# Two Trees SK1: specs, SimplyPrint compatibility and setup > **Compatible** (We're sure). It's known to work with SimplyPrint, from documentation, the protocol or owners' prints. - By Two Trees, China - Launched January 2024 - Canonical page: https://simplyprint.io/compatibility/two-trees-sk1 ## Two Trees SK1 at a glance The Two Trees SK1 is a 3D printer by Two Trees with a 256 x 256 x 256 mm build volume. - Build volume: 256 x 256 x 256 mm - Enclosure: Partly enclosed - Motion system: CoreXY - Prints well: PLA, PETG, TPU & flexibles - Connectivity: Wi-Fi, USB ## Connect the Two Trees SK1 to SimplyPrint | Way of connecting | Status | What you need | Notes | | :--- | :--- | :--- | :--- | | SimplyPrint | Compatible | | Through Klipper (Moonraker) | | Klipper (Moonraker) | Compatible | Nothing extra: the printer runs Klipper as it ships | Ships Klipper with Moonraker and Fluidd: the maker's firmware guide says to open the Fluidd page at the printer's IP (MKS SKIPR board, KlipperScreen-style UI). ([Source](https://wiki.twotrees3d.com/en/3DPrinterSeries/SK1/Firmwarerefreshtutorial)) | | OctoPrint (Directly, over USB) | Not compatible | | Ships Klipper; OctoPrint only on top of it. ([Source](https://wiki.twotrees3d.com/en/3DPrinterSeries/SK1/Firmwarerefreshtutorial)); Ships with Klipper: OctoPrint only runs on top of it, through the OctoKlipper plugin | - [How to set up SimplyPrint on Two Trees SK1](https://simplyprint.io/setup-guide/two-trees/sk1.md) - [How to set up Mainsail on Two Trees SK1](https://docs.mainsail.xyz/setup) - [How to set up Fluidd on Two Trees SK1](https://docs.fluidd.xyz/installation) ### What works with SimplyPrint Connected through Klipper (Moonraker), SimplyPrint supports most of what it offers on the Two Trees SK1: the camera and AI failure detection, remote printing, skipping objects, temperature and movement control and AutoPrint. Not yet in SimplyPrint through Klipper (Moonraker): download the file before the print starts. ## What slicer to use for the Two Trees SK1 None of the slicers in SimplyPrint's cloud has a ready-made profile for the Two Trees SK1, but it takes standard G-code: start from a similar printer's profile and set the bed size, height and nozzle to match. - [PrusaSlicer](https://simplyprint.io/features/slicer/prusaslicer): No profile for the Two Trees SK1 · Runs in the SimplyPrint cloud - [OrcaSlicer](https://simplyprint.io/features/slicer/orcaslicer): No profile for the Two Trees SK1 · Runs in the SimplyPrint cloud - [BambuStudio](https://simplyprint.io/features/slicer/bambustudio): No profile for the Two Trees SK1 · Runs in the SimplyPrint cloud - [ElegooSlicer](https://simplyprint.io/features/slicer/elegooslicer): No profile for the Two Trees SK1 · Runs in the SimplyPrint cloud - [CrealityPrint](https://simplyprint.io/features/slicer/crealityprint): No profile for the Two Trees SK1 · Runs in the SimplyPrint cloud - [Cura](https://simplyprint.io/features/slicer/cura): No profile for the Two Trees SK1 · Runs in the SimplyPrint cloud - [Kiri:Moto](https://simplyprint.io/features/slicer/kirimoto): No profile for the Two Trees SK1 · Runs in the SimplyPrint cloud We only list slicers you can use in the SimplyPrint cloud, so there may be others for the Two Trees SK1. ## The app for the Two Trees SK1 Two Trees doesn't make an app for the Two Trees SK1. SimplyPrint works as its app: on your phone and in any browser, with a slicer in the cloud. - An app for iPhone and Android, the same in any browser, and a slicer in the cloud. - More than monitoring: a print queue, AI failure detection, AutoPrint and accounts for a team. - Printers from many brands in one place, side by side. - Hosted in Frankfurt, Germany, under the GDPR. [Connect the Two Trees SK1 to SimplyPrint, free](https://simplyprint.io/setup-guide/two-trees/sk1) · [App Store](https://apps.apple.com/app/simplyprint-3d/id1519749400) · [Google Play](https://play.google.com/store/apps/details?id=com.simplyprint.appdev) ## Automate the Two Trees SK1 **CoreXY printers push their prints off.** The Two Trees SK1's bed only moves up and down, so the usual way to automate it is a G-code routine that lets the toolhead push the cooled print off the front of the plate before the next job starts. ### Ways to automate it - [Push prints off with the toolhead](https://simplyprint.io/features/autoprint/push-off): On a CoreXY printer, a G-code routine can push the cooled print off the front of the plate before the next job starts. - [Your own ejection G-code](https://simplyprint.io/features/autoprint/custom): Write the routine that clears your plate, and AutoPrint runs it after every print. - [A robot arm, or anything with an API](https://simplyprint.io/features/autoprint/api): Tell SimplyPrint the plate is clear through the API or a webhook, from a robot arm or your own system. - [Clear it by hand, keep the queue](https://simplyprint.io/features/autoprint/manual-mode): AutoPrint waits for you to mark the plate clear, then starts the next job. [How AutoPrint works](https://simplyprint.io/features/autoprint). AutoPrint comes with the Pro plan and up. ## Two Trees SK1 specifications: bed size, print height and more ### Size - Build volume: 256 x 256 x 256 mm - Bed type: Square - Bed size: 256 x 256 mm - Max print height: 256 mm ### Printing - Enclosure: Partly enclosed - Motion system: CoreXY - Max extruder temperature: 300 °C - Has heated bed: Yes - Max bed temperature: 100 °C - Number of nozzles: 1 - Toolheads: 1 - Direct drive: Yes - Probing tool / Auto Bed Leveling: Yes - Filament width: 1.75 mm ### Multi-material - Toolchanger or hotend changer: No - IDEX (independent dual extruders): No ### Connecting - Connectivity: Wi-Fi, USB - Prints from: USB stick - Supports serial printing: No - Shipped firmware: Klipper ### Files and slicing - Supported file formats: G-code (.gcode, .gco, .g) ### The printer - Printer manufacturer / brand: Two Trees - Printer model name: SK1 - Made by a company from: China - Launched: January 2024 [Read more by the manufacturer](https://web.archive.org/web/20250808103426/https://twotrees3d.com/products/sk1-corexy-3d-printer-twotrees) ## What filament can the Two Trees SK1 print? Filament compatibility for the Two Trees SK1: the materials it can handle, judged from its hotend, bed, chamber and enclosure. | Filament | Suitability | Notes | | :--- | :--- | :--- | | PLA | Great | The easiest filament to print. Works on almost any printer; a heated bed helps adhesion but is not required. | | PETG | Great | Comfortably in range (PETG likes a ~230-250C hotend and a ~70-85C bed). | | TPU & flexibles | Great | The direct-drive extruder feeds flexible filament well. Print slowly for clean results. | | ABS & ASA | With care | The bed is hot enough, but ABS and ASA warp without an enclosure, which is strongly recommended for clean prints. | | Nylon (PA) | With care | Possible with care - an enclosure and very dry filament are essential. | | Polycarbonate (PC) | With care | On the edge - PC really wants an enclosed, hot chamber to avoid warping. | | Carbon-fiber & glass-filled | With care | Possible if you fit a hardened or wear-resistant nozzle - the abrasive fibers quickly wear a stock brass nozzle. | ### Best filament for the Two Trees SK1 Filaments the Two Trees SK1 prints well, Two Trees's own first, then the best known. - [Bambu Lab PLA Basic](https://simplyprint.io/filaments/bambu-lab/pla-basic): PLA, 190-230 °C - [Bambu Lab PLA Matte](https://simplyprint.io/filaments/bambu-lab/pla-matte): PLA, 190-230 °C - [SUNLU PLA](https://simplyprint.io/filaments/sunlu/pla): PLA, 190-230 °C - [Anycubic PETG](https://simplyprint.io/filaments/anycubic/petg): PETG, 230-250 °C - [Anycubic PLA Basic](https://simplyprint.io/filaments/anycubic/pla-basic): PLA, 190-230 °C - [Anycubic PLA Plus](https://simplyprint.io/filaments/anycubic/pla-plus): PLA, 190-230 °C - [Bambu Lab PETG Basic](https://simplyprint.io/filaments/bambu-lab/petg-basic): PETG, 230-260 °C - [Bambu Lab PETG HF](https://simplyprint.io/filaments/bambu-lab/petg-hf): PETG, 230-260 °C ## Compare the Two Trees SK1 with similar printers - [Snapmaker U1](https://simplyprint.io/compatibility/snapmaker-u1): Compatible, 270 x 270 x 270 mm, Similar build volume - [Flying Bear Ghost 6](https://simplyprint.io/compatibility/flying-bear-ghost-6): Compatible, 255 x 210 x 210 mm, Similar build volume - [Creality K3](https://simplyprint.io/compatibility/creality-k3): Expected to work, 260 x 260 x 260 mm, Similar build volume - [Bambu Lab P1S](https://simplyprint.io/compatibility/bambu-lab-p1s): Verified by SimplyPrint, 256 x 256 x 256 mm, Similar build volume - [Compare the Two Trees SK1 with other printers](https://simplyprint.io/compatibility/compare?compare=two-trees-sk1#choose) ## About Two Trees Two Trees (TwoTrees) is a Shenzhen maker of desktop fabrication machines, founded in 2017. It built budget 3D printers from 2018 (the Sapphire Pro and Sapphire Plus, and the Bluer) and launched the SK1, a Klipper-based CoreXY printer, at the end of 2023. By October 2026 its own stores sell CNC routers and laser engravers; the 3D printer section lists no printers, and only spare parts for the SK1 remain. Its printers were bought mostly by hobbyists who like to tinker. - Founded: 2017 - Headquarters: Shenzhen, China - Ownership: Parent company: Shenzhen TwoTrees Holdings Co., Ltd. - Website: https://twotrees3d.com Openness: Mostly open (3.9 of 5) Open in practice: the SK1 runs stock Klipper with no cloud, and the older printers ran Marlin. The weak spot is support rather than lock-in: Two Trees has moved on to CNC and laser machines, documentation is thin and some SK1 parts are hard to find. - Firmware and custom firmware (4 of 5): Tom's Hardware found the SK1 runs unmodified ('vanilla') Klipper, which is open source and replaceable. For the older Sapphire printers, a GitHub account named TwoTrees-china published Marlin 2.0 source for their MKS Robin Nano board in 2020 (not updated since), and upstream Klipper ships configs for the Sapphire Pro and Sapphire Plus. - Local control and integrations (5 of 5): Tom's Hardware found the SK1 runs vanilla Klipper: files and settings are reachable from a computer on the home network, files can also go by USB stick, and there is no cloud or phone app to use. Klipper's standard web stack, Moonraker, documents its API, so other software can control the printer locally. - Third-party filament, slicers and parts (3 of 5): Any 1.75 mm filament and any slicer (Cura and PrusaSlicer profiles come on the SK1's USB stick). But the SK1's hotend copies Bambu Lab's design with a small separate nozzle, which Tom's Hardware found hard to source. - Repairs and spare parts (3 of 5): Two Trees' store still sells SK1 parts: mainboard, heated bed, touchscreen, fans, PEI plate and power adapter, and it published a printable SK1 extruder kit on GitHub. Tom's Hardware found nozzles and hotends hard to find, and we found none listed in the store. - Community and documentation (2 of 5): Tom's Hardware called the SK1's documentation sparse. Two Trees has a wiki and a download page, now centred on its CNC and laser machines; beyond that, owners rely on upstream projects such as Klipper. ### Pros - The SK1 runs stock Klipper: control it from a browser on your own network, with no account or cloud. - Open-source firmware, so the SK1 can be modified and tuned freely. - Common SK1 spare parts (mainboard, heated bed, touchscreen, fans) are still sold by Two Trees. - Works with any 1.75 mm filament and any slicer; Cura and PrusaSlicer profiles are included. ### Cons - Two Trees no longer lists any 3D printer in its own stores; it now focuses on CNC routers and laser engravers. - Sparse documentation for the SK1, per Tom's Hardware. - The SK1's Bambu-style hotend and nozzle are hard to source. - Tom's Hardware found typos and wrong-language menus on the SK1 touchscreen. ### Track record - February 2026: By February 2026 the 3D printer page of Two Trees' US store listed no products; in October 2025 it still showed the SK1 (Internet Archive captures). In October 2026 the store sells CNC routers and lasers, plus SK1 spare parts. - October 2024: Two Trees published a redesigned SK1 extruder kit (filament cutter, consumable detection) on GitHub under GPL-3.0, with firmware and printable STL files. - 2023: Two Trees introduced the SK1, its first high-speed CoreXY printer, at the end of 2023. How Two Trees compares with every other brand: https://simplyprint.io/articles/best-3d-printer Affiliate disclosure: Some links on this page are affiliate links. We may earn a commission if you make a purchase, at no extra cost to you. As an Amazon Associate, we earn from qualifying purchases. ## Frequently asked questions ### Is the Two Trees SK1 compatible with SimplyPrint? Yes. You can connect the Two Trees SK1 to SimplyPrint via Klipper (Moonraker), then slice, queue, start and monitor prints from your browser or the mobile app. ### How do I connect the Two Trees SK1 to SimplyPrint? Follow our step-by-step setup guide for the Two Trees SK1. It shows how to connect it via Klipper (Moonraker), what you need for each, and which to pick. ### What slicer should I use for the Two Trees SK1? Cura, PrusaSlicer and OrcaSlicer all work with the Two Trees SK1, and you can run any of them in SimplyPrint's online browser slicer - no install needed, on any device. ### Can I use OrcaSlicer with the Two Trees SK1? Yes, but OrcaSlicer has no built-in profile for the Two Trees SK1 that we know of: start from a similar printer's profile and set the bed size, height and nozzle to match. ### What filament can the Two Trees SK1 print? Based on its specs (hotend up to 300C, heated bed up to 100C), the Two Trees SK1 handles PLA, PETG, or TPU & flexibles well. See the full filament guide above for ABS, nylon, PC and composites. ### Does the Two Trees SK1 work with OctoPrint or Klipper? The Two Trees SK1 works with Klipper (Mainsail and Fluidd), and SimplyPrint connects to it through them - so you get cloud access, a queue and camera monitoring on top. ### What is the Two Trees SK1's bed size and build volume? The Two Trees SK1 has a 256 x 256 mm print bed and prints up to 256 mm tall, a build volume of about 256 x 256 x 256 mm. See the full specifications table above for bed type, temperatures and more. ### When did the Two Trees SK1 come out? Two Trees launched the SK1 in January 2024. ### Can the Two Trees SK1 eject prints automatically? There's no kit for it that we support yet, but SimplyPrint's AutoPrint can push prints off with the toolhead, or run your own ejection G-code, and then start the next job from your queue. --- © 2026 SimplyPrint. All rights reserved. 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