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I've try firmware v1.1 like you say. The laser can work but if i move one of the axis my stepper just one is turning. As i know with your library if we want to move the axis, both motor will moving. How can you moving both stepper in one time?
Thanks for your answer, i try it but not solve my problem because it change both of axis. I have try to modification with the library code. In gcode.c line 349 case 'Y' i multiple the value with -1 and it solve my problem. But now i want to using laser not pen, can you give me a tutorial to make it run. Tks FYI