What is the difference between this two? Are they the same? Do I need both? I am starting to use GRBL1.1.
Take a look at the software workflow.
Estlcam can do the CAM step and also the gcode sender, but only with some controllers/firmwares. It will also happily flash your controller, so be careful if that isn’t what you want.
I prefer to use estlcam for CAM only.
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That was a professional explanation thanks you for the tip 