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TAZ Pro - extruder not spinning
Closed, ResolvedPublic

Description

This occurs on firmware .135 and .144. Using 2x polylite PLA. Gcode generated using cura 3.6.14.

What happens:

  1. start the print with the attached gcode (it's just 2 flat squares)
  2. both nozzles purge
  3. nozzle 1 lays down the skirt and layer 1 for right square
  4. switches to nozzle 2, lays down the skirt, layer 1 of left square, and layer 2 of left square
  5. switches to nozzle 1, does the motion for layer 2 of the right square, but the extruder motor is not going. Since it continues to run without extruding, it fails with an "Extruder 1 Filament Error" error.
  6. menu -> resume print. Again it goes through the motion but does not extrude, failing out again.

Related Objects

Event Timeline

matth created this task.Jul 17 2019, 2:57 PM
matth triaged this task as Normal priority.
Steven added a subscriber: Steven.Jul 17 2019, 3:02 PM

@matth can you also provide the .stl file in case that is needed?

matth added a comment.Jul 17 2019, 3:07 PM

I made it in freecad, with a height to make it need 2 layers. In cura, I load it in twice and have each nozzle print each one. Been using it since alpha to determine z-offset height.

tutley added a subscriber: tutley.Jul 18 2019, 8:14 AM

@matth i was not able to replicate this on my machine running .144 firmware. the gcode looks normal. Is this something that is repeatable on your machine? or it just happens sometimes?

Can you try running M502 and M500 and see if the issue persists?

I repeated it several times July 17th, then of course it doesn't repeat when I brought it in today. While it was repeating for nozzle 1, it may have been occurring for nozzle 2 as well. In T8648, I mentioned how I was repeatedly getting "Extruder x Filament Error" messages prior to the heat runaway. At every error, I would confirm it wasn't stripping out and indeed extruding correctly, yet would still give the error when resumed. When I would disable the runout sensor and resume the print, it would complete the print without extruding from that nozzle for the rest of the print.

I left the printer with @tutley, and if you can't repeat the error with my short testsquare print, try a longer print like the flexi octopus: https://www.thingiverse.com/thing:3430925

If no one else has this issue, then it's probably just my machine. I have disassembled and reassembled that toolhead multiple times and may have pulled too hard on a wire or something.

@matth The way the E1 motor harness was zip tied on your machine caused a wire break that was intermittent. When you were here i mentioned the zip tie placement on your motor harness was incorrect and looked like it was causing serious strain on the cables. I was able to reproduce the issue when lightly touching the jst harness where the cables meet the connector. I have replaced this harness with a brand new one and corrected the wire routing so this should not happen again.

All is good on your machine now!

tutley closed this task as Resolved.Jul 18 2019, 1:53 PM
tutley claimed this task.
Steven added a comment.EditedJul 18 2019, 2:02 PM

@tutley can you please see if that process is documented correctly in the Ohai?

@Steven the OHAI shows the zip tie further up, but i think it could still cause problems over time through toolhead actuation. I would like to see the motor wires come out towards the middle of the harness and the bottom zip tie not even be around the motor wires

FWIW the two production tool heads on my desk have the motor harness built to the way i would prefer to see (not matching ohai)

kent added a subscriber: cmerot.Jul 18 2019, 2:19 PM