Markforged's largest printer: a 525 x 400 x 400 mm build volume with a heated chamber up to 200 °C that can print ULTEM 9085 and Vega. It is made for aerospace and other high-temperature industrial parts.
Does the Markforged FX20 3D printer work with SimplyPrint, OctoPrint, Mainsail and Fluidd?
Each way of connecting it, what it needs, and how to set it up.
The maker's cloud
Possible, not built yet
Cloud-only printer: it prints from Markforged's Eiger platform, which has an API. SimplyPrint can build support through that API if enough people vote for it.
Source
Markforged FX20 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
525 x 400 x 400 mm
Bed type
Rectangle
Bed size
525 x 400 mm
Max print height
400 mm
Printing
Enclosure
Fully enclosed
Max extruder temperature
360 °C
Has heated bed
No
Heated chamber
Up to 200 °C
Number of nozzles
1
Toolheads
3
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
Ethernet
Supports serial printing
No
Shipped firmware
The maker's own
The printer
Printer manufacturer / brand
Markforged
Printer model name
FX20
Made by a company from
USA
Launched
April 2022
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 Markforged FX20 print?
Filament compatibility for the Markforged FX20: the materials Markforged lists for it.
It prints only Markforged's own materials.
Filament
Suitability
Notes
PLA
Not ideal
Not on the maker's list, and this printer prints only the maker's own materials.
PETG
Not ideal
Not on the maker's list, and this printer prints only the maker's own materials.
TPU & flexibles
Not ideal
Not on the maker's list, and this printer prints only the maker's own materials.
ABS & ASA
Not ideal
Not on the maker's list, and this printer prints only the maker's own materials.
Nylon (PA)
Great
On the maker's list of materials for this printer.
Polycarbonate (PC)
Not ideal
Not on the maker's list, and this printer prints only the maker's own materials.
Carbon-fiber & glass-filled
Great
On the maker's list of materials for this printer.
High-temperature (PEI, PEEK, PEKK)
Great
On the maker's list of materials for this printer.
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.
When to choose the Markforged FX20
Choose it for big, high-temperature parts that the FX10's 60 °C chamber and 375 x 300 x 300 mm bed can't handle. If your parts fit in the FX10 and you don't need ULTEM or Vega, the FX10 or X7 take far less floor space.
Pros
Biggest build volume Markforged makes: 525 x 400 x 400 mm.
Heated chamber up to 200 °C, with ULTEM 9085 and Vega as well as Onyx and continuous carbon fiber.
XL spools hold four times the material, so long prints need fewer spool changes.
Linear encoders give closed-loop motion control.
7-inch touchscreen controls the whole printer.
Cons
Not supported by SimplyPrint yet: it can be built on Markforged's cloud API if enough people vote for it.
Runs Markforged's closed firmware with Eiger, so there is no OctoPrint or Klipper route.
Weighs 530 kg and measures 1325 x 900 x 1925 mm, so it needs a prepared room and a 200-240 V supply.
Connects through Ethernet only; the datasheet lists no Wi-Fi.
Who it suits
SchoolsNot a good fit
A 530 kg industrial printer is out of scope for a classroom.
HobbyistsNot a good fit
Industrial machine with closed firmware and no third-party route.
BusinessesGreat fit
Large, heated-chamber production printer for high-temperature composite parts.
Print farmsCan work
Eiger can manage a fleet of Markforged printers, but SimplyPrint cannot manage the FX20 today.
Printers like the Markforged FX20 that work with SimplyPrint
Printers from the same maker, of a similar size, printing the same engineering materials or multi-material like it, that you can buy today and that we know work with SimplyPrint.
Who makes the Markforged FX20, and how open Markforged 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: Walled garden (1.3 of 5)
Walled garden
Walled gardenOpen
Markforged is an American maker of industrial 3D printers, founded in 2013 near Boston, known for nylon parts reinforced with continuous carbon fibre and for metal printing. Printers, materials and its cloud software Eiger are sold together as one closed platform to manufacturers, defence and aerospace. Nano Dimension bought it in April 2025, and in May 2026 agreed to sell it to Stratasys.
Founded:
2013 ·
Headquarters:
Waltham, Massachusetts, US ·
Ownership:
Subsidiary of Nano Dimension since April 2025; sale to Stratasys agreed in May 2026, still pending in August 2026 ·
Website:markforged.com
Closed by design: proprietary firmware, Markforged-only materials and cloud slicing, for industrial buyers who want one supported, secure system.
Firmware and custom firmware ●●●●●
Closed firmware, updated over the air through Eiger; no source is published and no custom firmware is supported.
[2]
Local control and integrations ●●●●●
Markforged printers are sliced and run through Eiger, its cloud software, by default, and Eiger is the only slicer they accept. Sites that cannot use the cloud can pay for Offline Eiger, which works over USB or a private network. APIs for linking other enterprise systems come with Eiger Fleet, a paid cloud subscription. We found no local interface for other software.
[2][6][16]
Third-party filament, slicers and parts ●●●●●
Markforged printers use only Markforged materials (Onyx, continuous fibres, metals) and only Eiger for slicing.
[2][3]
Repairs and spare parts ●●●●●
Replacement print heads, extruders and nozzle parts are sold through Markforged resellers, mostly as assemblies (a Mark Two print head lists at over 1,400 pounds), and some come free under service ('Success') plans.
[13][14]
Data and privacy ●●●●●
Eiger accounts hold your parts library and print jobs on AWS, encrypted, with two-factor login and ISO 27001 certification, and the privacy policy says what is collected. Offline Eiger keeps the data on site.
[4][5][2][6]
Pros
Prints parts reinforced with continuous carbon fibre, Kevlar or fibreglass, strong enough to replace some machined parts.
One supported system: printers, materials and software from one company, with ISO 27001 certification.
Offline Eiger available for sites that cannot use the cloud.
The FX10 prints both composites and metal.
Cons
Only Markforged materials and the Eiger slicer; no third-party filament.
Cloud first: the offline option is a separate subscription.
Ownership in flux: bought by Nano Dimension in 2025, with a sale to Stratasys pending in 2026.
Layoffs in 2023 and a $25 million patent settlement in 2024.
Track record
May 27, 2026: Stratasys agreed to buy MarkForged, Inc. from Nano Dimension for $42.5 million in cash; Nano Dimension keeps the metal binder jetting line. Closing was expected in the second half of 2026, and Stratasys still called it pending in August 2026.
[9][10]
April 25, 2025: Nano Dimension completed its acquisition of Markforged, valued at $116 million ($5.00 per share).
[8]
September 2024: Markforged settled Continuous Composites' patent suit, filed in 2021, by agreeing to pay $25 million over four years, with cross-licences; neither side admitted liability.
[11][12]
April 2024: A Delaware jury found that Markforged infringed a Continuous Composites patent on continuous-fibre printing; Markforged attempted to appeal before settling.
[12]
November 2023: Markforged announced a restructuring, mostly an approximately 10% headcount reduction, citing continuing economic headwinds.
[7]
September 2022: Markforged said its Offline Eiger subscription, which runs fully offline, had received a year of quarterly updates with the same materials and features as the cloud version.
[6]
Researched from 16 sources, last checked October 18, 2026. Show sources
Is the Markforged FX20 compatible with SimplyPrint?
Not yet. The maker's software would allow SimplyPrint to connect to the Markforged FX20, but we haven't built it.
What slicer should I use for the Markforged FX20?
The Markforged FX20 prints only from Markforged's own slicer, Eiger, so none of the slicers in SimplyPrint's cloud can slice for it.
What filament can the Markforged FX20 print?
Markforged lists Nylon (PA), Carbon-fiber & glass-filled and High-temperature (PEI, PEEK, PEKK) for the FX20. It prints only Markforged's own materials.
What is the Markforged FX20's bed size and build volume?
The Markforged FX20 has a 525 x 400 mm print bed and prints up to 400 mm tall, a build volume of about 525 x 400 x 400 mm. See the full specifications table above for bed type, temperatures and more.
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