In the motor outputs, the spindle should be set to pin number 3. This is also the output terminal number 3 (O3). In Mach3: Select [Config], select [Ports and Pins], and select [Spindle Setup] page in the popup dialog box. In the Motor Control box, check Use Spindle Motor Output and select PWM Control.
[Use spindle motor output] is checked, Mach3 will automatically enable the spindle motor output pin. Click OK when the pop-up happens that will say "Spindle Motor has now been enabled. Ensure you set its pinouts.
Next, select the Motor Outputs tab. At the line where [Signal] is [Spindle], check [Enable], modify [Step Port] to "3", modify [Step Pin#] to "3", and specify O3 as Is the output terminal of the PWM.
Press [OK] button to save. Connect the indicator (refer to the previous section) to O3 for debugging. When the program "M3"executed is, O3 output signal can be seen.
The AVI+ and AVI- corresponds to the ACM and AVI terminals.
In the answer setting, 0-24V is output to out3, but not to AVI+/ACOM.
Of course, 10V is given to the 10V terminal of the board.
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How to output 0-10V to AVI+AVI-?