Set enough idler pressure to feed consistently without crushing, flattening, or grinding the filament, then verify with a measured extrusion test.
Start hereSet enough idler pressure to feed consistently without crushing, flattening, or grinding the filament, then verify with a measured extrusion test.
First safe actionRun the first safe check and change one variable at a time.
Proof targetA small representative test no longer shows the original symptom.
Match the failed area to the visual before changing a setting.
Repair progress0 of 8 complete
Step 1 of 8
Unload filament and clean the drive gear.
Keep the problem and target visual open while you make this change.
Why this matters
The drive gear cannot transmit enough force.
Setting or checkIdler tension
Use the manufacturer starting mark or spring compression.
Expected result
The original symptom no longer appears during a representative calibration or short test print.
Step 2 of 8
Inspect gear wear, alignment, bearings, idler arm, and filament path.
Keep the problem and target visual open while you make this change.
Why this matters
Filament deforms and friction increases.
Setting or checkExtrusion speed
Test slowly to avoid confusing volumetric-flow limits with tension.
Expected result
Measurements, temperatures, motion, feed, or exposure remain stable through the complete test.
Step 3 of 8
Return the tension adjuster to the manufacturer starting position.
Keep the problem and target visual open while you make this change.
Why this matters
Grip is inconsistent despite correct tension.
Setting or checkRetraction
Excessive cycles can grind filament even with correct tension.
Expected result
No new warning, collision, leak, electrical smell, unusual heat, or material damage appears.
Step 4 of 8
Load straight, dry filament of known diameter.
Keep the problem and target visual open while you make this change.
Why this matters
The teeth do not centre on the filament.
Setting or checkIdler tension
Use the manufacturer starting mark or spring compression.
Expected result
The successful change is recorded with printer, material, slicer, nozzle or resin, and date.
Step 5 of 8
Extrude slowly and increase tension only until slipping stops.
Keep the problem and target visual open while you make this change.
Why this matters
A clog makes normal tension appear inadequate.
Setting or checkExtrusion speed
Test slowly to avoid confusing volumetric-flow limits with tension.
Expected result
The original symptom no longer appears during a representative calibration or short test print.
Step 6 of 8
Reduce tension if the filament is crushed or deeply grooved.
Keep the problem and target visual open while you make this change.
Why this matters
The drive gear cannot transmit enough force.
Setting or checkRetraction
Excessive cycles can grind filament even with correct tension.
Expected result
Measurements, temperatures, motion, feed, or exposure remain stable through the complete test.
Step 7 of 8
Check for nozzle or tube restrictions before adding more pressure.
Keep the problem and target visual open while you make this change.
Why this matters
Filament deforms and friction increases.
Setting or checkIdler tension
Use the manufacturer starting mark or spring compression.
Expected result
No new warning, collision, leak, electrical smell, unusual heat, or material damage appears.
Step 8 of 8
Run a measured extrusion and retraction test.
Keep the problem and target visual open while you make this change.
Why this matters
Grip is inconsistent despite correct tension.
Setting or checkExtrusion speed
Test slowly to avoid confusing volumetric-flow limits with tension.
Expected result
The successful change is recorded with printer, material, slicer, nozzle or resin, and date.
Controlled test log
Change one variable, then record what happened
This keeps temperature, retraction, speed, mechanical, and material tests from blending together. The history stays private in this browser.
Extrusion & Feed PathBowden Coupler Slipping or PTFE Tube Pulling Out
ExtrusionPartial or Clogged Nozzle Fix
First Layer3D Print Not Sticking to the Bed
