---
tag: m0808
title: Repeat Marker
brief: Set or go to a marker for looping G-code
author: thinkyhead

since: 2.0.8
requires: GCODE_REPEAT_MARKERS
group: none

codes: [ M808 ]

notes:
  - At this time repeat markers only apply during SD printing.

parameters:
  -
    tag: L
    optional: true
    description: Loop counter. Use `L` or `L0` for an infinite loop.
    values:
      -
        unit: count
        type: int

example:
  -
    pre: Say "Hello World" 5 times
    code:
      - M808 L5
      - M118 Hello World
      - M808

---

The Repeat Marker command is used to define regions of a G-code file that will be repeated during SD printing. A marker is first set with `M808 L[count]`, and later in the file a plain `M808` command is used count down and loop. (By default up to 10 start markers can be nested.)

In slicer software put `M808 L` to the "**Start G-code**" and `M808` to the "**End G-code**." But this command is not the only requirement. Before starting each whole object it's important to actually clear the print area of obstacles and to reset the coordinate system with `G92` or `G28`, so this command is best used with belt printers or other systems with automatic print removal.