Can't jog. Error code

New to CNC. I have yet to actually carve anything. I’m have an X carve and am running G -sender 1.4.1. The machine homes but cannot jog. I get an error that says bad format number. $J=G20G91 X0.787 F197.

Hi @Jimtric the reason you’re seeing this error is because you’re running a much older firmware on your X-Carve that doesn’t recognize typical grbl jog commands. I’d recommend you update your Firmware if you can, otherwise you should still find that all other gSender features work as expected, minus the jogging