Hood,
Correct, the motor and controller have a predefined operating range programmed in the controller which is 400-6000rpm... I set the pulley configuration in mach to a 1:1 ratio and those rpm min/max settings.
From my paper graphing it appears that the controller is closer to linear as it gets closer to max rpm.
The biggest error is closest to minimum rpm. I made adjustments in motor tuning to try starting from the bottom and working my way up and as I expected from my findings, when I tuned the min rpm 400 to function properly, commanding higher rpm was off by a much greater margin then when starting from the top and tuning down.
This leads me to believe that the controller wants a non linear voltage curve specifically early on in the lower rpm range and then closer to linear in the upper rpm range.
Am I explaining it properly? Am I making any sense to you?
Please let me know your thoughts!
Thanks,
Chris