Hey all, just wanted to share a “fix” i had for my VFD spindle.
I recently tuned/tweaked my setup to make the steppers motors run all the time, but it generated enough noise to cause the spindle to slowly move 90-111rpm when “off” (M3 S0). Steppers are pretty noisy, so decided to move to PWM to solve my problem.
Take a look at this little module on amazon/ebay/whatever. “PWM to Voltage Module 0%-100% PWM to 0-10V Voltage Suitable for Signal Interface Switching for PLC or Other Industrial Control Boards”. It’s 9 bucks and totally solves the issue. Uses PWM input to convert to 0-10V, adjustable.
I originally had the Spindle controller on my DigitalLoggers AC relay, but the controller takes waaaay too long to turn on. So this has worked out better.