Hi all,
recently when starting a cut, the spindle goes to max speed on it,s own uncontrolably. This is new and was ok before.
I have Mach3 sending the spindle speed signal to my VFD automatically. When I measure the voltage sent by Mach to the VFD I get 10 volts (max voltage).
All I can do on the Mach3 screen is start or stop the spindle, all other function won,t work ie: I can set a speed but the spindle stays at max speed (24,000)
I tried to calibrate the spindle using the Function cfg,g but nothing works there.
I connected the pot on the VFD and I,m able to control the speed but I would like to go back to controlling the spindle using inputs from Mach3.
Any help on this would be greatly appreciated thanks

Check you have the correct pulley selected and it has the correct values.