prime the extruder
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I am getting an error "bad command prime the extruder"
unfortunately I have no idea what "prime the extruder" means. searched everywhere including this forum but found no results.
here are the conditions:
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I am trying to diagnose a situation where I had twice a sudden crush of the head - happening both times at the beginning of the second layer. the head dropped down very quickly and hit the bed.
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to avoid damage in the investigation, I defined Z zero high above the bed expecting to do only air printing so I can catch the head in time if the problem repeats.
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I removed the filament from the extruder but kept the high extruding temp on. there is no sensor for the filament (I know I should repeat the test with filament but have not had a chance)
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under these conditions, I tried to print a different file than the one which had created the problem. it worked well (in the air!) with no crush.
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then I tried to repeat testing but began to receive those "bad command prime the extruder" warnings.
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additional notes:
Error: G0/G1: target position not reachable from current position
Error: SetPositions called when DDA ring not empty
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@ooly My best guess is that there is something set up in the slicer to prime the extruder, but the command that the slicer uses isn't a valid RepRap firmware command. Can you post the section of the gcode file you are trying to print at the start of the second layer where the problem happens? . Or if you look through the file yourself you'll probably find the culprit. Look for any commands which come after a G1 Znn move.
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It's probably a comment line in your slicer start gcode that is missing a ; to comment it out
