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Unread 28-11-2016, 17:25
rafi rafi is offline
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Talon SRX Magnetic Encoder Cable Issues

We are making a flywheel shooter. The flywheel is powered by a mini-CIM, and has an integrated Talon SRX Magnetic Encoder in a gearbox attached to it. Due to the fact that we have this shooter mounted on a turret, we need to have a long enough encoder cable for it to be able to reach the encoder, no matter where it is in the rotation of the turret. Whenever we test the encoder using a 12" 10-wire ribbon cable that was bought from VEX, the motor runs perfectly. When we use a longer 128" cable that we crimped, which is necessary for the turret, the motor runs at about half the speed we expect and makes a lot of loud grinding-y noises, which we figured are not good. We tested all the crimps and the crimp seems to work. The resistance for the shorter cable read as -0.3 ohms, which I assume means it's about 0. The resistance for the longer cable read as 0.8 ohms.

Our current hypothesis is that the encoder is diverting power from the motor, since they are both connected to the same Talon. We are not really sure why this might be, could anyone give us any ideas on what could be wrong, and how to fix it?
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