I am trying to make a pen plotter from scratch. I hooked up two scanners to form X and Y axis, and using a CD drive to lift the pen. I connected everything to Arduino Mega 2560 and RAMPS 1.4 shield with DRV8825 drivers. I tested everything using simple Arduino sketches that sent step signals. So far, so good, however, today I uploaded GRBL and downloaded Pronterface, to actually use G-code, but after successfully connecting on Pronterface to the port at the 115200 Baud rate, I am only getting error: 20
non stop.
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error 20
notifies you of an incorrectly sent G-code instruction. Are you sure Pronterface isn't sending constantly ( e.g. to probe for temperatures) while GBRL doesn't support the G-code? $\endgroup$M105
to probe the temperatures of hotend and bed. GBRL doesn't support that. As it is periodically sent, the program reports an error, you cannot use this program for movement while it already is in error. $\endgroup$