One-line verdict

High-speed enclosed CoreXY for power users printing engineering filaments like ABS ASA nylon and carbon fiber, but early units require hardware fixes for reliability.

How it compares

vs Bambu Lab P2S ($550–$800): Plus4 wins on active chamber heating for ABS/ASA/nylon/CF, P2S wins on out-of-box reliability and AMS multi-color ecosystem
vs Bambu Lab X1 Carbon ($1100–$1400): Plus4 wins on price and active chamber temperature for engineering filaments, X1C wins on software maturity, LiDAR calibration, and print consistency
vs Creality K2 Combo ($550–$700): Plus4 wins on high-temp chamber control for engineering materials, K2 Combo wins on build volume and native multi-color support
vs Prusa MK4S ($750–$1100): Plus4 wins on print speed and active chamber heating, MK4S wins on reliability track record and open-source repairability

AI-summarized review themes

Frequently Praised

Exceptional print quality on PLA PETG ABS and carbon fiber composites
Fast 600mm/s speeds with smooth surfaces and minimal artifacts after tuning
Heated chamber up to 65C eliminates warping on high-temp materials
Fully automatic leveling and calibration minimizes setup tinkering
Large 305x305x280mm volume handles helmets and multi-part models easily

Frequently Criticized

Early SSR overheating risks fire hazards needing warranty replacement
Frequent Z-offset drift and bed leveling issues on high-temp prints
Hotend failures like heat breaks cracking after hundreds of hours
Occasional chamber heater and sensor malfunctions require support
Thick bed heats slowly extending preheat times significantly

Best for

engineering prototypes, functional carbon fiber parts, high-temp ABS ASA printing, serious hobbyist farms

Not for

absolute beginners avoiding tweaks, multi-color printing without add-on box, budget buyers seeking zero maintenance

Specifications

Spec	Value
Technology Type	FDM
Build Volume	305 × 305 × 280 mm
Max Print Speed	600 mm/s
Max Acceleration	20000 mm/s²
Max Nozzle Temp	370°C
Max Bed Temp	120°C
Max Chamber Temp	65°C
Auto-Calibration	Full-auto bed leveling Z-offset
Enclosed	Yes active chamber heater
Multi-Material	Compatible with QIDI Box
Linear Rails	Yes all axes
Firmware	Klipper-based

Data sources

Estimated ~500 purchase reviews via Reddit Trustpilot Facebook
Review period: 2024–2026
Sentiment confidence: medium

QIDI Plus4 3D Printer (Plus4)