A complete CoreXY printer with four parked toolheads, one filament each. The carriage drops one toolhead and picks up the next instead of purging a shared nozzle. You can swap hotends and nozzle sizes, but you cannot add a fifth toolhead.
The Snapmaker U1 is a complete toolchanger printer with four toolheads. Its carriage parks one toolhead and picks up another, a system Snapmaker calls SnapSwap and says takes about 5 seconds. Each toolhead holds its own filament, so a color change never purges a shared nozzle. The U1 was listed at $749 on Snapmaker’s US store on October 14, 2026, in stock.
Four toolheads sit in a docking bracket, each with its own extruder, hotend and filament. To change color, the carriage parks the active toolhead and picks up the next one. Steel-ball kinematic couplings and a mechanical lock seat it, with no extra motor. Snapmaker states a swap takes about 5 seconds.
What happens during a swap, from Snapmaker’s product page, FAQ and wiki:
- Locating. Steel-ball kinematic couplings guide the toolhead into the same position every time, and a mechanical latch holds it. Snapmaker says automatic calibration keeps the toolheads aligned within 0.04 mm.
- Docking check. Each parking bracket has a Hall sensor board that detects the magnet in a parked toolhead. Before every pickup the printer checks that all toolheads are docked and stops with a “toolhead detached” error if any is missing.
- Electrical contact. The toolhead connects through gold-plated pogo pins. Snapmaker rates the swapper for 1,000,000 swaps and each toolhead’s pins for 250,000. The printer counts swaps and asks you to clean the contacts every 100,000.
- Heat. Parked toolheads idle at about 70 °C and are preheated just before use. Snapmaker puts the extra standby draw of the three idle toolheads at 10 to 30 W.
- Prime tower. The U1 still prints a small prime tower. It clears the bit of degraded filament that sits in an idle nozzle, so “zero purge” means no purge between colors, not zero waste.
For how this compares with shared-nozzle filament changers such as Bambu Lab’s AMS, see toolchanger vs AMS.
What Snapmaker claims for speed and waste
Snapmaker advertises the U1 as “up to 5× faster” with “5× less waste” than single-nozzle filament switching. Both are manufacturer claims, not independent test results.
The product page backs them with Snapmaker’s own tests against an unnamed printer that switches filament through a shared nozzle. Snapmaker reports 70.6% faster and 85.1% less waste for a castle tower model, and 67.6% faster and 74.0% less waste for a dragon figure. Its waste count includes supports, the prime tower and calibration purges.
Snapmaker’s FAQ suggests checking the claims on your own model: slice it in OrcaSlicer with the U1 profile and again with your current printer’s profile, then compare the estimates.
Specifications
From Snapmaker’s specification page and FAQ:
| Spec |
Snapmaker U1 |
| Toolheads |
4 (one filament each) |
| Build volume |
270 × 270 × 270 mm |
| Max nozzle temperature |
300 °C |
| Max bed temperature |
100 °C |
| Stock hotends |
4 × 0.4 mm stainless steel, plus 1 spare |
| Max speed / acceleration |
500 mm/s / 20,000 mm/s² |
| Max hotend flow |
32 mm³/s |
| Motion |
CoreXY, carbon-fiber X rod |
| Enclosure |
Side panels, front door and rear cover standard; Top Cover sold separately |
| Firmware |
Klipper-based, with Moonraker and Fluidd |
| Slicer |
Snapmaker Orca, OrcaSlicer |
| Machine size / weight |
584 × 499 × 730 mm / 18.2 kg |
Out of the box the U1 handles PLA, PETG, TPU (90A and harder), PVA and PCTG. The optional Top Cover adds ABS, ASA, PA, PC and PET. It passively heats the chamber to 50 °C and filters the air through a HEPA12 and activated-carbon stack. Carbon- and glass-fiber filaments also need hardened steel hotends.
How much does the Snapmaker U1 cost, and is it in stock?
On October 14, 2026, Snapmaker’s US store listed the U1 at $749 (marked down from $999) and showed it in stock. The store’s shipping schedule says printer orders ship within 1 to 3 business days. The Top Cover, sold separately at $149, was quoted to ship to US buyers October 25 to 30.
| Item (Snapmaker US store, October 14, 2026) |
Price |
| 0.4 mm stainless steel hotend (single) |
$15.99 |
| Liber high-flow 0.4 mm hotend (single) |
$34.99 |
| Hardened steel hotend bundle (0.2, 0.4, 0.6 or 0.8 mm) |
$49.00 |
| Replacement toolhead (slot 1, or slots 2 to 4) |
$64.99 |
| Liber high-flow 0.4 mm hotend, 4-pack |
$99.00 |
| Top Cover |
$149.00 |
| Snapmaker U1 printer |
$749.00 |
The U1 is not pre-assembled. Snapmaker’s FAQ estimates about 120 minutes from unboxing to first print: 15 minutes unboxing, 40 minutes assembly and 65 minutes of setup and calibration.
The warranty is 1 year in the US and 2 years in the EU, Switzerland, Norway and Iceland. Printers shipped from June 2026 are locked at first activation to either the Mainland China or the International version, based on the shipping destination. The hardware is identical, but cloud services may not work outside the assigned region. Offline printing from USB is unaffected.
The U1 began as a Kickstarter campaign that ran from August 19 to September 30, 2025. Kickstarter’s project stats show it closed with 20,680 backers and $20,614,548 pledged.
Does the Snapmaker U1 run Klipper?
Yes. The U1 runs Snapmaker’s own firmware built on Klipper, with the Moonraker API server and the Fluidd web interface on top. Snapmaker published its modified source on GitHub on March 30, 2026, as u1-klipper, u1-moonraker and u1-fluidd, all under GPL-3.0. Some features are closed modules outside those repositories, among them flow calibration, defect detection and RFID filament recognition.
Snapmaker’s blog says about 20% of the Klipper codebase was changed for multi-toolhead control, bed leveling, filament handling and power-loss recovery. The latest firmware on October 14, 2026 was V2.0.0 (released September 15, 2026). Updates arrive over the air.
What you can access as a user:
- Fluidd and printer.cfg. Turn on Settings > Maintenance > Advanced Mode on the touchscreen, then open Fluidd in a browser to edit
printer.cfg. Snapmaker’s own wiki uses this to disable a faulty toolhead (extruder to extruder3 map to toolheads 1 to 4).
- Community firmware. SnapmakerU1-Extended-Firmware, by an independent developer not affiliated with Snapmaker, adds SSH and root access, a WebRTC camera stream and other extras. Its README warns that damage caused by custom firmware is not covered by warranty. Snapmaker’s region policy says damage from unofficial firmware may affect warranty coverage, reviewed case by case.
- No hotend PID tuning. The FAQ says hotend PID tuning (recalibrating the heater’s temperature control loop) is not supported.
What can you change on the Snapmaker U1?
You can swap hotends, nozzle sizes and whole toolheads. Each hotend is a one-piece unit, so you cannot replace the nozzle alone. You cannot add a fifth toolhead: the U1 prints at most four filaments per job. All toolheads in one print must use the same nozzle diameter.
- Hotends. Nozzle, heat break, heater block and heat sink form one press-fit unit. A hotend swap takes about 15 minutes with an H2.0 hex key: release the toolhead from the swapper, remove the rear cover, unplug two cables and undo two screws. Then run the multi-toolhead offset calibration, which takes 15 to 20 minutes. Toolchanger tool offsets explains what it measures.
- Nozzle sizes. Hardened steel hotends come in 0.2, 0.4, 0.6 and 0.8 mm.
- High-flow hotends. The Snapmaker x Phaetus Liber hotend is 0.4 mm and rated to 300 °C, sold singly or in a 4-pack. You can mix high-flow and standard hotends across toolheads. Snapmaker advises against high-flow printing with carbon-fiber, glass-fiber or wood-filled filaments, or with TPU.
- Whole toolheads. A complete replacement toolhead fits in about 8 minutes. Toolhead 1 is specific to the left slot, and toolheads 2 to 4 share a right-slot part.
- Enclosure. The Top Cover is the only official enclosure upgrade. Snapmaker does not recommend printing high-temperature and heat-sensitive filaments together, because the chamber cannot change temperature mid-print.
- More colors. There is no hardware route past four filaments. Snapmaker’s Full Spectrum (beta, in Snapmaker Orca) layers the four loaded filaments to simulate more colors.
StealthChanger vs Snapmaker U1
StealthChanger is an open-source toolchanger kit you add to a Voron 2.4 you build or already own. The U1 is a complete printer with four fixed toolheads. Choose the U1 for four filaments that work out of the box. Choose StealthChanger for more tools or a hotend of your choice, if you will assemble everything yourself. Figures below are from each maker’s documentation and US listings on October 14, 2026.
|
Snapmaker U1 |
StealthChanger on a Voron 2.4 |
| What you buy |
Complete printer |
Toolchanger parts for an existing Voron |
| Tools |
4, fixed |
Up to 4 to 6 on a 300 or 350 mm build, depending on toolhead width |
| Build volume |
270 × 270 × 270 mm |
Voron 2.4 in 250, 300 or 350 mm sizes; the docks cost some Z height |
| Price |
$749 including four hotends |
LDO kit $246.70 (1 tool) to $546.20 (6 tools) for 300 mm, without the printer, hotends, extruders or a larger power supply |
| Assembly |
About 40 minutes of assembly, 120 minutes to first print |
Build the Voron, then the toolchanger, toolboards and wiring |
| Firmware |
Snapmaker’s Klipper fork plus closed modules |
Klipper with the klipper-toolchanger-easy add-on |
| Toolheads |
Snapmaker U1 toolheads only |
Nine supported designs, such as Anthead, StealthBurner and XOL, with any compatible hotend and extruder |
The StealthChanger docs list 5 standard-width or 4 wide tools on a 300 mm Voron, and 6 or 5 on a 350 mm Voron. For other kits that convert existing printers, see Voron toolchanger options.
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