Spanish 
French 
German 
Simplified Chinese G21 – Set Machine Units To Millimetres
This command is used to set machine units to Millimetres. All gcode values after this command will be processed as Millimetres.
G21 is Modal and is a member of Group 6
Syntax & Parameters
- G21
Example program
N10 G21
The above gcode will set the machine units to Millimetres.
