QIDI Max4 3D Printer, 390x390x340mm, Heated Chamber, 800mm/s, CoreXY & Auto Bed Leveling Review (2026)

Who the Max4 is built for

The QIDI Max4 targets makers and small workshops who need both a large build volume and the ability to print engineering-grade materials like nylon, carbon-fiber composites, ASA and polycarbonate. Its 390x390x340mm chamber is unusually large for an enclosed, actively heated CoreXY printer, giving room for bigger functional parts, enclosures or batch jobs that would not fit on a standard 220x220mm bed. This is not a printer for someone who just wants a small first machine for keychains and school projects; the size, price and heated chamber are aimed at users who already know they need the extra volume and material range. A workshop, print farm operator or serious hobbyist printing structural or high-temperature parts is the clearer fit.

CoreXY motion, heated chamber and materials explained

QIDI rates the Max4's toolhead at up to 800mm/s with a maximum acceleration of 30,000mm per second squared, figures backed by FOC closed-loop stepper motors on the X and Y axes for more stable, accurate motion than open-loop steppers under fast direction changes. The chamber is actively heated and maintained at 65C, which matters for printing ASA, ABS and other materials prone to warping or delaminating in a cold, open environment. The bimetal nozzle reaches 370C with the bed capable of 120C, headroom that supports nylon and carbon-fiber filled filaments requiring higher processing temperatures than standard PLA or PETG. Auto bed leveling removes manual calibration despite the printer's much larger bed area.

Living with a large, enclosed CoreXY printer

A printer this size needs a dedicated spot with real clearance on all sides, since the enclosure and heated chamber add bulk beyond the stated build volume, and good airflow in the room helps manage heat and any fumes from engineering filaments like ABS or ASA. Setup and calibration follow typical CoreXY practice, checking belt tension and running the auto leveling routine, but the payoff is consistent large-format prints without the warping issues an open-frame printer would show with the same materials. Day to day, the heated chamber and high-temperature nozzle mean longer warm-up times before a print starts compared with a small open-frame FDM printer, and material costs rise with nylon and carbon-fiber filaments that this printer is built to handle well.

How it compares with other CoreXY printers

Against the Sovol SV08 MAX, an open-source Voron-based CoreXY printer with a similarly large build, the Max4 offers a more finished, enclosed experience with a heated chamber built in rather than added as a mod. Compared with Bambu Lab's P1S and P1P, both smaller enclosed CoreXY printers, the Max4 trades some of Bambu's ecosystem polish and multi-material AMS support for a considerably larger build volume and higher-temperature capability suited to engineering materials. The Flashforge Adventurer 5M Pro sits in the same enclosed CoreXY category but again with a smaller print area, making the Max4 the clear choice among these rivals specifically when bed size and chamber temperature range are the priority.

Verdict

The QIDI Max4 earns our score of 9.2 out of 10, the top mark in its CoreXY comparison set, for combining genuine size with genuine speed and material range rather than compromising on one to achieve the other. It suits workshops and serious hobbyists who need to print large or high-temperature engineering parts reliably. Buyers who do not need the extra chamber volume or the higher nozzle temperature range may find better value in the smaller Bambu Lab P1S or P1P, both of which cost less and take up less bench space. Anyone tight on room should measure clearance carefully before committing to a printer this large.

Frequently asked questions