# Zcalibrate
This panel supports various modes of operation to assist in the calibration of the Z axis of the machine.
It's strongly suggested to read Klipper documentation about [Bed level](https://www.klipper3d.org/Bed_Level.html)

![Screenshot](img/panels/zcalibrate.png)


## Buttons
* "Start" will initiate the only method available, or ask the user if multiple methods are available.
* The raise(+) and lower(-) buttons send `TESTZ Z=distance` where distance is selected in the bottom row.
* Accept will send `ACCEPT`
* Abort will send `ABORT`

## Calibration methods
### Endstop (`Z_ENDSTOP_CALIBRATE`)
Available when an physical endstop is defined for `[stepper_z]`

See Klipper documentation: [Calibrating a Z endstop](https://www.klipper3d.org/Manual_Level.html#calibrating-a-z-endstop)

### Probe (`PROBE_CALIBRATE`)
Available when a probe is defined. (BL-Touch is a probe)

See Klipper documentation: [Calibrating probe Z offset](https://www.klipper3d.org/Probe_Calibrate.html#calibrating-probe-z-offset)

### Bed mesh (`BED_MESH_CALIBRATE`)
Available when a probe is not defined and `[bed_mesh]` is defined

this mode lets you create a mesh leveling bed using the paper test in various points.

!!! warning
    DO NOT adjust the bed screws while using this mode.

    Adjust the screws using the [bed screws](Screws.md) panel before running this tool.

### Delta Automatic/Manual (`DELTA_CALIBRATE`)
Available when the kinematics are defined as delta.

See Klipper documentation: [Delta calibration](https://www.klipper3d.org/Delta_Calibrate.html)

!!! note
    KlipperScreen will automatically Home(`G28`) if needed