Phil wrote:
Would it not be a good idea to have a brake somewhere near the green
ball-bearings so that when the "diff" disengaged the left-hand track
is stopped? In one of my many "robot" variants I had a version that
had 2 tracks, steered by cutting the power to 1 track rather than
using a H bridge to lock up the unpowered track. I found that the
vehicle still wanted to go in a straight line even though that ment
turning over the unpowered motor.
Correct. If you simply cut the power to the inside track, then most
tanks will still want to travel in a straight line as the powered track
drives along and the inside track free-wheels. To improve turning, you
need to brake the inside track, either using a mechanical brake or an
electrical brake by shorting the motor leads together as is done in an
H-bridge using FETs and the MAG Speed Control using relays.
Frank P.
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