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Showing posts from October, 2026

Clogged Nozzle and Cold Pulls: Find Where the Plug Sits, Diagnosed in 4 Questions

The print is running, the head is moving — and nothing is coming out. Or almost nothing: a thin, curling dribble where a clean strand should be, an extruder clicking against a wall it cannot push through. That is a clog — but "clogged nozzle" is a location guess, not a diagnosis, and it is wrong often enough to matter: the plug can sit in the nozzle, above it in the heatbreak, or further up in the tube, and each address has a different cure. In the FixMyPrint community dataset, clogging and heat creep together account for 764 of more than 20,000 help posts — a count of community help posts in that analysis, not a measurement of how often nozzles clog across all printers. Instead of a fix list, this guide asks four triage questions: real clogs overlap (one jam can click and dribble and return tomorrow), so the questions set an order of suspicion — cheapest discriminating tests first, the plug's location established by evidence before anything is heated, pulled or uns...

Layer Shifting: Sideways Steps and Staircase Prints, Diagnosed in 4 Questions

The print came off the bed looking wrong in a way you can feel with a fingertip: partway up the wall there is a clean step, and everything above it sits offset to one side, as if the print had been sliced and glued back crooked. That is layer shifting : from one layer onward, the printer kept laying plastic — faithfully, neatly, in the wrong place. In the FixMyPrint community dataset it was the sixth most reported problem: 1,138 of more than 20,000 help posts — a count of community help posts in that analysis, not a measurement of how often layer shifting occurs across all printers. Instead of a fix list, this guide asks four triage questions: a shift has a short list of mechanical families behind it, and the questions sort yours by evidence — which axis, how often, at what height — with a test narrowing the cause before anything is tightened, slowed or reconfigured. Compiled from published sources — Prusa's Knowledge Base, Bambu Lab's Wiki, Simplify3D's troubleshooting...