The X-Max 3 and X-Plus 3 are the enclosed CoreXY machines that established QIDI in the "affordable technical materials" niche. Both rely on a heated chamber, a 350 °C nozzle and serious mechanics — the X-Max 3 in large format, the X-Plus 3 in a more compact size.
These are QIDI's "X-3" machines. The Plus 4 came to modernize the X-Plus 3's segment (stronger chamber, 370 °C); the X-Max 3 remains the brand's large-format option.
In brief
Enclosed CoreXY, Klipper, 600 mm/s, 350 °C nozzle, ~120 °C bed, auto leveling. The X-Max 3 prints big (325 mm) with a heated chamber; the X-Plus 3 brings the formula to 280 mm. Budget ≈ $900 (X-Max 3) and ≈ $600 (X-Plus 3).
Variant table
| Spec | X-Max 3 | X-Plus 3 |
|---|---|---|
| Volume | 325 × 325 × 315 mm | 280 × 280 × 270 mm |
| Motion | Enclosed CoreXY | Enclosed CoreXY |
| Chamber | Heated (~65 °C) | Enclosed (lighter chamber) |
| Nozzle / speed | 350 °C · 600 mm/s | 350 °C · 600 mm/s |
| Materials | PLA, PETG, ABS, ASA, PC, PA, composites (with hardened nozzle) | |
| Firmware | Klipper · auto leveling | |
| Indicative price | ≈ $900 | ≈ $600 |
Strengths
- Large technical volume (X-Max 3): a 325 mm enclosed, heated cube, rare at this price.
- Heated chamber + 350 °C: ABS, ASA, PC and composites within reach.
- Fast CoreXY on Klipper: 600 mm/s, auto calibration.
- Robustness: machines built to run long jobs on demanding materials.
Limits
- Previous generation: the Plus 4 does better on chamber (active 65 °C) and nozzle (370 °C) at the mid format.
- Footprint (X-Max 3): large and heavy, plan the space.
- Ecosystem: less "slick" than Bambu (Klipper, software finish trails).
- No integrated multicolor as developed as an AMS.
Versus the Plus 4
If you're torn between the X-Plus 3 and the Plus 4 (similar sizes): the Plus 4 is newer, with a stronger active 65 °C chamber and a 370 °C nozzle — the better pocket "technical materials" pick. The X-Max 3 keeps one unique argument: large volume. Choose it when part size comes first.
Who's it for?
The X-Max 3 is for those who want to print big in technical materials (heated enclosed, 325 mm). The X-Plus 3 remains a good used/sale buy, but for new at the mid format, the Plus 4 is more relevant. For the affordable enclosed, see the Q2; for very high temperature, PEEK.
The X-Max 3 = QIDI's large-format technical machine; the X-Plus 3, a classic the Plus 4 has since surpassed at the mid format.