The Ymir CrossXY 3D printer

The Ymir CrossXY 3D printer

Ymir (from Norse mythology, since I am a Viking) is a large-format 3D printer with a 650 × 650 × 700 mm build area. It can print huge parts, about 2 to 3 times larger than most 3D printers.

Status: in redesign. Ymir started out as a CoreXY printer and is now being redesigned around CrossXY kinematics. The design, printable parts and Bill of Materials will be shared freely and released on TinkerAtlas, so everyone who wants to can build one.

What is Ymir?

Ymir is MakerViking's large-format, open-source 3D printer with a 650 × 650 × 700 mm build area, about 2 to 3 times larger than most 3D printers. It started in 2020 as the Ymir CoreXY, crowdfunded by 23 backers, and is now being redesigned around CrossXY kinematics. The design uses MGN12 linear rails on XY and Z, 9 mm belts, an Orbiter 2.0 extruder, a 2040 aluminium-extrusion frame and 3-point automatic bed levelling with a TH3D EZABL Pro probe. The design, printable parts and BOM will be shared freely on TinkerAtlas.

Technical Specifications

Ymir has a 650 × 650 × 700 mm build volume, CrossXY kinematics (the original design was CoreXY), six MGN12 rails, an Orbiter 2.0 extruder and a Mellow FLY CDY V3 mainboard.

Specs might change during the redesign.

Key Features

Ymir's main features are its huge 650 × 650 × 700 mm build volume, CrossXY motion on MGN12 linear rails, and fast 3-point automatic bed levelling, with an infinity mirror, acrylic top and heated chamber planned.

Huge Build Volume

• Ymir's build area is 650 × 650 × 700 mm
• Prints 2–3× larger than most 3D printers

CrossXY Motion on Linear Rails

• Ymir is being redesigned from CoreXY to CrossXY kinematics
• MGN12 rails on every axis with 9 mm belts

Fast, Automatic Bed Levelling

• Ymir's bed levelling is automatic, probing 3 points
• TH3D EZABL Pro probe

Planned Extras

• Ymir's planned extras are an infinity mirror with NeoPixels
• Acrylic top
• Heated chamber and enclosed top, if possible

Design Story

Ymir is a community-funded project that began in 2020 as the Ymir CoreXY. To fund the parts, I started a GoFundMe, "Be a part of the creation of Ymir CoreXY 3DPrinter", and 23 amazing backers raised kr 13,409 of the kr 16,000 goal. The promise then is the promise now: the design, printable parts and BOM will be shared freely, and everyone who helped will be credited.

The original plan was at least 600 × 600 × 600 mm on a CoreXY motion system. It has since grown to 650 × 650 × 700 mm, and Ymir is now being redesigned around CrossXY kinematics.

BOM / Parts Summary

The main parts of Ymir are six MGN12 linear rails, 9 mm belts and pulleys, an Orbiter 2.0 extruder, a Mellow FLY CDY V3 mainboard, a 7″ screen, a TH3D EZABL Pro probe and 2040 aluminium extrusions. The full BOM will be published with the release on TinkerAtlas. Main parts:

• 6× MGN12 linear rails
• 9 mm belts and pulleys
• Orbiter 2.0 extruder
• Mellow FLY CDY V3 mainboard
• 7″ screen
• TH3D EZABL Pro probe
• 2040 aluminium extrusions
• Side, front and back panels

Ymir vs other large-format printers

Ymir is an open-source DIY large-format printer; the closest commercial options are kit printers such as the Modix BIG-60 and the Elegoo OrangeStorm Giga.

Sources: Ymir specs from this page; Modix: Modix tech specs, BIG-60 page, BIG-60 V4 brochure; OrangeStorm Giga: Elegoo US product page and MatterHackers listing (flying gantry, Klipper).

Latest update (October 2026)

Ymir's status as of October 2026 is in redesign: the 650 × 650 × 700 mm printer is being moved from its original CoreXY design to CrossXY kinematics, and the specs may still change. No files are published yet. The next step is to finish the redesign and release the design, printable parts and BOM freely on TinkerAtlas. This month I also added a gallery of renders and photos of the original CoreXY design (2020–2021) to this page.

About the designer

Ymir is designed by Thomas Haugen (MakerViking), a Norwegian maker and a Top 1% designer on Thangs. He also builds open-source maker software: his parametric CAD app SindriCAD won a third prize in Snapmaker's U1 Innovation Fund, Phase 1 in 2026. Ymir was crowdfunded in 2020 by 23 GoFundMe backers.

FAQ

What is the Ymir 3D printer? Ymir is a large-format, open-source 3D printer by MakerViking with a 650 × 650 × 700 mm build area, now being redesigned from CoreXY to CrossXY.

How big is Ymir's build volume? 650 × 650 × 700 mm, about 2 to 3 times larger than most 3D printers. The original plan was at least 600 × 600 × 600 mm.

Is Ymir CoreXY or CrossXY? Ymir started out as a CoreXY printer in 2020 and is now being redesigned around CrossXY kinematics.

Are the Ymir files available? Not yet. The design, printable parts and BOM will be shared freely and released on TinkerAtlas.

How was Ymir funded? Through a 2020 GoFundMe, where 23 backers raised kr 13,409 of the kr 16,000 goal. Everyone who helped will be credited.

Gallery

Ymir's gallery is a set of renders and photos of the original CoreXY design from 2020 and 2021, before the CrossXY redesign.

These images show the original CoreXY design of Ymir (2020–2021), before the CrossXY redesign.

Ymir render with redesigned door handles and internal spool holders (Jun 2021) – original CoreXY design (2020–2021)

Ymir render with redesigned door handles and internal spool holders (Jun 2021) – original CoreXY design (2020–2021)

Ymir render with redesigned door handles and internal spool holders (Jun 2021) – original CoreXY design (2020–2021)

Ymir CoreXY enclosure render (Jun 2021) – original CoreXY design (2020–2021)

Ymir render with finished CoreXY kinematics (Jun 2021) – original CoreXY design (2020–2021)

Ymir hotend assembly render with Mjolnir (Jul 2021) – original CoreXY design (2020–2021)

Ymir CoreXY design render (Apr 2021) – original CoreXY design (2020–2021)

Community-funded 2040/2020 V-slot extrusions for Ymir (May 2020) – original CoreXY design (2020–2021)

Downloads & Support

Ymir's files are not released yet; they will be published on TinkerAtlas, and you can support the project on Patreon.

• Files: not released yet; they will be published on TinkerAtlas
• Support the project: join my Patreon, where I post updates on Ymir, Fenrir and my other projects
• Original fundraiser: GoFundMe (2020)

Thank you to all my backers and Patrons, I appreciate you!

Ymir is funded by the 23 GoFundMe backers from 2020 and my Patrons.

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