Rauce
Ultra Member
So I stumbled upon a deal on a used clearpath servo motor. Model CPM-MCVC-N1433S-RLN. Going to go pick it up later this week.
This motor will deliver 2.3hp continuous and 6.7hp peak running off single phase 230v power. Comes with a regenerative resistor unit as well for increased braking capability.
I plan to use this in my hendey lathe in place of the VFD and 3hp 1750rpm AC motor that I got with the machine.
I’ve been studying the control modes for the motor and there are two modes that make sense for use in a lathe.
The first is what they call manual velocity control. This would have an on/off switch to enable or disable motor and speed is controlled with a quadrature encoder. Direction can be controlled but only as part of the encoder signal. So turn the encoder clockwise and the motor turns one way or turn the encoder ccw and the motor turns the other way. It has the option to recall the last setting when enabled or to always start at 0rpm.
The second applicable mode is Follow Digital Velocity Command. In this mode Enable and Disable works the same way. Where it differs is that speed is controlled by a PWM or Fequency signal on one input and direction of rotation is controlled on another.
While the manual velocity control mode would work it doesn’t seem ideal to me. I’d much prefer to be able control direction of rotation seperate from speed and be able to set a speed with the motor disabled.
The follow digital velocity command mode would deliver what I want but the execution is the part I’m unsure of. I would need a way to deliver either a PWM or frequency signal and a display to see what I’ve set it to.
I have a feeling that this is something that can be done with an arduino? In a perfect world I would be able to display the theoretical spindle speed on the display for the frequency generating device. This would be calculated by the relationship of frequency to motor speed and then to spindle speed.
This motor will deliver 2.3hp continuous and 6.7hp peak running off single phase 230v power. Comes with a regenerative resistor unit as well for increased braking capability.
I plan to use this in my hendey lathe in place of the VFD and 3hp 1750rpm AC motor that I got with the machine.
I’ve been studying the control modes for the motor and there are two modes that make sense for use in a lathe.
The first is what they call manual velocity control. This would have an on/off switch to enable or disable motor and speed is controlled with a quadrature encoder. Direction can be controlled but only as part of the encoder signal. So turn the encoder clockwise and the motor turns one way or turn the encoder ccw and the motor turns the other way. It has the option to recall the last setting when enabled or to always start at 0rpm.
The second applicable mode is Follow Digital Velocity Command. In this mode Enable and Disable works the same way. Where it differs is that speed is controlled by a PWM or Fequency signal on one input and direction of rotation is controlled on another.
While the manual velocity control mode would work it doesn’t seem ideal to me. I’d much prefer to be able control direction of rotation seperate from speed and be able to set a speed with the motor disabled.
The follow digital velocity command mode would deliver what I want but the execution is the part I’m unsure of. I would need a way to deliver either a PWM or frequency signal and a display to see what I’ve set it to.
I have a feeling that this is something that can be done with an arduino? In a perfect world I would be able to display the theoretical spindle speed on the display for the frequency generating device. This would be calculated by the relationship of frequency to motor speed and then to spindle speed.