It's ok. To eliminate this: set the startup blocks or comment definition in config.h You can also use UART (TX1, RX1) instead of USB to connect grbl controller via bluetooth and use with android app ...

A GCode sender (not only for lasers or plotters) for up to two GRBL controller. SVG, DXF, HPGL import. 6 axis DRO.

Everyone knows that lasers are basically magic, and if you strap a diode laser or two to a lawn mower, it should slice through those pesky blades of grass with zero effort. Cue [Allen Pan]’s ...

A laser is a very thin, focused beam of light that heats and destroys tissue. Lasers can focus very accurately on tiny areas. Doctors can use lasers: instead of blades (scalpels) for surgery to heat ...

Your average laser pointer just doesn’t have the appropriate beam for this kind of work, but with a diode pulled from a DVD burner and a driver circuit made from parts out of the junk bin ...