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Re: Take the "Bane" out of your Banebot P60s - Solution to Banebot P60 Weaknesses
Brake/Coast only ever enters the picture when you're sending a 0% command to a Jaguar/Victor. Then it will short or open the motor leads. If you're sending any command outside of the deadband, then one of the lower legs is always on and you're effectively braking during the low period of the PWM cycle.
Besides which, have you tried backdriving one of these things even in coast mode? The friction losses and cogging torque of the motor make a pretty effective brake all on their own at these ratios.
On the other hand, the huge ratio means you're mostly just pushing against the friction of the gearbox itself. So the motor operates a lot closer to no-load speeds than you might think. So "slowly" ramping down the voltage will translate pretty directly into slowly ramping down the speed of the load.
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The difficult we do today; the impossible we do tomorrow. Miracles by appointment only.
Lone Star Regional Troubleshooter
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