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Is this possible?
I know this does not exactly fit all the facts, but it may explain some of them and you may think back and revise your telling of the story after you think about this possibility.
Could you possibly have the motors wires such that you have the M- sides of the motors flip-flop (M- from the right Victor is hooked to the wire from the LEFT moto lead and M- from the left Victor is hooked to the wire from the RIGHT motor lead?
How about haveing the M+'s flip-flopped?
In either of these cases you may get some strange results that could blow your Victors depending on the phase of the two chopped motor pulses.
The H-bridge has some diodes to dump the current from the motor when the motor is acting like a generator (say when you let off the joysticks rapidly).
I am thinking that if you have the H bridges confused you may be bypassing some of the protective diodes.
As to why always the right side, could it be that you always were turning the same way during your demo?
I don't know if I am just making this up or if I am on to something, but it you can check it out in any case.
Joe J.
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