High Torque Subtractors

Question

I would like to use a subtractor in my next RC LEGO tank, as it enables the vehicle to turn on the move, as opposed to stopping and then turning.

Unfortunately, the subtractors I have tested so far cannot withstand the torque of heavy vehicles, which either causes the subtractor to break apart, or the differentials/gears to grind.

Does anyone know any subtractor designs which are able to deal with high tension/torque/stress levels so that enormous vehicles can still use them? 3kg-5kg tolerance would be ideal.

Alexander O'Mara · Answer 1 · 2018-12-20T19:04:17.947

6

It sounds like you need a stronger differential.

Might I suggest this design by Nazgarot:

If you make two, you can build a big and sturdy subtractor like this (probably customizing the gear ratios to your requirements, the right gearing could also remove the need for a PF switch):

Here's a video of it in action:

edited Dec 20 '18 at 19:04

answered Dec 13 '18 at 01:40

Alexander O'Mara

13,302
4
43
97

3

Very nice answer. You deserve to get the six-sided hat for this. :) – jncraton Dec 13 '18 at 02:58
Excellent. I've come back to this question like 4 times hoping someone had finally figured out a decent answer. – MindS1 Dec 13 '18 at 15:06

High Torque Subtractors

1 Answers1