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Snapmaker U1 ​

Knowledge collection of Guides, Upgrades, Prints, Mods, Instructions and Communities for the Snapmaker U1 printer, a CoreXY, Klipper-based, multi-color FDM printer with a 4-toolhead SnapSwap kinematic tool-change system.

General Info ​

Specifications ​

Show specification table
GroupItemSpecification
BodyTechnologyFDM
Motion SystemCoreXY with carbon fiber X-axis rails
Build Volume (W×D×H)270 × 270 × 270 mm
Tool HeadTool-Change SystemSnapSwap (4 included toolheads, ~5 s swaps, steel-ball kinematic couplings)
Toolheads Included4
NozzleStainless Steel
Nozzle Diameter (Included)0.4 mm
Max Nozzle Temperature300 ℃
Max Flow32 mm³/s
Filament Diameter1.75 mm
Hot bedBuild PlateFlexible Steel Sheet with PEI surface
Max Build Plate Temperature100 ℃
SpeedMax Speed of Tool Head500 mm/s
Max Acceleration of Tool Head20,000 mm/s²
CoolingPart CoolingMain & Auxiliary fans
Supported FilamentBasicPLA, PETG, TPU, PVA, PCTG
With Optional Top Cover+ PET, ABS, ASA, PA, PC
With Top Cover + Hardened Steel Nozzle+ Carbon-fiber & Glass-fiber reinforced polymers
Auto-CalibrationBed LevelingAutomatic mesh bed leveling
Input ShapingAccelerometer-based
Flow CompensationPressure advance
Toolhead OffsetAutomatic calibration (within 0.04 mm)
Filament SystemAutomatic Filament SystemAuto-feed, backup mode, RFID recognition (up to 4 spools)
SensorsChamber Camera2 MP built-in
Filament Run Out SensorYes
Power Loss RecoveryYes
Failure DetectionAir printing, filament runout, toolhead swap error, build plate presence/obstruction
AI Spaghetti DetectionPlanned via OTA firmware update (Dec 2025)
Physical DimensionsDimensions (W×D×H)584 × 499 × 730 mm
Net Weight18.2 kg
Electrical ParametersMax Input Power1150 W (220-240 V) / 400 W (100-120 V)
ElectronicsDisplay3.5-inch 320×480 Touchscreen
ConnectivityWi-Fi 2.4 GHz, USB flash drive
Storage26 GB eMMC
SoftwareSlicerSnapmaker Orca / OrcaSlicer
Slicer Supported OSWindows, macOS, Linux
AppAndroid, iOS
FirmwareBaseKlipper-based

Guides ​

Assembly Instructions ​

Maintenance Guides ​

Calibration ​

The U1 performs automatic mesh bed leveling, accelerometer-based input shaping, pressure-advance flow compensation, and automatic toolhead offset calibration (within 0.04 mm) out of the box.

TPU / Flexible Filament ​

The most common cause of toolchanger jams with soft filaments is the default Material Switching Retraction of 10 mm, which lets TPU buckle and "bird-nest" around the extruder gears during a tool swap (resulting in a no-extrusion error). Reducing it to 0–4 mm keeps the filament seated for reliable 24h+ flexible prints; also recommended are an external dry box and PLA as a break-away support material for TPU.

Reviews ​

Upgrades ​

official by Snapmaker ​

Top Cover ​

An optional enclosing Top Cover expands the filament range to higher-temperature materials (PET, ABS, ASA, PA, PC), and combined with a hardened steel nozzle enables carbon-/glass-fiber reinforced polymers.

Hardened Steel Nozzle ​

Required (together with the Top Cover) for abrasive carbon-/glass-fiber filaments.

unofficial ​

Top Cover / Enclosure (DIY) ​

Printable Things ​

Filament Path / PTFE ​

Feeder & Drybox ​

Spool Holders ​

Cooling / Fans ​

Screen / Display ​

Toolhead / Storage ​

Stand / Furniture ​

Bed / Calibration ​

Anti-Vibration Feet ​

Others ​

Slicer ​

Software ​

Snapmaker Orca ​

The recommended slicer for the U1, an OrcaSlicer-based fork with U1 profiles.

Orca Slicer ​

Other Software ​

Firmware ​

The U1 runs a Klipper-based firmware (Klipper + Moonraker + Fluidd on a Buildroot Linux system) with OTA updates (e.g. AI spaghetti detection planned for Dec 2025).

Official Open-Source Forks ​

Snapmaker has published its modifications to the three open-source projects that form the base of the U1 firmware system (Klipper ~20% modified for parallel multi-toolhead, Moonraker ~15% modified for cloud/3MF, Fluidd UI tweaks).

Community Firmware ​

WARNING

Custom firmware is unofficial and used at your own risk. Damage attributable to custom firmware is not covered under warranty. See the Third-Party Firmware Risk Notice before flashing.

Snapmaker U1 Extended Firmware (by paxx12) ​

The primary, actively maintained community firmware. Adds SSH access, full Klipper / Mainsail / Fluidd, hardware-accelerated WebRTC camera streaming, AI failure detection, OctoEverywhere support and more. (The earlier U1Supercharged project by horza was discontinued in January 2026 and merged into this project.)

Guides ​

Communities ​

Where to buy ​