Mach3 VFD Control Board

Mach3 VariableFrequency Drive (VFD) Board

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variable-frequency drive (VFD) is a system for controlling the rotational speed of an alternating current (AC) electric motorby controlling the frequency of the electrical power supplied to the motor.

Mach3 VFD Board is used for the purpose of controlling the speed of the spindle through Mach3 CNC Software with driving your VFD. You can easily change the speed of your spindle from Mach3.


Please do the following:



Assign a pin to control the spindle. Below picture shows how to assign pin 8 as output to the spindle control.


Check "Use Spindle Motor Output" and "PWM Control" as shown below

Set the minimum and maximum speeds


Connection to the VFD Control Card


PC Side ---------------------------------------VFD Side


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