Bed level
For this panel to appear in the menu [bed_screws]
or [screws_tilt_adjust]
need to be defined in Klipper config (printer.cfg)
Important
[bed_screws]
uses nozzle positions (nozzle above the screw) Read Klipper doc entry[screws_tilt_adjust]
uses probe positions (probe above the screw) Read Klipper doc entry
The corner buttons in KlipperScreen place the nozzle above the screw to do the "paper test".
When [screws_tilt_adjust]
is defined a couple of things happen:
- A button named "Screws adjust" appears, it runs
SCREWS_TILT_CALCULATE
when is pressed, and reports the amount to be adjusted into the labels of the corner buttons. [bed_screws]
is now ignored by KlipperScreen. (explained below)- The corner buttons are now
[screws_tilt_adjust]
coordinates with the probe offset applied. (explained below)
Why [bed_screws]
are ignored/not used?
[screws_tilt_adjust]
positions with offset will be used over [bed_screws]
, because if the probe offset is changed or
the difference between [bed_screws]
and [screws_tilt_adjust]
wasn't calculated correctly,
the "Screws adjust" button stops working correctly.
Why the probe offset is applied to [screws_tilt_adjust]
?
Because the corner buttons in KlipperScreen should place the nozzle above the screw to do the "paper test".
It doesn't affect the function of SCREWS_TILT_CALCULATE
, which will go to the defined positions.
Is BED_SCREWS_ADJUST
supported?
No, but you can achieve the same thing by using the corner buttons and going in a circle pattern adjusting until desired.
BED_SCREWS_ADJUST
is just a helper that moves to the screws in sequence
Limitations
The panel doesn't support more than 9 screws or grids bigger than 3x3.
Rotation
The layout can be rotated if the screen is not directly in front of the machine. in the printer configuration you would add screw_rotation: 90 Valid values are 0 90 180 270
Inversion
The layout will be inverted if an axis is inverted in the move panel
Is there an alternative?
If you have a reliable probe, define [bed_mesh]
in Klipper config, remove the springs
and use some thread-locker or locking nuts to fix the bed to the gantry, let the probe do a mesh save it and forget about this.