A ".zip" file with this name often contains printer configuration files, firmware, or sliced models for specific machines.
[Question] How to install a firmware zip file · Issue #2014 - GitHub m109.zip
In cryptic posting, using G-code references can imply a "loading" or "paused" state, as the M109 command literally halts all other operations until a certain condition (heat) is met. 2. Military Technology (M109 Howitzer) m109.zip
In the world of 3D printing, is a standard G-code command used to set the hotend temperature and wait for it to be reached before continuing the print. m109.zip