Qidi is expanding its portfolio with the Max4, an FDM 3D printer with a large build volume and a focus on temperature-controlled processes. The manufacturer is positioning the device as a platform for large components and materials that benefit from a heated printing environment. The build volume is 390 x 390 x 340 millimeters.
The centerpiece is the third-generation actively heated chamber, which, according to the data sheet, reaches up to 65 degrees Celsius. Qidi combines it with controlled airflow and separate cooling at the extruder, which is achieved via an optional “Polar Cooler.” This is intended to significantly reduce the tendency to clog, with Qidi citing a 90 percent reduction. For PLA, the manufacturer also describes an interaction between chamber heating and active cooling, which is intended to reduce edge warping in large-area print jobs.
The hot end is specified for up to 370 degrees Celsius. Qidi specifies a bimetal nozzle made of hardened steel, with a standard diameter of 0.4 millimeters; other sizes are optional. The heating bed is specified for up to 120 degrees Celsius. Qidi refers to a full-surface silicone layer with a dense heating wire structure and insulation to keep the temperature more uniform over 390 by 390 millimeters and to build the first layer more stably.
For movement, the Max4 relies on CoreXY kinematics with 1.5GT belts. The technical data specifies a tool head speed of up to 800 millimeters per second and acceleration of up to 30,000 millimeters per second squared. The maximum volume flow is specified as 40 cubic millimeters per second. On the Z-axis, Qidi specifies 2-millimeter lead screws with two motors and an anti-backlash nut.
Automatic leveling uses a load cell sensor integrated into the hot end, with the nozzle acting as a sensor. For monitoring, Qidi uses an AI camera designed to detect typical printing errors such as “spaghetti,” as well as timelapse up to 1080p. A 3-in-1 filter consisting of a pre-filter, HEPA, and activated carbon is integrated. Connection is via Wi-Fi, Ethernet, or USB. Multi-color and multi-material printing is possible in combination with the Qidi Box, which also has a chamber heated to 65 degrees Celsius. Qidi lists TPU as supported, with a recommended hardness of 95A.
The price is around 1050 euros.
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