![]() ![]() The detail of GRBL V1.1 laser mode can be found from GRBL v1. So, everything is nice and smooth with the laser mode in GRBL. However, if it is used to control a laser, the staying leads to scorching, uneven cutting depth, or bumpy engraving marks! The laser mode prevents unnecessary stops whenever possible and adds a new dynamic laser power mode that automatically scales power based on the programmed speed along the path. ![]() In the spindle mode, every time a spindle state (such as M3, M4, or M5) or spindle speed (Sxxx) is altered, the controller temporarily stops the feed motion. This gives time to allow the spindle to speed up/down. The main difference between them is how the spindle/laser output is controlled with motions. So, what is the principle behind that makes them result differently? The planner moves the laser point to your defined coordination and tuning the PWM power of your laser diode in both laser and spindle modes. ![]() What is the difference between laser and spindle mode in GRBL? You need to correctly configure the GRBL settings when installing the firmware to your machines. First, please note that LightBurn bridge is only supported on Raspberry Pi 3b, 3b+, or 4 models. Therefore, laser mode has been introduced in GRBL v0.9 or higher. Primary Docs LightBurn Bridge Advanced Advanced LightBurn Bridge Setup If you either want to roll your own LightBurn Bridge with a Raspberry Pi you already own or just want to dive deeper into configuration options, this page is for you. ![]() The laser process has almost the same control loop, except for the tweak of laser power. The controller was primarily developed for CNC milling, controlling the spindle rpm, which is known as spindle mode. GRBL is an open-source firmware that runs on an Arduino for converting g-code commands to the motion control of CNC machines. ![]()
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