pic: Vex Teaser: What's Art been up to lately?

[artdutra04]

Originally Posted by Jay H 237

Are you going to set this frame up as two or four wheel drive? Or do you just have other plans?

Be sure to post pics of the finished project.

This was mostly just an idea concept of how to simply and efficiently use a worm-gear drive in a small compact space, although I do have enough motors, motor mounting clips, and worm gears to make a 4WD robot using the worm gears.

The motor here has a fairly high amount of torque for something it's size. Under a moderate load it runs at about 2,500 rpm, which is geared down through the worm gear 36:1 to about 69.4 rpm. Just to see how powerful it was, I geared it down an additional stage (using two 60t and two 12t gears, so as to split the load between them) using a 5:1 reduction. It was practically impossible to stop the output shaft of the stump-pulling second reduction.

At the moment I am working on a much more complicated design that mechanically will calculate the difference between two input shafts. For example if both shafts were rotating CCW at the same RPM, the difference between the two would be zero. But if the two input shafts were moving at different speeds the output shaft would rotate in one direction (CW if shaft A is faster, and CCW is shaft B is faster) at a speed proportional to the difference of the two shafts.