STLBEAST workshop mode
MMU Load or Unload Failure
Align the selector and filament tips, reduce path friction, calibrate sensor positions, clean drive gears, and verify reliable single-filament loading before mu.
Start hereAlign the selector and filament tips, reduce path friction, calibrate sensor positions, clean drive gears, and verify reliable single-filament loading before multicolour printing.
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
Keep the problem and target visual open while you make this change.
Why this mattersA bulb, hook, or string catches in the path.
Setting or checkTool-change temperatureAffects tip shape; use the material-system profile.
Expected resultThe original symptom no longer appears during a representative calibration or short test print.
Step 2 of 8
Clean and align selector, idler, gears, and channel entrances.
Keep the problem and target visual open while you make this change.
Why this mattersThe system cannot confirm position.
Setting or checkCooling movesHelp shape the tip but cannot fix misalignment.
Expected resultMeasurements, temperatures, motion, feed, or exposure remain stable through the complete test.
Keep the problem and target visual open while you make this change.
Why this mattersFilament misses the intended channel.
Setting or checkSensor thresholdCalibrate according to the system documentation.
Expected resultNo new warning, collision, leak, electrical smell, unusual heat, or material damage appears.
Keep the problem and target visual open while you make this change.
Why this mattersPTFE, spool, or buffer resistance exceeds feeder force.
Setting or checkTool-change temperatureAffects tip shape; use the material-system profile.
Expected resultThe successful change is recorded with printer, material, slicer, nozzle or resin, and date.
Keep the problem and target visual open while you make this change.
Why this mattersGrip is inconsistent.
Setting or checkCooling movesHelp shape the tip but cannot fix misalignment.
Expected resultThe original symptom no longer appears during a representative calibration or short test print.
Keep the problem and target visual open while you make this change.
Why this mattersA bulb, hook, or string catches in the path.
Setting or checkSensor thresholdCalibrate according to the system documentation.
Expected resultMeasurements, temperatures, motion, feed, or exposure remain stable through the complete test.
Keep the problem and target visual open while you make this change.
Why this mattersThe system cannot confirm position.
Setting or checkTool-change temperatureAffects tip shape; use the material-system profile.
Expected resultNo new warning, collision, leak, electrical smell, unusual heat, or material damage appears.
Keep the problem and target visual open while you make this change.
Why this mattersFilament misses the intended channel.
Setting or checkCooling movesHelp shape the tip but cannot fix misalignment.
Expected resultThe successful change is recorded with printer, material, slicer, nozzle or resin, and date.
Controlled test logChange 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.
Open proof report →No controlled tests logged yet. Record the first change before adjusting a second variable.
Do not repeat the full print yet
Prove the repair with a small test
Test modelSmall representative test print
SetupUse the same printer, material, slicer and key settings as the failed model.
Pass conditionThe original symptom is absent and the target feature is repeatable.
If it still failsThe symptom remains in the same location or stage.
Complete the repair steps, run the proof test, and record the result.
Only if the proof test still failsNext strongest repair paths
Do not stack these changes. Open one related guide based on the evidence that remains.
Multi-MaterialAMS or Multi-Spool Filament Feed Failure
Multi-MaterialColour Contamination Between Multi-Colour Filaments
Multi-MaterialPurge Tower Falling Over or Failing
