Hi Peter,
I'm busy with a similar application for a second spindle on a machine. I bought a PWM to voltage converter, I used stepgen.04, loaded the firmware, all good. So I followed your instructions given above, and have it working to 1500rpm. The maximum speed of this spindle is 3000rpm, but I need to do some scaling.
My current pwmgen.scale is setp to 2520. When I run command at 1500RPM, the actual RPM is 1500... My output voltage from the pwm to voltage converter unit is 3.97v. But, ...:
2400rpm command gives 8.6v, and actual spindle speed = 3000rpm.
1000rpm command gives me 1.65v, actual spindle speed = 600rpm
700rpm command gives me 0.337v, and actual spindle speed = 120rpm.
under that the spindle stops. Unfortunately I don't have any documentation available on this drive.
It's a XMT_Driver_1500. I think it's a seig product. But I don't think there's a way to adjust parameters for a minimum speed command and maximum speed command value.
If there's a way to scale my PWMgen output to such a way to say the value currently written for 700rpm should actually be 100rpm, and max value, the command currently written for 2400rpm should actually be 3000 rpm. I'm a bit lost for ideas here... not sure if there's a component available to manipulate this? Or should I just write my own component to do this? And increment it by 100rpm?
What would you do in this situation?
