Qidi X-Max 3 and Max 4: The Large Heated-Chamber Qidis
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The X-Max 3 is a 325 × 325 × 315 mm enclosed CoreXY with a 65 °C chamber and 350 °C hotend; the Max 4 replaces it at 390 × 390 × 340 mm with the same chamber class and the Qidi Box multi-colour option. Both are for large nylon, PC and fibre-blend parts. Buy the Max 4 new; the X-Max 3 only discounted. The Creality K2 Plus is the direct rival.
Where to buy
Side by side
| Spec | X-Max 3 | Max 4 |
|---|---|---|
| Build volume | 325 × 325 × 315 mm | 390 × 390 × 340 mm |
| Chamber | 65 °C active | 65 °C active |
| Max nozzle temperature | 350 °C | See listing (Qidi high-temperature hotend) |
| Max bed temperature | 120 °C | See listing |
| Speed / acceleration | 600 mm/s / 20000 mm/s² | See listing |
| Multi-material | No | Qidi Box (Combo) |
| Camera | Yes | Yes |
| Status | Superseded | Current |
What the size buys
At 390 mm the Max 4 is the largest heated-chamber printer near its price. That matters for engineering filaments specifically: a 350 mm ASA enclosure or a 300 mm nylon bracket prints without warping or cracking only inside a warm chamber, and open 400 mm printers cannot do it at all.
Against the K2 Plus
The Creality K2 Plus is 350 mm cubed with a 60 °C chamber, 350 °C hotend and native 16-colour CFS, with a much larger community. The Max 4 is bigger and reaches the same chamber class; Qidi’s software and spares are thinner. Buyers who want multi-colour at scale lean K2 Plus; buyers who want the biggest heated volume lean Max 4. See the K2 Plus page.
Practicalities
- A 390 mm heated bed plus chamber heater is a serious power draw; use a dedicated circuit.
- Warm-up to 65 °C takes time; batch your engineering prints.
- PLA needs the door open. See the Qidi lineup for smaller models if PLA is most of your printing.
The units in the box
The listings are the Max 4 Combo, the Plus 4 for the mid-size option and the Creality K2 Plus Combo as the rival.
FAQ
Can the X-Max 3 take the Qidi Box? Check Qidi’s compatibility list; it was designed for the 4-series.
Is the Max 4 faster than the X-Max 3? Similar class; size and flow set real speeds.
LayerWalker
Print defect diagnosis, calibration procedures and parts that actually fit. Corrections welcome through the contact page.
