Geeetech A20T, User Manual, Page: 16 / 54

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SHENZHEN GETECH TECHNOLOGY CO., LTD
(Picture 6-3)
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Accurate leveling
If you level the bed with A4 paper, the first layer maybe too high, too low or moderate.
a. Too high: the distance between the nozzle and bed is too far, which may cause the filament to
not stick or not stick well. See picture (6-4).
(Picture 6-4)
b. Too low: the distance between the nozzle and the bed is too close, which prevents the filament
from coming out and causes the extruder gear to click, and even worse, scratch the nozzle on the
bed. See picture (6-5).
(Picture 6-5)
c. Moderate: Extrude the filament properly and evenly stick on the bed. See picture (6-6).
(Picture 6-6)
In the case of too low and too high, adjust the knobs under the platform till they are moderate. It
may take some trial and error to achieve the best result. An example of good first layer, see
picture (6-7).