Modify height (calibration)
The height (often called Z max) of the printer is the value that defines the distance between the nozzle and the print bed when it is in its zero position (home).
The height is part of the calibration values of the machine and the right value is essential for good operation.
When the machine is turned on, in the monitoring screen it is possible to see among the values shown that of the height saved in the machine (indicated as Z).
As the height value changes, the following scenarios may occur:
To manually change the height value, each printer is equipped with a dedicated command within the PREPARE menu, depending on the version it can be called:
- Modify height;
- Modification Z max (Set Z max).
The procedure for changing the Z max depends on the machine and firmware version.
- Position the print bed and clean the nozzle;
- Send the printer to zero position (autohome);
- Use the command Prepare> Modify height (or Set Z max).
The screen allows you to choose a scale value at the top (between 10 mm, 1 mm, 0.1 mm) and consequently to go down by that value on the Z axis.
- With scale value 10, turn the control knob making the nozzle descend to about 20 mm from the printing surface;
- Click the knob once to select the scale value at 10mm;
- With scale value 1, rotate the control knob making the nozzle descend to about 2 mm from the printing surface;
- Click the knob once to select the scale value at 0.1 mm;
- With a scale value of 0.1, turn the control knob making the nozzle descend to about 1 mm from the printing surface;
- Click the knob twice to activate the “SAVE Z” item;
- Turn the knob to display “OK”;
- Click to confirm and save the new Z max;
- The machine will exit the command and will automatically go to the Home position.
If necessary, complete the calibration with the Prepare> Manual leveling command, adjusting the plane with uniform distance in all positions.