If you are using Lightburn, there are plenty of tutorials on how to connect the computer to the laser and make sure it is all working properly. Obviously you need to add your stepper drivers to the board, set those up, connect your motors and endstops, however those are generic requirements well detailed elsewhere in the world. Power up the board and after about a minute, you should be ready to go. Place the Firmware.bin file and the config.txt file in the root directory of the SD card, then transfer this to the board. You are looking for something like FirmwareCNC.bin.ĭownload this file and rename it to Firmware.bin.įormat the SD card that came with the SKR V1.3, I have found that they are corrupt in some way and the firmware doesn't load very well or doesn't allow a connection via the board to your computer. There is a specific CNC version of Smoothieware that you should use for Lasers and CNCs as a number of modules are not needed eg heaters and so on. I went to Github for the latest version of Smoothieware, I wont include a link as it may move or be updated, just do a search. I don't know why there is the symbol at the end of the pin number eg 1.29^ it was in the config file I found, so I left it and it seemed to work. Note alpha motor is the X axis motorĪlpha_step_pin 2.2 # Pin for alpha stepper step signal alpha_dir_pin 2.6! # Pin for alpha stepper direction, add '!' to reverse directionĪlpha_en_pin 2.1 # Pin for alpha enable pinĮndstop pin numbers are shown in purple towards the middle right of the attached picture.Įndstop configuration starts at line 210 of the attached conifg.txt file. 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.

K40 lightburn board