5.2 Coarse Tuning of distance between the nozzle and the hotbed
*If the nozzle is far from the surface of hotbed, loosen the M3x50mm screw to extend the bottom
part.
Then the printer will home at a relatively lower place, the distance between the nozzle and the
hotbed will be decreased.
*If the nozzle is too close to the surface of hotbed, tighten the M3x50mm screw to shorten the
bottom part.
Then the printer will home at a relatively higher place, the distance between the nozzle and the
hotbed will be increased.