Private on-device repair evidence

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.

Not started0 of 8 stepsNot yet saved

Visual repair reference for mmu load or unload failure — A small representative test no longer shows the original symptom.

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.

Controlled tests logged0

Verification resultNot recorded

Machine and material context

Record the setup that produced this result

Printer Extruder Material Slicer Nozzle / layer

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Optional visual proof

Add before and after photos for this report

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One variable at a time

Controlled test history

No controlled tests have been logged yet. Return to Workshop Mode and record each change before running another test.

Repair sequence

Step completion

1
Unload and inspect the filament tip shape.Not completed
2
Clean and align selector, idler, gears, and channel entrances.Not completed
3
Check every PTFE tube is fully seated and free of sharp bends.Not completed
4
Calibrate filament sensors using the official workflow.Not completed
5
Verify spool and buffer movement with minimal resistance.Not completed
6
Tune unload temperature or cooling only after mechanics are correct.Not completed
7
Test load and unload repeatedly with one channel.Not completed
8
Add channels one at a time and confirm reliable transitions.Not completed

Private workshop notes

Observations and winning values

No notes recorded.

Verification test

Model: Small representative test print
Setup: Use the same printer, material, slicer and key settings as the failed model.
Pass: The original symptom is absent and the target feature is repeatable.
If unchanged: The symptom remains in the same location or stage.

Matched next step

Keep the useful workflow going.

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MMU Load or Unload Failure

Verification test

Keep the winning setup and change only one variable in the next test.

Keep the useful workflow going.