Change height (set Z MAX)

“Height change” or “SET Z MAX” refers to the value that defines the distance between the printer nozzle and the print bed when the printer is in its zero (home) position. This height is a critical parameter in machine calibration and must be set correctly to ensure optimal operation.

Typically, the height value is set automatically during the printer’s self-calibration process. When you turn on the machine, you can see the height value saved in the printer’s memory on the monitoring screen, referred to as “Z”.

However, in some situations, you may need to manually change the height value. This might be useful in the following cases:

  • THE PRINTER DOES NOT HAVE AN AUTO-CALIBRATION SYSTEM: Some printers may not be equipped with an automatic self-calibration system, and therefore you must manually set the height value.
  • HEIGHT VALUE CORRECTION: In some circumstances, you may need to make slight adjustments to the height value to ensure proper adherence of the first print layer to the print bed.

When you manually change the height value, the following scenarios might occur:

  • HEIGHT INCREASE: If you increase the height value, the nozzle will lift further off the print bed. This could be useful to avoid collisions or to ensure sufficient space between the nozzle and the bed.
  • HEIGHT DECREASE: If you decrease the height value, the nozzle will lower closer to the print bed. This may be necessary to achieve a better adhesion of the first print layer.

To manually change the height value, each printer is equipped with a dedicated command that can usually be found in the “PREPARE” menu. The specific name of the command varies depending on the printer model or firmware version used.