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About jyd80

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  1. This was indeed a challenge! After several attempts, I ended up using a "hinge" like in an articulated hauler or frontloader. This is why the turret can only turn 180° and not 360°, this was a compromise between functionality and build: (screenshot from the instructions. The vertical arrow shows the transmission going through the hinge. The second mechanism, on the right, is for the steering.)
  2. Hi there, Here is a MOC I have been working on during 2020. I just completed the instructions (available at Rebrickable), which was the occasion to give it the final touch. It is a one set MOC, made of only parts from the 42078 Mack Anthem. It features a wheeled excavator and a trailer: Features of the excavator: Steering with HOG from the back Manual stabilizers Front blade with mini-LA, controlled from the back 180° rotation of the turret Articulated boom, controlled from the turret (2 LA + 1 mini-LA) L6 fake engine in the turret, driven from the rear train (with differential), with a transmission going through the turret Openable cabin door and motor hood Features of the trailer: Tipping of the bed (via gear rack) In the end there are quite some parts left, but very little gears. Here are a few more detailed pictures: And a short video: Hope you will like it!
  3. Yes, there is a factor of 1/2 (+ another 8/24 reduction), so that the final rotations in the drive train are 28.33, 36.67, 65, and 101.67, respectively. No, just because there was a crane. I'm not sure such a model exists in real... I just wanted to find a use of that M motor :) The A model is a four wheel drive, but there are only two differentials (the A model does not have a central one). Since I used one for coupling the motors, I could only do a two-wheel drive.
  4. Dear all, With the arrival of the new Volvo set, I felt like rebuilding my old 42030 front loader. The problem was that I still had a MOC built, standing in the cupboard since 2016 :s So I finally built some instructions for it (available at Rebrickable), and made a short video. Here is a presentation. The C-Model is a Jeep-like car (with Volvo colors ;) ) As the A model, it is fully motorized. The L and XL motors are connected to the transmission, and the servomotor ensures the steering (with Ackermann geometry, and working steering wheel): The two driving motors are connected by a differential, which allows combining their rotations. If we note x = 220 rpm the speed of the XL motor and y = 390 rpm the speed of the L motor), we can emulate 4 gears: L forward, XL backward: V = y - x = 390 - 220 = 170 rpm, XL forward, L off: V = y = 220 rpm, L forward, XL off: V = 390 rpm, XL forward, L forward: V = 390 + 220 = 610 rpm. The differential is also connected to a V6 fake engine, and the rear axle is pendular: Finally, the M motor is used to power a crane: Here is a small video to show it in action: Hope you like it!
  5. Thank you all for the positive feedback! As for the steering wheel: yes, I did spent some time on this part, much more than on the transmission! But I could not come with a way to have the wheel not vertical. There is just not enough parts! Another frustration is the front: I tried to have a hood that is not fully horizontal. I could make one, but using some of the parts of the exhaust. I then realised that this very simple pipe gives a lot of identity to the model, more than the hood... si I kept it. B-models are a lot about compromises!
  6. Hi there, Just made this simple alternate from the 42102 Mini Claas Xerion: It features a working steering wheel (using a direction with links, unlike the A model), and a working engine with a rear transmission. The LA holder is used as a cylinder and the piston uses the same technique as introduced in the 9393-B model. Building instructions are available on Rebrickable.
  7. Hi, I am very happy you enjoyed the instructions! I will look into the errors and fix them. Normally the mpd file should open with stud.io, at least it worked on my machine but will double-check with the uploaded version. I did not use stud.io in the end because I was not happy with the resolution of images in the PDF output and went back to LDpub. By the way, I considered making it into a premium MOC, but given that it took me 2 years to generate those instructions, I don't think it will economically be worth it ;) It also very satisfying and rewarding to know that others thought it was of interest enough to spend time building it. Next is a jeep model made of 42030... first have to remove dust :)
  8. Hi there, just to mention that I finally completed the instructions for this MOC! They can be found on Rebrickable: https://rebrickable.com/mocs/MOC-20569/alter-lego/8070-alternate-formula-1/#comments Enjoy :)
  9. Hi, Thanks a lot for creating this dedicated forum! Some time ago I made this post which I think could be move here! Thanks a lot!
  10. Hi, thanks for your interest. I'm unfortunately not finished with the instructions (been working on other projets :s), but the plan is still to produce some (model is still built!).
  11. Hi, I know this is strange, but I just come to see your message now, more than a year after :s I was absolutely not aware that the MOC was removed from Rebrickable (dunno what has happened :s). I have re-uploaded it: http://www.alter-lego.org/entries/technic/Formula1-42048/Formula1-42048-instructions.pdf Instructions for my MOCs are also available from my website (www.alter-lego.org). Many thanks to all of you for the nice comments, and my sincere apology for this accidental disappearance.
  12. Yes, https://rebrickable.com/mocs/MOC-14888/alter-lego/c-harv3st3r/, and the Ev3 program can be downloaded from there http://www.alter-lego.org/en/entries/mindstorm/C-HARV3ST3R/C-HARV3ST3R-31313.html . Any comment welcome!
  13. Hi Eurobrick folks, I would like to present my first Mindstorm Ev3 creation: a combine harvester, which I named C-HARV3ST3R, following the Ev3 terminology. It is more than a year that the project was completed, and it stood for some time on a shelf before I finally made instructions (soon on Rebrickable). I then take the opportunity to present it here: It is remote controlled with the IR beacon, including steering and raising the unloader using the middle button. The header can be raised using a lever on the right side. There are two positions: when down (harvesting mode), the small wheels drive the reel. When up (driving mode), the reel does not turn anymore, and a lever push the touch sensor. The program can therefore "know" whether we are in driving or harvesting mode, based on the state of the touch sensor. The two modes differer by the following: in harvesting mode, the combine harvester drives more slowly and no reverse driving is allowed. In addition, a counter records how much we have harvested, a gauge (in %) is displayed on the screen at the top of the machine (where the actual tank is on real machines). When the tank is full, no further move is allowed and a "bip" is emitted. One need to either go in driving mode, or to unload the harvest by raising the unloader. In driving mode, the combine harvester moves faster and can move reverse (slow speed, emitting a warning "bip"). But a video is maybe better than words: Finally, just a few more pics: Hope you like it!