Stepper Motor configuration starts at line 32 of the attached config file. The Motor pin details are shown on the right hand side of the photo. Laser_module_pwm_pin is set to 2.5 denoting that this pin will be used to control the laser power. In the Config.txt file attached, The laser module configuration starts at line 98. Note only the -ve pin needs to be connected and it goes to the L on the power supply. On the left of the drawing is pin 2.5, this is the -ve pin labelled to control the bed heater. It is important to make a note of the connecting pins that you are going to use. The attached Pinout is specifically for the BigTreeTech SKR V1.3 board.
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