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I have to set my print flow setting extremely high (up to 180 % and more) as otherwise, I get an under extrusion. I have also noticed that from time to time I have to update that setting to an even higher value.

Question: Is my feed motor broken? Or do I wideness the slow death of it? Or is the calibration getting lower after a while (I would not know why/how this is possible, but still)?

I am using:

  • Cura as slicer (correct 3D printer selected)
  • Ender 3 Pro
  • 0.4 mm Nozzle
  • ERYONE PLA Filament 1.75 mm PLA 1.75 mm 3D Printing

Similar Question: Why is my 3D printer over extruding when I have set the flow rate very low

Edit: @Oscar pointed me to have a close look at the extruder and found a very used feeder-weel: enter image description here Could that be my problem?

Paul
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1 Answers1

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If the feeder gear has worn out, the feeder gear doesn't grip the filament, and hence slips. You would then need to compensate for a larger extrusion length, as you encountered, by e.g. bumping up the flow modifier.

Looking at the feeder gear, I don't know exactly where the filament is being gripped, but, there sure are parts of the teeth missing and some parts are shiny brass colored indicating wear, you need to replace the feeder gear.

It has been reported that some of these feeder gears are crimped onto the stepper shaft, but from the photo you posted a hint of a grub screw can be seen, which would simplify replacement.

Quick fix:

Losen the screw on the feeder gear and adjust the height of it. This way the filament is being fed by not-worn-out teeth (set it above the groove you can see in the question picture). A replacement of the gear is recommended anyway!

Paul
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0scar
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