---
title: M20, M21, M22 (Torch height control / Plasma THC)
slug: m20-m21-m22-torch-height-control-plasma-thc
docTags: 
createdAt: 2023-04-18T13:18:59.000Z
---

`M20` - THC on
`M21` - THC off
`M22 Q...`  - THC setpoint voltage