The T22 Pro is a printer that will offer users a lot of room to grow into as they begin to take advantage of some of the unique features of the machine. Who could benefit from using this printer? 2mm profile, and I was satisfied with the finished parts. The T22 Pro printed quickly and quietly using my. The hot end has a silicone sock attached over the heat block which keeps the temperature at a consistent level while printing. The TMC2208 silent stepper drivers allow the T22 Pro to print the high-pitched noise typically associated with stepper motors, and the only really noticeable noise coming from the machine comes from the hot end cooling fan, which tends to fade into the background when printing. (Photo: Andrew Sink) TMC2208 Silent Stepper Drivers Touchscreen and 3D Printed Mandalorian by iczfirz The T22 Pro ships with two versions of Cura on the micro SD card, but I typically just create my own profiles to avoid any issues with the included. I printed the Mandalorian model by iczfirz from MyMiniFactory to test out the printer using a custom PrusaSlicer profile I created for the machine. I had some issues with the test print Gcode files that shipped on the micro SD card that came with the machine, so I decided to try my own prints to test out the machine. (Photo: Andrew Sink) T22 Pro Print Quality The Z Endstop uses an optical sensor on a custom board I’m not sure it would be possible to entirely remove this leftover material, and it does seem to be the only major drawback to this style of leveling. I modified the start gcode and added a retraction move after the heating but before the leveling, which helped reduce the amount of material left on the bed. I noticed that during the test print, the nozzle and heated bed would reach temperature before running the leveling process, which left small spikes of material where the nozzle touched the bed. The yellow LED indicates the leveling system is currently active During this homing, a yellow LED underneath the bed lights up to indicate that the printer is actively taking measurements from the bed sensors, and the touchscreen flashes a reminder not to put any force on the bed while measurements are being taken. During the bed leveling, the printer first brings the nozzle to the center of the build platform and touches the bed which sets the Z offset for the machine. The T22 Pro uses an automatic bed leveling process that can be activated through the touch screen interface before a print, or called using a G29 command in the start Gcode before a print. This can be useful when printing with higher temperature materials where you may want a wider bead of filament for the first layer. For calibration during the print, the printer does allow live-z adjustments to be made to increase or decrease the nozzle distance from the print bed. As a result, the four knobs typically found at the corners of the print bed on similar machines are notably absent from the T22 Pro, replaced with the strain gauge sensors. This style of bed leveling means that the T22 Pro should not require any manual adjustments during the printing process. This configuration allows the printer to detect when there is any force being applied to the bed at a specific point, which is stored as a location offset. There are four strain gauge sensors, each located at a corner of the bed and used as an integral part of the bed mounting hardware. Unlike an induction sensor that uses proximity to the print surface to detect, measure, and store calibration values, the T22 Pro uses a strain gauge load cell located underneath the print surface to detect when the nozzle makes contact with the bed during the leveling process. The automatic bed leveling system on the T22 Pro uses a simple solution to solve the complex problem of compensating for an uneven print surface. (Photo: Andrew Sink) Strain Gauge Auto Leveling System The Meanwell Power Supply (right) and Speaker (left) After booting up the printer for the first time, I was surprised to discover it is a speaker which plays a melody when the printer is turned on and also whenever the touchscreen is touched. One of the unique surprises that this machine is hiding is the small black box under the frame which connects to the touch screen, and nothing else. The Titan-clone extruder is able to print quickly with minimal retraction required and the Meanwell PSU is able to get the bed and hot end up to temperature quickly. Assembly and installation is a straight-forward process that involves connecting the Z frame to the base of the machine and making a few electrical connections. The T22 Pro is a 3D printer with just enough unique features to make it stand out from other similar machines. TMC2208 Silent Stepper Motors Direct Drive Titan Clone Extruder Materials: 1.75mm Filament ( PLA, TPU, etc.)
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