I have installed a opto isolated relay in my spindle power on off. Do I also need a PWM in order to control spindle speed? What type of PWM do I need. I have a retrofitted Shoptask 3 in 1 machine. Thanks! Jeff in Van Nuys CASimilar Threads: PWM Signal to DC Voltage,Conversion Board for Speed Control of Spindle/Mach/CncJust IN- < PWM Signal to DC Voltage> Conversion Board for Speed Control of Spindle / Mach Mach 3 VFD speed control X3 / Mach 3 / Spindle Speed BPSeriesI / Centroid control- Spindle speed all out of whack with speed dial?
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