Please verify the VFD minimum and maximum settings are appropriate for your motor's duty cycle and cooling setup. I set the minimum speed command to 0.375 Volts, which allows a 90 RPM minimum spindle speed. Note that I have external cooling to allow the motor to safely operate at this low speed. A self-ventilated motor would likely be damaged if operated below 50% of the nameplate speed while under heavy load. |
Please verify the VFD minimum and maximum settings are appropriate for your motor's construction, duty cycle, and cooling setup. I set the minimum speed command to 0.375 Volts, which allows a 90 RPM minimum spindle speed. Note that I have external cooling to allow the motor to safely operate at this low speed. A self-ventilated motor would likely be damaged if operated below 50% of the nameplate speed while under heavy load. |