# FLSUN S1 Pro: specs, SimplyPrint compatibility and setup > **Compatible** (We're sure). It's known to work with SimplyPrint, from documentation, the protocol or owners' prints. - By FLSUN, China - Launched 2024 - Canonical page: https://simplyprint.io/compatibility/flsun-s1-pro ## FLSUN S1 Pro at a glance The FLSUN S1 Pro is a 3D printer by FLSUN with a 320 x 320 x 430 mm build volume. - Build volume: 320 x 320 x 430 mm - Enclosure: Fully enclosed - Max print speed: 1200 mm/s - Motion system: Delta - Prints well: PLA, PETG, TPU & flexibles, ABS & ASA, Nylon (PA), Polycarbonate (PC), Carbon-fiber & glass-filled - Built-in camera: Yes - Connectivity: Wi-Fi, USB ## Connect the FLSUN S1 Pro 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 | FLSUN publishes the S1 Pro's Klipper and Moonraker; SimplyPrint's T1/S1 guide applies (some units need a CA certificate update over SSH first). ([Source](https://github.com/FLSUN3D/S1-pro)); Requires an update of the printer's SSL certificates | | OctoPrint (Directly, over USB) | Not compatible | | Ships Klipper; its USB is internal, so OctoPrint runs only on top of Klipper. ([Source](https://github.com/FLSUN3D/S1-pro)); Ships with Klipper: OctoPrint only runs on top of it, through the OctoKlipper plugin | - [How to set up SimplyPrint on FLSUN S1 Pro](https://simplyprint.io/setup-guide/flsun/s1-pro.md) - [How to set up Mainsail on FLSUN S1 Pro](https://docs.mainsail.xyz/setup) - [How to set up Fluidd on FLSUN S1 Pro](https://docs.fluidd.xyz/installation) ### What works with SimplyPrint Connected through Klipper (Moonraker), SimplyPrint supports most of what it offers on the FLSUN S1 Pro: 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 FLSUN S1 Pro None of the slicers in SimplyPrint's cloud has a ready-made profile for the FLSUN S1 Pro, 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 FLSUN S1 Pro · Runs in the SimplyPrint cloud - [OrcaSlicer](https://simplyprint.io/features/slicer/orcaslicer): No profile for the FLSUN S1 Pro · Runs in the SimplyPrint cloud - [BambuStudio](https://simplyprint.io/features/slicer/bambustudio): No profile for the FLSUN S1 Pro · Runs in the SimplyPrint cloud - [ElegooSlicer](https://simplyprint.io/features/slicer/elegooslicer): No profile for the FLSUN S1 Pro · Runs in the SimplyPrint cloud - [CrealityPrint](https://simplyprint.io/features/slicer/crealityprint): No profile for the FLSUN S1 Pro · Runs in the SimplyPrint cloud - [Cura](https://simplyprint.io/features/slicer/cura): No profile for the FLSUN S1 Pro · Runs in the SimplyPrint cloud - [Kiri:Moto](https://simplyprint.io/features/slicer/kirimoto): No profile for the FLSUN S1 Pro · Runs in the SimplyPrint cloud We only list slicers you can use in the SimplyPrint cloud, so there may be others for the FLSUN S1 Pro. ## The app for the FLSUN S1 Pro SimplyPrint works as the FLSUN S1 Pro's 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 FLSUN S1 Pro to SimplyPrint, free](https://simplyprint.io/setup-guide/flsun/s1-pro) · [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 FLSUN S1 Pro ### Ways to automate it - [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. ## FLSUN S1 Pro specifications: bed size, print height and more ### Size - Build volume: 320 x 320 x 430 mm - Bed type: Circle - Bed size: 320 mm diameter - Max print height: 430 mm ### Printing - Enclosure: Fully enclosed - Motion system: Delta - Max print speed: 1200 mm/s - Max extruder temperature: 350 °C - Has heated bed: Yes - Max bed temperature: 120 °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 - Built-in camera: Yes - 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: FLSUN - Printer model name: S1 Pro - Made by a company from: China - Launched: 2024 [Read more by the manufacturer](https://flsun3d.com/pages/s1-pro) ## What filament can the FLSUN S1 Pro print? Filament compatibility for the FLSUN S1 Pro: the materials FLSUN lists for it. | Filament | Suitability | Notes | | :--- | :--- | :--- | | PLA | Great | On the maker's list of materials for this printer. | | PETG | Great | On the maker's list of materials for this printer. | | TPU & flexibles | Great | On the maker's list of materials for this printer. | | ABS & ASA | Great | On the maker's list of materials for this printer. | | Nylon (PA) | Great | On the maker's list of materials for this printer. | | Polycarbonate (PC) | Great | On the maker's list of materials for this printer. | | Carbon-fiber & glass-filled | Great | On the maker's list of materials for this printer. | ### Best filament for the FLSUN S1 Pro Filaments the FLSUN S1 Pro prints well, FLSUN'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 - [ELEGOO PLA](https://simplyprint.io/filaments/elegoo/pla): PLA, 190-220 °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 ABS](https://simplyprint.io/filaments/bambu-lab/abs): ABS, 240-270 °C ## What reviewers say about the FLSUN S1 Pro - [FLSUN S1 Pro Review: Delta 3D Printer at 1200mm/s, 40,000mm/s² Acceleration, 110mm³/s Flow](https://www.youtube.com/watch?v=lC2WMuoT-Pw) (Aurora Tech, February 28, 2025): Tested against the Sovol SV08, K2 Plus, P1P and Core One. Finds the speed truly impressive (over 600 mm/s with default profiles, at least twice as fast as most Klipper machines) but fine tolerances suffer at top speed. Cons: skinned Orca slicer, minor firmware issues, large footprint. Names it the fastest midsize printer on his list. ## Compare the FLSUN S1 Pro with similar printers - [FLSUN S1](https://simplyprint.io/compatibility/flsun-s1): Compatible, 320 x 320 x 430 mm, Also by FLSUN · Similar build volume · Also prints ABS & ASA, Nylon (PA), Polycarbonate (PC) - [Bambu Lab H2S Combo](https://simplyprint.io/compatibility/bambu-lab-h2s-combo): Verified by SimplyPrint, 340 x 320 x 340 mm, Similar build volume · Also prints ABS & ASA, Nylon (PA), Polycarbonate (PC), Carbon-fiber & glass-filled - [Bambu Lab H2D Combo](https://simplyprint.io/compatibility/bambu-lab-h2d-combo): Verified by SimplyPrint, 325 x 320 x 325 mm, Similar build volume · Also prints ABS & ASA, Nylon (PA), Polycarbonate (PC), Carbon-fiber & glass-filled - [Creality K2 Plus Combo](https://simplyprint.io/compatibility/creality-k2-plus-combo): Compatible, 350 x 350 x 350 mm, Similar build volume · Also prints ABS & ASA, Nylon (PA), Polycarbonate (PC) - [Compare the FLSUN S1 Pro with other printers](https://simplyprint.io/compatibility/compare?compare=flsun-s1-pro#choose) ## Where to buy the FLSUN S1 Pro - [FLSUN for the EU](https://simplyprint.io/buy/8308) (Official store) - [FLSUN for the US](https://simplyprint.io/buy/8307) (Official store) ## About FLSUN FLSUN is the printer brand of Zhengzhou Chaokuo Electronic Technology, a Chinese company founded in 2015. Since 2017 it has made only delta printers, built for speed: the open-frame T1 series, the enclosed S1 and the large V400 Max all run Klipper. They suit people who print tall parts or want fast prints and are willing to tune a delta. - Founded: 2015 - Headquarters: Zhengzhou, Henan, China - Ownership: Brand of Zhengzhou Chaokuo Electronic Technology Co., Ltd., privately held - Website: https://flsun3d.com Openness: Mostly open (4.2 of 5) Fairly free to use as you like: Klipper with a local web interface, OrcaSlicer support and a deep spare-parts catalogue. The firmware source came late, as one-time uploads. - Firmware and custom firmware (4 of 5): The S and T series run Klipper, which Tom's Hardware found close to stock on the S1. FLSUN uploaded the Klipper and Moonraker code for the S1, S1 Pro, T1, T1 Pro, T1 Max and T1E to GitHub in August 2025, more than a year after the S1 shipped, as one-time uploads rather than maintained repositories. - Local control and integrations (5 of 5): The S1 and T1 series run Klipper with a stock Mainsail interface on the local network, with no account; FLSUN put the printers' Klipper and Moonraker code on GitHub in 2025, and other software can use Moonraker's documented API. FLSUN's app and web platform add remote control and fleet management. - Third-party filament, slicers and parts (4 of 5): Any filament works, and OrcaSlicer ships profiles for the S1, T1 and V400 next to FLSUN's own OrcaSlicer-based slicer (published under the AGPL). The S1 takes a standard removable V6-type nozzle, but effectors and hotend kits are FLSUN delta parts. - Repairs and spare parts (4 of 5): FLSUN's US shop lists over 100 spare parts for the S, T and V400 series, down to motherboards, effectors, parallel arms, screens, motors and belts. We found no published CAD for the current printers. - Data and privacy (3 of 5): Printing over Klipper needs no account. FLSUN's app does, and its privacy policy describes collecting device data, location signals and usage, without saying where the data is stored. ### From SimplyPrint Our own experience working with FLSUN. It isn't part of the rating. - When an FLSUN owner had a problem with SimplyPrint, one of FLSUN's developers spent over an hour in our live chat with our developers, working it out together. ### Pros - Fast delta printers that suit tall parts. - Klipper with a Mainsail web interface on your own network, no account needed. - Large spare-parts catalogue, down to boards, arms and effectors. - OrcaSlicer has FLSUN profiles, so you are not tied to FLSUN's slicer. ### Cons - Firmware source arrived late and as one-time uploads, not maintained repositories. - Reviewers found the S1 needed slicer tuning for accurate prints and measured the T1 Pro louder than advertised. - Tom's Hardware did not recommend the S1 for beginners. - The privacy policy does not say where app data is stored. ### Track record - August 2025: FLSUN published the Klipper and Moonraker code for the S1, S1 Pro, T1, T1 Pro, T1 Max and T1E as separate GitHub repositories, uploaded between 8 and 21 August 2025. - May 2024: FLSUN published the source of FlsunSlicer, its OrcaSlicer-based slicer, on GitHub under the AGPL-3.0. - October 2022: FLSUN published the Klipper and Moonraker builds for the V400's Speeder Pad on GitHub under the GPL-3.0. - March 2021: FLSUN launched the Super Racer (SR), the delta that it says first brought it wide attention. - 2017: FLSUN says it dropped over 90% of its product lines to build only delta printers, and that its revenue fell by 80% as a result. How FLSUN 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 FLSUN S1 Pro compatible with SimplyPrint? Yes. You can connect the FLSUN S1 Pro to SimplyPrint via Klipper (Moonraker), then slice, queue, start and monitor prints from your browser or the mobile app. ### How do I connect the FLSUN S1 Pro to SimplyPrint? Follow our step-by-step setup guide for the FLSUN S1 Pro. 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 FLSUN S1 Pro? Cura, PrusaSlicer and OrcaSlicer all work with the FLSUN S1 Pro, 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 FLSUN S1 Pro? Yes, but OrcaSlicer has no built-in profile for the FLSUN S1 Pro 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 FLSUN S1 Pro print? FLSUN lists PLA, PETG, TPU & flexibles, ABS & ASA, Nylon (PA), Polycarbonate (PC) and Carbon-fiber & glass-filled for the S1 Pro. ### Does the FLSUN S1 Pro work with OctoPrint or Klipper? The FLSUN S1 Pro 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 FLSUN S1 Pro's bed size and build volume? The FLSUN S1 Pro has a 320 x 320 mm print bed and prints up to 430 mm tall, a build volume of about 320 x 320 x 430 mm. See the full specifications table above for bed type, temperatures and more. ### When did the FLSUN S1 Pro come out? FLSUN launched the S1 Pro in 2024. ### Can the FLSUN S1 Pro eject prints automatically? There's no kit for it that we support yet, but SimplyPrint's AutoPrint can run your own ejection G-code, work with a robot arm through the API, or wait for you to clear the plate, and then start the next job from your queue. ### Where can I buy the FLSUN S1 Pro? From FLSUN's own store, which has shops for the EU and the US. The links on this page go to those stores; some are affiliate links, so we may earn a commission at no extra cost to you. --- © 2026 SimplyPrint. All rights reserved. This page and the compatibility, specification and review data on it are compiled by SimplyPrint and may not be copied, scraped, reproduced or republished, in whole or in part, without prior written permission. Printer images are the property of their respective manufacturers and are shown for identification purposes only; SimplyPrint claims no ownership of them. Quoted reviews belong to their authors.