Re: [CAD_CAM_EDM_DRO] Problems in Timing Belt drive system in 6WD robot

KM6VV wrote:

> Sorry for the cross-posting,
>
> I'm having problems with the timing belt drive system in a 6WD robot I'm
> building for Robomagellan competition in the upcoming Robogames.
> (Mechanical design courtesy DPA).
>
>

Our ASME student group built a mud competition car some years ago that
was 6 wheel drive. It was impossible to turn on hard surfaces, but worked
OK on mud. The fix was to put shims on the middle axle, so it rocked
slightly
front/back or a flat, level surface. This reduced tire pressure on the
front and rear axle enough so you could turn it well on pavement.

The axles were on pillow blocks bolted to the frame, so it was a half-hour
fix.

Your vehicle has the same problem, lack of a differential between the
wheels. Some wheels turn faster than others due to the dynamics of
rounding a corner. At the very least, the middle wheels are at a smaller
radius of the turn than the front and back.

Jon