3D Printing InfoPrinter comparison
QIDI Max4 vs Rat Rig V-Core 4
Compare hardware, build volume, printing specifications, dated prices and sources.
2 selected · all documented properties
Open these two in the interactive comparisonMore QIDI Max4 comparisonsMore Rat Rig V-Core 4 comparisons
| Property | QIDI Max4COREXY | Rat Rig V-Core 4COREXY |
|---|---|---|
| Identity | ||
| Brand | QIDI | Rat Rig |
| Class | COREXY | COREXY |
| Identity & Market | ||
| Manufacturer & exact marketed model name (verify the exact product identity first) | QIDI Max4, sold as "Max4 High-Temp 3D Printer"[1][2] | Rat Rig V-Core 4, sold in the US as "RatRig V-Core 4 3D Printer Kit"[3] |
| Release date (announcement and actual shipping) | Not published on QIDI's product page; the machine is listed as the current replacement for the discontinued X-Max 3 (checked Aug 2026)[1][4] | Not documented |
| Street price (USD; dated snapshot per entry) | $1,099.00 standard on us.qidi3d.com against a $1,149.00 compare-at price, checked Aug 2026. Variants: Polar Cooler bundle $1,249.00 (was $1,348.00), Max4 Combo $1,249.00 (was $1,299.00), Combo + Polar Cooler $1,399.00[1] | $2,319.99 at Fabreeko for the fully-specified US kit (price includes shipping and duty in the continental USA), Batch 4, checked Aug 2026. 300 mm ABS-parts variant in stock, 400 mm down to one unit. Rat Rig's own base kit is priced separately in EUR[3][5] |
| Variants & sibling models — and how to tell them apart (spec-contamination risk) | Four variants at the US store: Standard, Polar Cooler bundle, Combo (adds QIDI Box), Combo + Polar Cooler. Direct replacement for the X-Max 3, which it differs from on every headline figure: 390x390x340 vs 325x325x315, 800 vs 600 mm/s, 370 vs 350 °C. Do not carry X-Max 3 specs across[1][4] | Three sizes (300, 400, 500 mm cubes) and three motion configurations: Standard CoreXY, Hybrid CoreXY (+$149.99, adds two motors to Y), and IDEX with two independent toolheads (+$450.00). Superseded by the V-Core 4.1. Raspberry Pi and enclosure panels are not included[3][5] |
| Market position: superseded? successor announced? | Current large-format flagship as of Aug 2026; QIDI's X-Max 3 page directs buyers here[1][4] | Superseded by the V-Core 4.1, which adds a steel X gantry, a full-metal toolhead, improved part cooling, 8 mm beds on the 400 and 500 sizes and pre-made cables. Rat Rig sells a 4.1 upgrade kit for existing V-Core 4 owners[5] |
| Physical & Frame | ||
| Build volume X×Y×Z (mm) — advertised vs actually usable | 390 x 390 x 340 mm advertised[1][2] | 300 x 300 x 300, 400 x 400 x 400 or 500 x 500 x 500 mm. Sortable value is the 300 mm kit[3][5] |
| Machine footprint (mm) & clearance needed (cable/spool overhang) | 558 x 578 x 612 mm[2] | Not documented |
| Net weight (kg) | 46.5 kg net[2] | Not documented |
| Frame construction & material | Enclosed CoreXY chassis; QIDI does not publish a frame-material breakdown[1] | 30-series aluminium extrusion with printed ABS structural parts[3][5] |
| Enclosure: open / enclosed; panel material; door/lid | Fully enclosed with a 3-in-1 air filter (G3 pre-filter + H12 HEPA + coconut-shell activated carbon)[2] | Open by default; enclosure panels sold separately[3] |
| Passive chamber temperature reached (if enclosed; measured values preferred) | 65 °C, independent active chamber heating (manufacturer claim), with a 4-pin PWM chamber fan with RPM feedback[2] | Not documented |
| Kinematics & Motion Hardware | ||
| Kinematics (bedslinger i3 / CoreXY / other) | CoreXY[2] | CoreXY, or Hybrid CoreXY, or Hybrid CoreXY IDEX depending on the configuration ordered[3] |
| Z-axis: leadscrew count & type, sync mechanism, anti-backlash | 2 mm lead Z screw with an anti-backlash nut[1] | Not documented |
| Stepper motors (frame size, step angle, brand if known) | FOC closed-loop stepper motors[2] | Not documented |
| Stepper drivers (exact model e.g. TMC2209; UART/SPI; sensorless homing?) | Not documented | TMC2209[3] |
| Speed & Acceleration | ||
| Max print speed (claimed, mm/s) | 800 mm/s (manufacturer claim, maximum)[2] | Not documented |
| Max acceleration (claimed, mm/s²) | 30,000 mm/s2 (manufacturer claim, maximum)[2] | Not documented |
| Max volumetric flow claimed (mm³/s) | 40 mm3/s rated flow (manufacturer claim)[2] | Not documented |
| Vibration Compensation / Input Shaping | ||
| Input shaping supported? Implementation (Klipper IS / Marlin ZV / proprietary) | Input shaper listed as a feature[2] | Not documented |
| Extruder | ||
| Type (direct drive / bowden) & design name | Direct drive, dual hardened-steel gears, 8.9:1 reduction[2] | LDO Orbiter 2.0 direct-drive extruder[3] |
| Gear ratio & drive gear material | 8.9:1; drive gears hardened steel[2] | Not documented |
| Hotend & Nozzle | ||
| Hotend design (proprietary/standard; quick-swap mechanism?) | Multi-metal hotend with a ceramic heater and a 0.4 mm bimetal nozzle; ceramic throat[2] | Phaetus Rapido 2.0 UHF[3] |
| Max nozzle temp claimed AND firmware max temp limit (both values) | <=370 °C claimed[1][2] | Not documented |
| Heated Bed & Surface | ||
| Max bed temp claimed AND firmware limit | <=120 °C claimed on a 390 x 390 mm bed QIDI markets as ultra-uniform (no thermal imaging published)[1][2] | Not documented |
| Bed surface (material, texture, coating), single/double-sided | Aluminium plate with silicone heater; double-sided magnetic PEI build plate[2] | Keenovo silicone bed heater[3] |
| Leveling & Z-Offset | ||
| Auto bed leveling: probe technology (inductive / strain gauge / load cell / touch probe) | Automatic levelling; probe technology not named by QIDI[2] | Beacon eddy-current probe[3] |
| Filament Handling & Detection | ||
| Filament runout sensor (type, location) | Filament run-out sensor and filament tangle detection (tangle mechanism not described), plus a filament cutter[2] | Not documented |
| Multi-material/multi-color capability or official upgrade path | QIDI Box multi-colour unit supported; sold bundled as the Max4 Combo[1][2] | Not documented |
| Cooling & Air Handling | ||
| Part-cooling fan(s): count, size, ducting design | Toolhead, model and auxiliary fans are all 4-pin PWM with RPM feedback; mainboard and chamber fans are closed-loop, chamber fan high-power turbo[2] | Nidec 4028 part-cooling fan[3] |
| Chamber/exhaust fan & filtration (activated carbon / HEPA) | 3-in-1 filtration: G3 pre-filter, H12 HEPA, coconut-shell activated carbon[2] | Not documented |
| Electronics & Power | ||
| Mainboard model & MCU (exact chip markings if teardowns exist) | Not documented | BigTreeTech Octopus[3] |
| Input voltage (110/220 V, switch or auto) | 110 V / 220-240 V AC, 50/60 Hz[2] | Not documented |
| Firmware & Openness | ||
| Firmware base & current version (Klipper fork / Marlin fork / proprietary) | Not stated on the product page; QIDI Studio, PrusaSlicer and Orca are the supported slicers[2] | RatOS, Rat Rig's Klipper distribution[5] |
| Connectivity, UI & Camera | ||
| Display: size, type, touch? | 5-inch touchscreen, 480 x 800[2] | Not documented |
| WiFi (band/standard), Ethernet, USB ports, SD/flash-drive | Wi-Fi, LAN, USB[2] | Not documented |
| Camera: built-in / optional? Resolution & framerate (verify — marketing often omits real fps) | AI camera with print-failure detection[1][2] | Not documented |
| Calibration Routines & QoL | ||
| Assembly level & time from unbox to first print | Not documented | Self-assembly kit; Raspberry Pi and enclosure panels sourced separately[3] |
| Power-Loss & Interruption Recovery | ||
| Power-loss recovery: mechanism (how is state saved? capacitor / eeprom / file on shutdown?) | Power-loss recovery listed; mechanism not published[2] | Not documented |
| Materials Support | ||
| Officially supported filament list | PLA, ABS, ASA, PETG, TPU, PA, PC, and glass- and carbon-fibre-filled polymers[2] | Not documented |
| Reliability, Support & Ecosystem | ||
| Warranty length & support reputation (evidence, not vibes) | 1-year coverage, lifetime tech guidance, 14-day no-reason return[1] | Not documented |
Manufacturer claims, independent measurements, packages and test conditions retain their source wording. FDM linear speed and resin vertical speed use different units and are not directly comparable. Unknown values are marked “Not documented”. Prices and source dates remain historical snapshots; check the linked guide for product details. Differences highlight text, not a universal winner.
Sources for this comparison
- QIDI Max4 product page (US store) us.qidi3d.com · 2026-08 · vendor
- QIDI Tech Max4 technical data table 3djake.com · 2026-08 · vendor
- RatRig V-Core 4 kit (US distributor listing) fabreeko.com · 2026-08 · vendor
- QIDI X-Max 3 product page (US store) us.qidi3d.com · 2026-08 · vendor
- Rat Rig V-Core 4.1 product page ratrig.com · 2026-08 · vendor