GRBL Laser Mode Firmware Configuration Check

To verify if the laser module failure is caused by incorrect firmware settings, connect to your machine via a serial console and query the current GRBL parameters. Specifically, check the status of $32. If $32=0, the board is operating in standard spindle mode, which does not output the correct PWM signal for laser modules. Additionally, confirm that $30 is set to match your software's maximum S-value (typically 255 or 1000). If these values do not align with your system requirements, the controller will fail to command the laser module to fire.

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