# Useful Macros

### Bed mesh without Heater 

If you have problems with interference in your bed mesh scans, add this macro, it will turn off the heater while you're scanning. 

```gcode
[gcode_macro BED_MESH_CALIBRATE]
rename_existing: _BED_MESH_CALIBRATE
gcode:
    {% set TARGET_TEMP = printer.heater_bed.target %}
    M140 S0
    _BED_MESH_CALIBRATE {rawparams}
    M140 S{TARGET_TEMP}
```


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