way before, I make a master piece, which I then bury in a special "plaster", heat everything until the piece disappears and then fill the gap that remains with metal

I print the pieces in 3D divided into 4 parts, since they are very large pieces and the cylinders do not fit in any other way
https://i.imgur.com/Kd5wRuS.jpg

Re: Liebherr R984 1:14

mounting the casting trees
https://i.imgur.com/hfn5XN4.jpg

and so they come out after the process
https://i.imgur.com/nkJ4Tl0.jpg

and superimposed to see how they look
https://i.imgur.com/l1mwcnI.jpg

They do not come out perfect, but they are repairable and can be used, but since I think that I will not have time to weld and prepare this cabin, I leave it in "stand by" and look for how to make another cabin, more quickly, for this faster is 3D printing -> FDM 3d printing
https://i.imgur.com/rwOvyy9.jpg
https://i.imgur.com/ENeeOk0.jpg

This is a so-called "special" PLA so that it acquires all its mechanical properties, it requires post-processing a heat treatment, you have to heat the material up to about 80º and leave it there for a couple of hours and then cool
https://i.imgur.com/NBWACDG.jpg

too hot .. to start over again
the cabin
https://i.imgur.com/OBAN9Q5.jpg

the door
https://i.imgur.com/xDw6WQv.jpg

sandpaper, paint and well .. it remains "apparent" is what I like least of the whole machine
https://i.imgur.com/Jx1hczS.jpg
https://i.imgur.com/QkX6xbT.jpg

And at this point I am, I still have to add details, less and less, of course, the driver is also ready, but that will be the last thing I teach, it will be the "icing on the cake"
https://i.imgur.com/HgKZz7O.jpg
https://i.imgur.com/vnTUiGl.jpg
https://i.imgur.com/hnk5FYF.jpg
https://i.imgur.com/nE2c5F5.jpg
https://i.imgur.com/O4g9hA0.jpg

and some test:

caterpillar load test:
https://youtu.be/Z-bA_rgCn94

brute force test:
https://youtu.be/Rbchu3ASgpU
https://youtu.be/8DVwKnUj0wg

and the first videos of the machine, (very clumsy operator, I know)

http://www.youtube.com/watch?v=LuKBsjKK0CU&t

http://www.youtube.com/watch?v=24i7c4hAa8U&t

http://www.youtube.com/watch?v=EJQvPJ-JAJc&t

some photos of the bucket (it is the largest that the machine mounts, 8m3)
https://i.imgur.com/xA5xAiB.jpg
https://i.imgur.com/6QxYhiP.jpg
https://i.imgur.com/hKY3Fbi.jpg

And a small mod for the radio, I use a taranis 9EX and it has a 2Ah NiMh battery but as it had been on the shelf for several years, when I needed the battery it was almost dead, it could not hold anything, so Instead of buying another battery packs, I have put an 8-element battery holder in it and put some rechargeable batteries with a higher capacity of 2.5Ah and if necessary, I could put even alkaline batteries
https://i.imgur.com/7c9UY0y.jpg
https://i.imgur.com/Lnpcqus.jpg

and to end i leave a pair of videos showing how i mod my radio to add 4D joystick in the original /M9 R sticks

in the first video show how the original 4D joystick works and how to disassemble
https://www.youtube.com/watch?v=JK_1...nnel=tessenCNC

in the second (and third) video show how i install in the radio, and how to
https://www.youtube.com/watch?v=LGgX...nnel=tessenCNC

best regards!