Underextrusion at the Beginning of Print Moves
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@phaedrux what is the extruder?
It totally goes away if you revert to a previous firmware version?
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The motor runs at 900mA which is the current it is rated at.
I have not tried reverting to an older firmware version. I am not sure how to do this safely. -
@garv3 said in Underextrusion at the Beginning of Print Moves:
I am not sure how to do this safely.
Get whatever version you wish from Github. Follow the normal upload, etc. Depending on exact versions, slight tweaks to configuration may be needed.
If you somehow get "painted into a corner", follow the fallback procedures here:
https://duet3d.dozuki.com/Wiki/Installing_and_Updating_Firmware
Fallback #3 will ALWAYS work, and can be used to install any release after 1.19. In fact, if you have doubt about "mixed versions" or similar, starting with a blank/formatted card and fallback #3 will ensure everything is in sync. I've done it before, just for "mental comfort".
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900ma seems low to me for rated current. Can you post a link to the motor specs?
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Main Features:
- Step angle: 1.8 degree
- Number of phases: 2
- Voltage: 3.96V
- Current: 0.9A
- Resistance: 4.4 ohm
- Holding torque: 0.34 Nm
In this case 900mA might be too high for this motor, try 765 instead which would be 85% of rated.
Running the motor at max current could explain the behaviour seen here if it's overheating. Does the motor feel hot to the touch?
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During long prints they get warm but not really hot. I set them to 765mA now.
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Lowering the current unfortunately didn't change anything.
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Can you post some pictures of your slicer settings?
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Also, what type of extruder is it? 4mm of retraction may be too much. It really looks like retraction under runs.
