Hemera under extruding after few layers.

Discussion in 'HotEnds & Extruders' started by Cem Eraslan, Nov 29, 2020.

  1. Cem Eraslan

    Cem Eraslan Member

    Jul 24, 2020
    Likes Received:
    My filament is Amazon basics PLA.
    Hotend is 215 degrees bed is 60 degrees, Retraction is 1.6mm. I am printing through octoprint.
    Board is Skr mini 1.3 with Marlin. All required changes has been done in firmware. It was printing flawlessly. with this settings in the past.
    For a couple of weeks I am getting under extrusion after first few layers. nothing has changed. I have disassembled the unit,cleaned all pieces, changed the nozzle, tested extrusion it all looks fine. When I cancel the print after under extrusion, next time when I do a test for extrusion, it extrudes properly. until the print starts.
    Again after few layers no extrusion. I suspect it might be the cable. so I have ordered some new cables. but do you have other suggestions.
    I also checked the gears for cracks and I have tried all tensioner versions.
  2. Marcus Mendenhall

    Marcus Mendenhall Well-Known Member

    Mar 24, 2020
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    Although this isn't probably related to your extrusion problem, in my experience 1.6 mm is a lot of retraction for a Hemera. It has a very short filament path. I use only 0.5mm for PLA, and have no sign of it drooling. You do risk a bit sucking air bubbles back into the nozzle with that much retraction, which can cause issues.

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