Geeetech A20T, User Manual, Page: 51 / 54

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SHENZHEN GETECH TECHNOLOGY CO., LTD
11 FAQ (Frequently Asked Questions)
11.1 Abnormal extrusion

The filament is tangled

The nozzle temp is too low to reach the melting temperature required.

There is carbonized residue inside the nozzle. Please replace it with the spare nozzle

Insufficient heat dissipation of radiator of the extruder head causes the filament in the
tube to melt in advance and the extrusion strength is insufficient. Please check whether
the cooling fan works normally.

The printing speed is so fast that the extruding speed can’t match it. Please reduce the
printing speed.
11.2 The gear of the extruder skips and makes an abnormal
noise

The nozzle is clogged; please refer to 11.1 abnormal extrusion.

Check whether the friction force between the extruder gear and the filament is enough.
Please clean the residue.

Check whether the voltage of the driver of the extruder is normal, and try to increase it
by 0.1v until it works normally, max 1.2v.
11.3 First layer abnormal

Non-stick: a. the nozzle is too far from the hot bed. Please re-level the bed, try to stick
masking paper or glue stick on the surface of the hot bed.

Not extruding and the bed scratched: a. the nozzle is too close from the hot bed. Please
re-level the bed; b. check if the nozzle extrusion normal.
11.4 Layer shift

The printing speed is too fast. Please slow it down.

The belt of X or Y axis is too lose. Please tighten it.

The X or Y axis synchronization wheel is not fixed firmly. Please adjust the eccentric nuts.

The voltage of the driver of X/Y axis is too low.