VEX motors question

[Matt Krass]

Originally Posted by Alex.Norton

it doesn't make any sense to me to use a separate cable for PWM when the power goes through the controller. I would simply mean needing extra circuitry in the motor that the controller already has.

Since in the code for the vex you specify whether you are using a servo or a motor I could see the third wire being nothing (if the motor doesn't have a feed back loop) for a motor and a feedback loop for the servo because a servo needs 3 wires. They simply used a third wire on the motor so it had the same connector and port.

Just a thought, I don't know a lot about the subject but that makes more sense than have a separate PWM signal.

Your logic makes sense, but when you are poor like me and only have the bare radio kit.... I never saw any way to discern between motor and servo, and variable power to a servo would be...well...odd...I stand by it being PWM and that being used for speed control, but I admit I can't explain why the code allows to select, any ideas on this?