# What is the M420 command used for?

**URL:** <https://3dprintingspace.com/t/what-is-the-m420-command-used-for/4501>\
**Category:** General Discussion\
**Created:** [August 16, 2022, 1:03pm UTC](https://3dprintingspace.com/t/what-is-the-m420-command-used-for/4501 "2022-08-16T13:03:57Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![Jason](https://3dps-assets.b-cdn.net/user_avatar/3dprintingspace.com/jason/32/6148_2.png) [@Jason](https://3dprintingspace.com/u/Jason)\
**Post date:** [August 16, 2022, 1:03pm UTC](https://3dprintingspace.com/t/what-is-the-m420-command-used-for/4501/1 "2022-08-16T13:03:58Z")

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In Case you were wondering if you should use G29 or M420, Here is a video, Here is a video I found that may help explain

[![](https://storage.3dprintingspace.com/original/2X/c/c4b91bb7bfd22bddf420e2e9f618ade7800927e4.jpeg "GCODE Tutorials Ep.2 : M420 - How to make your bed levelling work properly, and what M420 does.") ](https://www.youtube.com/watch?v=ra07eaJeL2w)