The current GRBL version also has a useful laser mode. I’m running GRBL on an Arduino Uno for Lightburn rather than on my Rambo board since I’ve found it much easier and quicker to reprogram the GRBL parameters when I need to. This is a test piece of birch on a standard 1” 8tpi chuck commonly used on wood lathes so I can turn it, burn it and finish it without rechucking. Eventually I will find or invent a way to have the LED laser follow the curve to maintain the focus. The depth of focus is about 6mm so for now flatter parts of the curve work better. Otherwise my 3 watt LED laser burns like a champ. Figuring the steps per mm that Lightburn requires was essential. It was easier, as Ryan has said, to drop that part of the table than to have spindly legs for the MPCNC. I built a simple, inexpensive rotary axis from a geared Nema17 stepper 5.18 : 1 ratio, an 8 mm shaft, a couple of bearings and a plain 1” bolt I drilled on my wood Lathe for the 8mm shaft. I am making progress to turned wooden bowl embellishment.
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