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The QIDI Max4 is a large enclosed CoreXY printer with a 390 x 390 x 340 mm build volume, a 65 C actively heated chamber and a 370 C hotend. Its announced reference price was $1,149, with later official offers around $1,049.
This is workshop-scale equipment. The Max4 measures 558 x 578 x 612 mm and weighs approximately 40 kg before filament or the QIDI Box is added. It needs a large, rigid bench and careful planning for delivery.
A wide 390 mm build area
The 390 mm X and Y dimensions can accommodate large prototypes, molds, cosplay parts and batches of smaller components. Height is slightly lower at 340 mm, but the total volume is still 55 percent greater than the X-Max 3 according to QIDI.
Large beds amplify first-layer and thermal problems. QIDI uses independent Z motors, four 12 mm guides, fine-pitch lead screws and anti-backlash nuts to support the platform. The technical data sheet also lists a double-sided PEI build plate heated to 120 C.
Motion, flow and heat
Closed-loop X and Y motors use position feedback and FOC control, paired with a linear X rail and 10 mm belts. QIDI advertises movement up to 800 mm/s and acceleration up to 30,000 mm/s². These are peak figures, not the average speed of a large detailed print.
The hotend’s stated maximum flow is 40 mm³/s, measured by QIDI with its own ABS Rapido at 280 C. Flow changes significantly with filament and temperature, so this laboratory figure should not be transferred to every profile.
The actively heated chamber reaches 65 C, the bimetal nozzle 370 C and the bed 120 C. This thermal envelope is useful for ABS, ASA, PA and PC, particularly on parts wide enough to warp in a passive enclosure. Three-stage G3, HEPA H12 and activated-carbon filtration is included, but external ventilation remains advisable for technical polymers.
Specification sheet
| Specification | Announced value |
|---|---|
| Technology | Enclosed FDM CoreXY |
| Build volume | 390 x 390 x 340 mm |
| Machine dimensions | 558 x 578 x 612 mm |
| Net weight | About 40 kg |
| Maximum speed | Up to 800 mm/s |
| Maximum acceleration | 30,000 mm/s² |
| Maximum stated flow | 40 mm³/s under QIDI test conditions |
| Nozzle temperature | Up to 370 C |
| Chamber temperature | Up to 65 C, actively heated |
| Bed temperature | Up to 120 C |
| Filtration | G3, HEPA H12 and activated carbon |
| Multicolor | QIDI Box compatible |
Camera, software and multicolor
The onboard camera supports remote viewing and automated first-layer or filament-failure alerts. Detection can reduce wasted material, but should not replace first-layer checks on an object that may print for several days.
QIDI Studio prepares jobs, with Klipper and Fluidd providing the underlying machine controls. The filament cutter and QIDI Box support allow four-spool color printing, different support material or automatic spool continuation.
AppleInsider’s later review found the Max4 capable and attractive as a large multicolor printer, while also noting the practical learning and calibration demands of a machine this size. That independent experience is more useful than judging it by an 800 mm/s headline alone.
Is the Max4 a practical large-format printer?
The Max4 offers a serious combination of volume and chamber heat for prototypes and technical materials. Its closed-loop motion, reinforced Z system and high-flow hotend address real large-format requirements.
The trade-offs are space, weight, filament consumption and the time required to validate profiles across such a wide bed. It makes sense for an active workshop with recurring large projects; occasional users may get better value from splitting models across a smaller machine.
