Too large clearance between table and nozzle This is the most common reason. You just need to set the correct gap between the table and the nozzle. Modern printers often use a table auto-calibration (auto-align) system or a table alignment utility. To calibrate such printers, use the instructions. If there is no instruction, you can download it on the manufacturer's website. If you have a simple printer without autocalibration, self-assembly or KIT kit, use a dipstick or a piece of paper folded in half to calibrate. The dipstick should be lightly pressed against the table by the nozzle. The table and extruder must be warmed up before calibrating. Align the surface of the table one by one over each adjustment screw (there can be 3 or 4) and only then check the center point.

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