Runner4404spd,
To the best of my lurker knowledge it is a fundamental requirement that the encoders be fed back to the 320's as the GREX only sends a step and direction "request" not "instructions", the GREX says move 2 steps CW and then the 320 has to calculate the control signals to actually move the motor based on feedback to the 320. If the 320 didn't get any feedback it would never know when it had achieved the position as the GREX can't tell it as it only sends requests for movement (in actual fact i think the GREX and 320 talk back on forth but i think the messages are GREX sends new step and direction and the 320 sends back move complete)
The whole function of the GREX, as i understand things, is that it produces better step and direction signals.
I think sending the encoders the GREX will tighten up the tolerances as currently errors less the 320's error tolerance won't be noticed as the only error signal the 320's provide is in tolerance/ out tolerance. |