****In the Electrical section, you either set your laser driver to be connected to Pin 13 (Relay) or Pin 7 (PWM). When setting up the UCCNC controller
there will be a “mapping” between the pins in the software and the pins in real life on the DB15 connector. ****
UCCNC PIN 1 = STEPCRAFT DB15 PIN 13
UCCNC PIN 17 = STEPCRAFT DB15 PIN 7
For ON/OFF relay control:
Uncheck the box on “PWM spindle” and check the “Spindle relay output enabled”.
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Set M3 relay pin to “1” and port to “1”. This will map to the stepcraft Pin 13 that you have connected to the laser driver.
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You can now turn on and off your laser with the “M3” command. Test it on the run screen by pushing the clockwise spindle button.
For PWM control:
Check both the boxes for “PWM Spindle” and “Spindle relay output enabled”.
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Set M3 relay pin to “1” and port to “1” in the spindle relay section.
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Set PWM pin to 17.
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Set your Frequency to a number you want. 100 or 500 is pretty good. Anything under 5000 will work.
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Set minimum duty % to 0.
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Set maximum duty % to 100.
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Now you will have control over the power using the command:
M3 SXXX
where the “XXX” is a number between 0 and 100.
Quick Notes Page 5
