QUESTIONFilamentFoxAug 23, 2026, 7:17 AM

TPU feeds fine by hand but jams halfway through prints

95A TPU loads cleanly and extrudes on command, then after 20-30 minutes it bunches near the extruder gears. Retraction is already low. Could too much idler pressure alone cause this?

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QuietStepperAug 23, 2026, 3:17 PM

Yes. Too much idler pressure can flatten soft filament and make it buckle more easily. I would reduce tension a little and slow the print before changing temperatures.

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TPU feeds fine by hand but jams halfway through prints

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