The V-Core 4.1 is Rat Rig's open CoreXY kit, sold in 300, 400 and 500 mm sizes, with Hybrid and IDEX upgrades and optional carbon filtration. It is for experienced makers who want a Klipper printer they build and tune themselves.
Choose the V-Core 4.1 if you enjoy building and customising your printer and want it to grow: Rat Rig's page offers a size choice, electronics included or not, a Hybrid upgrade with higher acceleration and an IDEX upgrade for two materials or copy and mirror modes. Enclosing panels are not included (Rat Rig supplies DXF files), so it is not ready for ABS or classrooms as bought. We found no independent review for this version. If you want a printer that arrives ready to run, the Prusa CORE One+ is the easier route.
优点
Sold in 300, 400 and 500 mm sizes, so you pick the build volume (Rat Rig).
Hybrid and IDEX upgrades add higher acceleration or a second extruder for two materials or copy and mirror modes (Rat Rig).
An optional Rat Pack carbon filter for ABS, ASA, PC and nylon fumes (Rat Rig).
Open design with a plug-and-play wiring harness in the electronics kit (Rat Rig).
Works with SimplyPrint through Klipper.
缺点
A kit you assemble yourself, with the enclosing panels not included (Rat Rig).
Not an out-of-the-box printer: tuning and Klipper configuration are up to you.
Some parts are on backorder or pre-order, and the final cost depends on size, electronics and upgrades (Rat Rig).
We found no independent review of the 4.1.
适合谁
学校不太适合
An open kit that students would have to build and tune; the open frame leaves moving parts exposed.
业余爱好者非常适合
A flexible Klipper platform for tinkerers who like building and upgrading.
企业可用
Capable and configurable, but variable by build and not supplied ready to run.
打印农场不太适合
Every unit is a custom build to assemble and tune, so a fleet would be uneven and slow to deploy.
Rat Rig is a Portuguese company near Faro that designs and sells do-it-yourself kits for large CoreXY 3D printers and CNC machines, mostly to buyers abroad. Its V-Core printers come as kits you assemble, run on RatOS, Rat Rig's Klipper distribution, and suit makers who want a big machine they can upgrade and repair themselves.
成立:
2014 ·
总部:
Near Faro, Portugal ·
所有权:
Privately held; founder and CEO Miguel Carvalho (2024) ·
人员:
About 30 employees (2024) ·
网站:ratrig.com
Published designs, a GPL Klipper distribution, standard parts and no cloud leave the owner in control. The one limit is that the design files may not be reused commercially.
固件和自定义固件 ●●●●●
RatOS, Rat Rig's Klipper distribution, is developed in the open on GitHub under the GPL-3.0 and was still being updated in 2026 (2.1 release line); plain Klipper and Mainsail can be used instead.
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本地控制与集成 ●●●●●
RatOS runs Klipper, Moonraker, Mainsail and KlipperScreen on a Raspberry Pi in the printer, on your own network, and Moonraker's API is documented. Rat Rig has no printer cloud or account.
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第三方耗材、切片软件和零件 ●●●●●
The machines use standard parts (MGN and HG rails, Gates belts, LDO and BigTreeTech electronics, Orbiter extruders) that Rat Rig and others sell, any filament, and any slicer; OrcaSlicer ships V-Core 3, V-Core 4 and V-Minion profiles.
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维修和备件 ●●●●●
Rat Rig sells parts one by one and publishes CAD, STL files, bills of materials and step-by-step build guides on its wiki. The design files are licensed CC BY-NC-SA 4.0, so they are free to use and modify but not for commercial reuse.
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数据与隐私 ●●●●●
Printing needs no account and everything runs on the printer's Raspberry Pi; RatOS's setup script even turns off the telemetry of the web framework its configurator uses. Rat Rig's privacy policy covers only its web shop.
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社区和文档 ●●●●●
Rat Rig says its user communities (Facebook groups, plus an unofficial Discord) have many thousands of active members; documentation is public on its wiki and the RatOS site, and RatOS is developed openly on GitHub (by Mikkel Schmidt, per the RatOS docs). The documentation is split across the two sites.
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优点
Large build volumes, up to 500 mm, at kit prices.
Open, documented designs and standard parts make repairs and upgrades straightforward.
RatOS gives a ready-made Klipper setup that runs entirely on your own network.
Sold as kits: you assemble, wire and tune the printer yourself.
Design files are licensed for non-commercial use only (CC BY-NC-SA), unlike GPL projects.
Documentation is split between the Rat Rig wiki and the RatOS site.
实绩
2026: Rat Rig began selling the V-Core 4.1, a revised kit with a steel X gantry and newly written build documentation, together with a 4.1 upgrade kit for V-Core 4 owners.
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十一月 2024: 3D Printing Industry shortlisted the V-Core 4 (IDEX and Hybrid), released earlier in 2024, for Desktop FFF 3D Printer of the Year.
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九月 2024: Dinheiro Vivo reported that Rat Rig had received about 200,000 euros of regional development aid for its first expansion and had been granted about 100,000 euros more from the Algarve 2030 programme for trade fairs and equipment.
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2024年8月30日: Rat Rig released the IDEX upgrade that adds a second toolhead to the V-Core 4; it told Dinheiro Vivo it sold hundreds in the first 24 hours.
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十二月 2022: Rat Rig won the 3D Printing Industry Award for Company of the Year (Personal).
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2021: Rat Rig released the V-Core 3, a high-speed CoreXY kit in 200 to 500 mm sizes, with its design files on GitHub.
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葡萄牙
Klipper（Moonraker） 
PrusaSlicer
OrcaSlicer
BambuStudio
ElegooSlicer
CrealityPrint
Cura
Kiri:Moto
