Does the Longer LK5 Pro 3D printer work with SimplyPrint, OctoPrint, Mainsail and Fluidd?
Each way of connecting it, what it needs, and how to set it up.
Doesn't ship with Klipper: it runs Klipper after you install it in place of its own firmware, a modification
What works with SimplyPrint
Connected through OctoPrint, SimplyPrint supports everything the Longer LK5 Pro lets other software do: the camera and AI failure detection, remote printing, temperature and movement control and AutoPrint. 3 features depend on how it's set up: the table says what each needs.
Every SimplyPrint feature, for each way of connecting it to SimplyPrint
Connected to SimplyPrint through
SimplyPrint feature
OctoPrint
Compatible
Monitoring
Live status and progress
Yes
Webcam
Yes1
AI failure detection
Yes1
Time left
Yes
Layer progress
Yes
Temperatures
Yes
Printing
Starting a print
Yes
Pause, resume and cancel
Yes
Skip objects
Depends2
Files
Print binary G-code (.bgcode)
Depends3
Printer control
Change temperatures
Yes
Moving with the controls
Yes
Homing
Yes
Extrude and retract
Yes
Change print speed
Yes
Fan speed
Yes
Baby stepping
Yes
Send G-code
Yes
Calibration
Change filament
Yes
Bed leveling
Yes
Z-Offset Calibration
Yes
Automation
AutoPrint
Pro
Yes
Download the file before the print starts
Depends4
Connected to SimplyPrint through OctoPrint
Compatible
Monitoring
Live status and progressYes
WebcamYes1
AI failure detectionYes1
Time leftYes
Layer progressYes
TemperaturesYes
Printing
Starting a printYes
Pause, resume and cancelYes
Skip objectsDepends2
Files
Print binary G-code (.bgcode)Depends3
Printer control
Change temperaturesYes
Moving with the controlsYes
HomingYes
Extrude and retractYes
Change print speedYes
Fan speedYes
Baby steppingYes
Send G-codeYes
Calibration
Change filamentYes
Bed levelingYes
Z-Offset CalibrationYes
Automation
AutoPrint ProYes
Download the file before the print startsDepends4
Works
Depends
Not supported
Needs a camera
Requires the OctoPrint plugin Cancel Objects
Requires the OctoPrint plugin BGCode
Requires version 4.2.0 or newer of the SimplyPrint plugin
Longer LK5 Pro owners on SimplyPrint
10+ printers use SimplyPrint
What slicer to use for the Longer LK5 Pro
Use Cura: it has a ready-made profile for the Longer LK5 Pro.
We only list slicers you can use in the SimplyPrint cloud, so there may be others for the Longer LK5 Pro.
Cloud-Based Slicer for Longer LK5 Pro: Use Cura Online
Use Cura and other slicers - directly in your browser with SimplyPrint's online cloud slicer. No installation required. Slice your Longer LK5 Pro models from any device, anywhere in the world!
Automatic Profile Updates: Profiles are automatically checked and fetched from the slicer GitHub repositories every day, as well as from our own open-source community-driven slicer profile database. This ensures you always have access to the latest profiles.
Note: Other slicers, such as Simplify3D, ideaMaker, SuperSlicer and KISSlicer, aren't in our cloud, so we don't track their profiles. They may still work well with your Longer LK5 Pro: check the slicer's own documentation or forums for a profile. You can also contribute profiles to our open-source slicer profile database on GitHub.
The app for the Longer LK5 Pro
SimplyPrint works as the Longer LK5 Pro's app: on your phone and in any browser, with a slicer in the cloud.
There's no plate swapper or auto-ejection kit for the Longer LK5 Pro in SimplyPrint yet, but AutoPrint can still keep it printing: once the plate is clear, it starts the next job from your queue.
Ways to automate it
Your own ejection G-codeWrite the routine that clears your plate, and AutoPrint runs it after every print.
Longer LK5 Pro specifications: bed size, print height and more
Its size, temperatures, multi-material and how it connects, from the maker and our own research.
Read more by the manufacturer
Size
Build volume
300 x 300 x 400 mm
Bed type
Square
Bed size
300 x 300 mm
Max print height
400 mm
Printing
Max print speed
120 mm/s
Max extruder temperature
250 °C
Has heated bed
Yes
Max bed temperature
100 °C
Number of nozzles
1
Direct drive
No
Probing tool / Auto Bed Leveling
No
Filament width
1.75 mm
Connecting
Connectivity
SD card
Built-in camera
No
Prints from
microSD card
Supports serial printing
Yes
Shipped firmware
Marlin
Files and slicing
Supported file formats
G-code (.gcode, .gco, .g)
The printer
Printer manufacturer / brand
Longer
Printer model name
LK5 Pro
Made by a company from
China
Launched
2021
Still made
Yes
Disclaimer:
We strive to keep this information as current and accurate as possible, but cannot guarantee its completeness or reliability. Our data is based on user submissions and manufacturer references.
What filament can the Longer LK5 Pro print?
Filament compatibility for the Longer LK5 Pro: the materials Longer lists for it.
Filament
Suitability
Notes
PLA
Great
On the maker's list of materials for this printer.
PETG
Great
Comfortably in range (PETG likes a ~230-250C hotend and a ~70-85C bed).
TPU & flexibles
With care
Possible, but a Bowden extruder makes flexibles harder - print slowly and prefer firmer (higher-shore) TPU.
ABS & ASA
Great
On the maker's list of materials for this printer.
Nylon (PA)
With care
Possible with care - an enclosure and very dry filament are essential.
Polycarbonate (PC)
Not ideal
Not recommended - PC needs very high hotend temps and an enclosed chamber.
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.
Tip: this is a general guide from the printer's specs - always check your filament's recommended settings. With SimplyPrint you can save a profile for each spool and track exactly what filament you have in stock.
Best filament for the Longer LK5 Pro
Filaments the Longer LK5 Pro prints well, Longer's own first, then the best known.
Printers from the same maker, of a similar size, printing the same engineering materials or multi-material like it, that you can buy today. Compare up to four side by side, with their specs and how each connects.
Who makes the Longer LK5 Pro, and how open Longer leaves you: whether its printers run without its cloud, take any filament and slicer, and can be repaired. Each area is rated from public sources.
Openness: Mixed (3.4 of 5)
Mixed
Walled gardenOpen
Longer (Shenzhen Longer 3D Technology Co., Ltd.) is a Chinese maker of budget FDM and resin 3D printers, laser engravers and UV printers. Its LK series of open-frame bed slingers, up to the LK5 Pro it still sells, is aimed at beginners, and it also built the Alfawise U20 and U30 sold under another name. In 2026 it added the LK10 and LK10 Plus, which run on a Klipper board.
Headquarters:
Shenzhen, China ·
Ownership:
Shenzhen Longer 3D Technology Co., Ltd., privately held ·
Website:www.longer.net
Published Marlin source, spare parts and slicer support for the older LK line; we found no published source for the new Klipper-based LK10.
Firmware and custom firmware ●●●●●
Longer published Marlin source for the LK1, LK4 Pro and LK5 Pro on GitHub (GPL-3.0, last updated 2022) and Klipper configs for older models (updated 2024). We found no source for the LK10's Klipper firmware.
[9][10][11]
Third-party filament, slicers and parts ●●●●●
Any filament, and no Longer slicer is required: Cura ships profiles for the LK1 to LK5 Pro and OrcaSlicer for the LK10 and LK10 Plus. Longer sells nozzle kits and hotend parts; we did not confirm which third-party nozzles fit.
[12][13][6]
Repairs and spare parts ●●●●●
Longer's shop sells LK-series mainboards, touch screens, heated beds, stepper motors, extruders, fans and nozzle kits; it publishes no CAD files.
[6]
Community and documentation ●●●●●
Longer runs a download centre with firmware, slicer builds and manuals, and a GitHub account with firmware source and Klipper configs; we found no official forum.
[7][8]
Pros
Low prices for simple, beginner-oriented printers.
Marlin source published for the LK5 Pro and older models.
Spare parts sold, from mainboards to nozzles.
Profiles in both Cura and OrcaSlicer.
Cons
No published source for the new LK10's Klipper firmware.
The LK5 Pro's firmware has not been updated since February 2022.
No official forum or community documentation hub found.
Track record
2026: Longer launched the LK10 and LK10 Plus, bed slingers on a Klipper board rated up to 500 mm/s.
[3][4]
February 2022: Longer released LK5 Pro firmware V0.4.0, based on Marlin 2; in October 2026 it was still the newest LK5 Pro firmware in Longer's download centre.
[7]
November 2020: Longer published the Marlin source for the LK1, LK4 Pro and LK5 Pro on GitHub under the GPL-3.0.
[9]
Researched from 13 sources, last checked October 18, 2026. Show sources
Is the Longer LK5 Pro compatible with SimplyPrint?
Yes. You can connect the Longer LK5 Pro to SimplyPrint via OctoPrint, then slice, queue, start and monitor prints from your browser or the mobile app.
How do I connect the Longer LK5 Pro to SimplyPrint?
Follow our step-by-step setup guide for the Longer LK5 Pro. It shows how to connect it via OctoPrint, what you need for each, and which to pick.
What slicer should I use for the Longer LK5 Pro?
We recommend Cura for the Longer LK5 Pro. You can run it, and 6 other slicers, directly in SimplyPrint's online slicer - no install, on any device, with profiles for the Longer LK5 Pro kept up to date automatically.
Can I use OrcaSlicer with the Longer LK5 Pro?
Yes, but OrcaSlicer has no built-in profile for the Longer LK5 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 Longer LK5 Pro print?
Longer lists PLA and ABS & ASA for the LK5 Pro.
Does the Longer LK5 Pro work with OctoPrint or Klipper?
The Longer LK5 Pro works with OctoPrint, and SimplyPrint connects to it through them - so you get cloud access, a queue and camera monitoring on top.
What is the Longer LK5 Pro's bed size and build volume?
The Longer LK5 Pro has a 300 x 300 mm print bed and prints up to 400 mm tall, a build volume of about 300 x 300 x 400 mm. See the full specifications table above for bed type, temperatures and more.
When did the Longer LK5 Pro come out?
Longer launched the LK5 Pro in 2021.
Can the Longer LK5 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 Longer LK5 Pro?
From Longer's own store, which has shops for everywhere else. 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.
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.
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