Hemera Extruder with Vulcano h/e

Discussion in 'HotEnds & Extruders' started by xchg.ca, May 5, 2022.

  1. xchg.ca

    xchg.ca New Member

    May 5, 2022
    Likes Received:
    Hi guys,

    My first post here, looking for collective wisdom to help me with my setup:
    Hemera Direct + Vulcano + 0.8mm nozzle
    SKR 1.3 + TMC2226 + Marlin 2.0.9
    Extruder Stepper in SpredSpectrum mode rest in StealthChop

    Extruder is calibrated, PID is calibrated.

    Looks like when printing anything faster then 40 mm/s it comes up underextruded on top surfaces ( with holes etc )

    Can correctly extrude 100mm of PETG ( 230C ) with 760mm/m(12.6mm/s) extrusion speed via 0.8 nozzle
    Anything more then 760 - underextrudes !

    Cannot perform Marlin Linear Advance test properly, it just looks like crap. as I see only lines extruded at 20mm/s rest is not existent.

    In same time my stock RigidBot Big (another printer) with very dated A4988 driver and its original dated and low-tech extruder + 0.5mm Vulcano ) can do easily 70 mm/s with the same model and looks much better !

    Is there any current requirement for Extruder driver ( I currently using marlin default AFAIK it is set to 800ma )

    Is there anything else I have to take a look ?
    I understand it is very broad problem... but may be I'm missing something?

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