U1 Knowledge Base
Fix, maintain, and understand your U1.
Solve a problem
Start using U1
Maintenance
Replacement
Overview
¶
Get to Know U1
Quick Start Guide
Safety Guidelines
FAQ for U1
User entry
¶
First Use
¶
Package Contents
Unboxing
Packing
¶
Firmware Information
Firmware Update
Firmware Release Notes
¶
Basic Usage Guide
Initial Setup & Printing
How to Find the Serial Number
Manual Loading Filament
Automatic Loading Filament
Unloading Rigid Filament
Unloading Flexible Filament
Export time-lapse
¶
Add-on Guides
Hotend Guide
Build Plate Guide
SnapDryer Guide
Top Cover User Guides
Common Issues with Build Plate
EXPERT LAYER
¶
Advanced Skills
¶
Advanced Printing Tips
Full Spectrum
FAQ for Full Spectrum Beta
Multi-Material Supports
Tips for Reliable TPU Printing
Diagnostic system
¶
Troubleshooting
How to Export logs ?
Filament not extrude
Pogopin Connection Error
¶
By Error Code
Where to find your code
Your touchscreen shows a 4-part code, e.g.
0003-0523-0000-0006
. Type or paste it below.
Start Troubleshooting
¶
By Issue Location
Toolhead
▶
Extrusion & Clogging
Filament not extruding
Nozzle scraping the build plate
How to remove the blob
Temperature & Heating
Nozzle temperature out of range
Nozzle temperature anomaly
How to bypass a faulty toolhead
Connection & Sensor
Toolhead connection failed/interrupted
No toolhead detected
False filament runout detection
Other
Hotend copper sheet detachment
Nozzle diameter mismatch
Toolhead Swapper
▶
Docking & Contact
Toolhead picking/parking failure
Pogopin contact anomaly
Stripped screws
Part cooling fan cannot rotate
Parking status detection anomaly
Filament Feeder
▶
Feed Path
Automatic loading failure
Printing anomaly
Unable to pull out the filament
Filament breakage stuck in tube
Heated Bed
▶
Temperature & Assembly
Temperature exceeds limit
Heating anomaly / Slow heating / Not heating
Bottom cover loose
Stripped screws
Severely tilted heated bed
Touchscreen
▶
Display & Input
Black screen / No response / Display anomaly
XYZ Axis
▶
Motion & Homing
Homing sensor not triggered
Tap Home first,then...
Corexy home is unstable
X/Y movement exceeded travel limit
Z-axis noise (thumping sound)
Elevated XY driver temperature
Lead Screw / Linear Rod Out of Position
Power Supply
▶
Power State
False power-off signal triggered
Power switch unlit
Firmware & Main control board
▶
Control & Firmware
Firmware update failed
Timer too close
System Anomaly
MCU control timed out
Others
▶
Accessory & Material
Spool holder claw detachment
Quality layer
¶
Print Quality
Layer Shifting
Poor first-layer quality
Blob
Pitting & pockmarks
Gaps between layers
Layer Lines
Other print quality issues
▶
Stringing
Under extrusion
Gaps in the Top Layer
Poor bridging quality
Poor overhang quality
Poor First Layer Adhesion
Filament Sticks to Nozzle
Model Warps, Detaches or Collapses
Inconsistent Surface Gloss
Visible seam marks
Prime Tower Collapse
Multi-color misalignment
Parameter calibration
▶
Precess configuration
Temperature calibration
Flow ratio calibration
Pressure advance calibration
Action layer
¶
Maintenance
Core components maintenance guide
Adjusting xy belt tension
Clean PEI sheet
Toolhead Disassembly
Adjust pick-and-park coordinates
Nozzle cold pull
Repair layer
¶
Replacement
Toolhead
▶
Hotend
Hotend unit
Hotend configuration
Ceramic heater
Thermistor
Extruder Unit
Extruder unit
Extruder housing
Extruder motor
Filament runout sensor
Driven extruder gear assembly
Active extruder gear assembly
Others
Toolhead PCB
Toolhead USB cable
Hotend cooling fan
Toolhead male mount
Toolhead Swapper
▶
Cooling & Docking
Part cooling fan
Part cooling fan adapter board
Part cooling duct kit
Heated Bed
▶
Bed Assembly
Heated bed
Touchscreen
▶
Display Assembly
Touchscreen
Touchscreen FFC cable
PCBA
▶
Control Boards
Main control board
HUB board
RFID board
Docking Hall sensor board
XYZ Axis
▶
Motion System
XY belt
XY belt Path Guide
Z belt
XY motor
Z motor
X carbon rod
Others
▶
Accessories & External Parts
Filament feeder
Camera
Nozzle wiper
Nozzle cleaning brushes & Parking pads
Toolhead docking bracket
Parking tool
Glass door
RFID coil
Auxiliary cooling fan
Power supply
Power supply cooling fan
LED strip