Tag: hardware

The printer's mechanics: axes, motors and hardware-rooted errors. The single post here works through the Z axis 0300 4000 homing failure step by step.

24 Sep 2026  •  7 mins read

3D printer z banding, ringing or rough walls

Z banding, ringing and rough walls are three different marks. How to tell them apart, what sits behind each one, and what is still unsolved.

17 Sep 2026  •  5 mins read

Turn off the Bambu P1S light after a print

There is no known G-code for the Bambu main light. Leave it off before you print and the printer switches it on and back off by itself.

31 Aug 2026  •  3 mins read

Homing Z axis failed 0300 4000: Bambu Lab fix

The bed climbs halfway, stops, and the screen reads 0300 4000. Four things to check in order, from debris on the rods to belt tension.