3D Printing InfoPrinter comparison
QIDI X-Max 3 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 X-Max 3 comparisonsMore Rat Rig V-Core 4 comparisons
| Property | QIDI X-Max 3COREXY | 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 X-Max 3, listed by QIDI as "Qidi Tech X-Max 3 3D Printer" and in navigation as X-Max3[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 by QIDI; the product page carries a discontinuation notice rather than a launch date (checked Aug 2026)[1] | Not documented |
| Street price (USD; dated snapshot per entry) | $899.00 (from a $999.00 sale reference) on us.qidi3d.com but marked Sold Out and discontinued, checked Aug 2026. 3D Printers Online Store lists $1,099 USD, also out of stock[1][4] | $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) | Same-generation siblings X-Plus 3 (280x280x270, 500 mm/s, 800 W) and X-Smart 3 (175x180x170, no chamber heating, 300 °C, 350 W). All three share the Cortex-A53 1.5 GHz / 1 GB DDR3 / 8 GB eMMC control board, so shared-board specs are not evidence of shared print specs. Replaced by the Max4[2][6][7][8] | 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 Superseded by the V-Core 4.1.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| Market position: superseded?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? | Discontinued and out of production; QIDI directs buyers to the Max4[1] | Superseded by the V-Core 4.1, which adds a steel X gantry, a full-metal toolhead, improved part cooling, 8 mm beds on the 400 and 500 sizes and pre-made cables.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 | 325 x 325 x 315 mm advertised[1][2][4] | 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) | 553 x 553 x 601 mm[2][4] | Not documented |
| Net weight (kg) | 30.2 kg net[2][4] | Not documented |
| Frame construction & material | Enclosed CoreXY chassis, fully assembled from the factory. QIDI does not publish a frame-material breakdown[2] | 30-series aluminium extrusion with printed ABS structural parts[3][5] |
| Enclosure: open / enclosed; panel material; door/lid | Fully enclosed, with a chamber circulation blower and activated-carbon air filter[2] | Open by default; enclosure panels sold separately[3] |
| Passive chamber temperature reached (if enclosed; measured values preferred) | 65 °C maximum, independent chamber heating (manufacturer claim)[1][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] |
| X-axis guide type (rods / linear rails / V-wheels; size) | Linear optical axis (polished steel rod) of high-strength steel[2] | Not documented |
| Z-axis: leadscrew count & type, sync mechanism, anti-backlash | Double Z axis[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) | <=600 mm/s (manufacturer claim)[1][2][4] | Not documented |
| Max acceleration (claimed, mm/s²) | 20,000 mm/s2 (manufacturer claim)[1] | Not documented |
| Max volumetric flow claimed (mm³/s) | 35 mm3/s extruder flow (manufacturer claim)[2] | Not documented |
| Extruder | ||
| Type (direct drive / bowden) & design name | High-flow direct-drive extruder; QIDI states a 9.5:1 gear ratio for this model[1][2] | LDO Orbiter 2.0 direct-drive extruder[3] |
| Gear ratio & drive gear material | 9.5:1[1] | Not documented |
| Hotend & Nozzle | ||
| Hotend design (proprietary/standard; quick-swap mechanism?) | Ceramic heating core. Two interchangeable nozzle-head sets shipped: copper alloy for standard materials, hardened steel for abrasives. 0.4 mm stock, 0.2/0.6/0.8 mm optional[1][2] | Phaetus Rapido 2.0 UHF[3] |
| Max nozzle temp claimed AND firmware max temp limit (both values) | <=350 °C claimed[1][2][4] | Not documented |
| Heated Bed & Surface | ||
| Max bed temp claimed AND firmware limit | <=120 °C claimed[2][4] | Not documented |
| Bed surface (material, texture, coating), single/double-sided | Double-sided flexible magnetic plate (QIDI's "HF" plate)[1][2] | Keenovo silicone bed heater[3] |
| Leveling & Z-Offset | ||
| Auto bed leveling: probe technology (inductive / strain gauge / load cell / touch probe) | Automatic levelling via Klipper adaptive meshing; probe technology not named by QIDI[1] | Beacon eddy-current probe[3] |
| Filament Handling & Detection | ||
| Filament runout sensor (type, location) | Filament detection fitted; type and location not published[2] | Not documented |
| Cooling & Air Handling | ||
| Part-cooling fan(s): count, size, ducting design | Not documented | Nidec 4028 part-cooling fan[3] |
| Auxiliary part-cooling fan? | Additional (auxiliary) cooling fan fitted[2] | Not documented |
| Chamber/exhaust fan & filtration (activated carbon / HEPA) | Chamber circulation blower with activated-carbon air filter[2] | Not documented |
| Electronics & Power | ||
| Mainboard model & MCU (exact chip markings if teardowns exist) | Not documented | BigTreeTech Octopus[3] |
| Host computer (SoC, RAM, storage) if firmware runs on embedded Linux | Cortex-A53 64-bit at 1.5 GHz, 1 GB DDR3, 8 GB eMMC[1][2] | Not documented |
| Input voltage (110/220 V, switch or auto) | 100-240 VAC, 50/60 Hz[2] | Not documented |
| Total rated power draw | 900 W rated[2][4] | Not documented |
| Firmware & Openness | ||
| Firmware base & current version (Klipper fork / Marlin fork / proprietary) | Klipper with the Fluidd web console. Fork and version not published[1] | RatOS, Rat Rig's Klipper distribution[5] |
| Connectivity, UI & Camera | ||
| Display: size, type, touch? | 5-inch touchscreen, 800 x 480[2] | Not documented |
| WiFi (band/standard), Ethernet, USB ports, SD/flash-drive | Wi-Fi (QIDI states 150M 2.4G), Ethernet, USB flash drive[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] |
| Materials Support | ||
| Officially supported filament list | ABS, PLA, PETG, TPU, nylon, carbon fibre, PC[4] | Not documented |
| Reliability, Support & Ecosystem | ||
| Warranty length & support reputation (evidence, not vibes) | 1-year coverage[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 X-Max 3 product page (US store) us.qidi3d.com · 2026-08 · vendor
- QIDI Tech X-Max 3 technical data table 3djake.com · 2026-08 · vendor
- RatRig V-Core 4 kit (US distributor listing) fabreeko.com · 2026-08 · vendor
- Qidi Tech X-Max 3 FDM 3D Printer listing 3dprintersonlinestore.com · 2026-08 · vendor
- Rat Rig V-Core 4.1 product page ratrig.com · 2026-08 · vendor
- QIDI Tech X-Plus 3 technical data table 3djake.com · 2026-08 · vendor
- QIDI Tech X-Smart 3 technical data table 3djake.com · 2026-08 · vendor
- QIDI Max4 product page (US store) us.qidi3d.com · 2026-08 · vendor