Troubleshooting
Diagnose and fix common issues. Sorted by frequency in real customer cases.
Top issues
Section titled “Top issues”Feeding system
Section titled “Feeding system”- Hopper suction problems — pellets don’t reach the hopper, vacuum struggles, shutdown during suction (most frequent overall)
First-layer & calibration
Section titled “First-layer & calibration”- Z offset and first layer — first layer too high / too low / not sticking
Extrusion
Section titled “Extrusion”- Nozzle and barrel clog — material plugged in the extruder
- Extruder motor skipping — clicking sound, motor losing steps
- Extruder driver and 55V step-up — motor stops/skips due to an electrical fault (driver / 55V boost)
- Layer shift and quality issues — blobs, stringing, Arachne vs Classic
- Wall turbulence and surface quality — rough “turbulent” walls, often recycled/irregular feedstock
- Black splashes and nozzle degradation — carbonized material in nozzle after long runs
Material problems
Section titled “Material problems”- PETG foaming and moisture — wet PETG, bubbles, foaming
- Warping — corners lifting; material choice, bed temp, brim
- Color streaks and pigment dosing — uneven color, transparent streaks, masterbatch %
- Dryer best practices — pellet drying problems
Electrical & first boot
Section titled “Electrical & first boot”- Bed heater on wrong outlet — bed heats by itself / 110°C error
- Machine won’t start - emergency button — red mushroom pressed
- Klipper MCU communication lost — MCU shutdown errors
- Running the G1 in 110V regions (US) — split-phase 240V vs step-up converters
Temperature
Section titled “Temperature”- Temperature sensor disconnected — NTC unplugged or pulled out
- Heater not reaching temperature — heater drops during print, fan on sensor, PID issues
Mechanics
Section titled “Mechanics”- Belt and chain mechanical issues — loose belts, frame issues
- Probe arm bending — probe stuck, not triggering, physically bent arm
Bed adhesion
Section titled “Bed adhesion”- Bed adhesion sprays — DimaFix, MagiGoo, RainX, etc.
- Bed surface — glass cracking (PETG bonds too hard), surface options per material
Safety
Section titled “Safety”- Safety and fumes — ventilation, recognizing contaminated material, ABS/ASA hazards
Slicer
Section titled “Slicer”- Ginger Slicer settings overview — speed drops, retraction, Z-hop, Arachne, Pressure Advance
Diagnostic tree
Section titled “Diagnostic tree”Not sure where to start? Pick the closest symptom:
| Symptom | Likely note |
|---|---|
| Machine doesn’t turn on | Machine won’t start - emergency button |
| Bed heats by itself, error at 110°C | Bed heater on wrong outlet |
| Klipper says “MCU shutdown” | Klipper MCU communication lost |
| Temperature error on a heating zone | Temperature sensor disconnected or Heater not reaching temperature |
| Pellets don’t reach the hopper | Hopper suction problems |
| Loud “tak-tak-tak” from the motor | Extruder motor skipping |
| PETG looks foamy, full of bubbles | PETG foaming and moisture |
| First layer too high / too low | Z offset and first layer |
| Nozzle / extruder clogged | Nozzle and barrel clog |
Status legend
Section titled “Status legend”- v1 (green) — reviewed and confirmed by Davide
- v0 (yellow) — extracted from chats / docs, not yet human-reviewed
Future human review passes bump the version (v2, v3, …).
Related
Section titled “Related”- MOC - Components — hardware reference
- MOC - Materials — material-specific issues
- MOC - Procedures — corrective procedures