To communicate between the laser head and Stepcraft CNC machine, we will use the PWM signal. To make the Stepcraft machine generate this signal, activate pin 17 via the software. 

It is also very important to activate pins: 11 and 16. Those pins are responsible for laser’s emergency stop.

  1. In the UCCNC software program, go to CONFIGURATION -> I/O SETUP and apply the following settings:

UCCNC Settings for Laser

Important: The "Active Low" Button needs to be kept switched off at all times.