Troubleshooting
Fix Blobs and Zits: Small Bumps From Retraction and the Seam
Trace small surface bumps to retraction, coasting or the seam before assuming the whole print is over-extruding.
Fix Mid-Print Curling on Thin, Flat Features
Fix mid-print curling on thin fins and flat panels by tuning cooling, orientation and layer time; separate from bed-adhesion warping.
Stop Nozzle Oozing: Drips and Blobs During Idle Moves
Stop nozzle oozing by fixing heat creep, coasting, pressure advance and idle temperatures; a different problem from stringing.
Fix Failed Resin Prints: Exposure, FEP and Wash-Cure Errors
Diagnose failed resin prints by checking exposure time, FEP film condition, resin temperature, supports and the wash-cure process.
Stop Thermal Runaway: What Triggers It and Why the Safety Shutdown Must Stay On
Understand what thermal runaway protection does in Marlin and Klipper, what commonly triggers it, and what to do if it happens.
Fix Pillowing: Smooth Out Bumpy, Uneven Top Layers
Stop pillowing on 3D print top surfaces caused by thin top layers, weak infill support or fast top layer speed.
Fix Layer Separation: Stop Prints From Cracking Along a Layer Line
Learn why 3D prints delaminate and crack along a layer line, and how to fix temperature, cooling, speed and material causes.
Fix Z-Banding: Horizontal Ripples at a Regular Height
Trace horizontal ripples that repeat at a set height to a bent leadscrew, a loose coupler, backlash or layer height.
Fix Over-Extrusion: Blobs, Bulging Walls and Poor Accuracy
Work out whether excess material comes from e-steps, filament diameter, flow rate or the wrong nozzle profile.
Stop Spaghetti: Catch a Failing Print Before It Wastes Filament
Recognize a failing print early, stop it safely, and trace the tangle to adhesion loss, a collision or a filament problem.
