M codes
These are the default standard codes that are used in our normal virtual machines. Please note that customized machines may have other codes and formats.
M-code |
Explanation |
Format |
Example |
Machine type |
M00
|
Optional stop (pause). Will pause the execution of the CNC program if the “Op.Stop” switch on the virtual CNC Controller is activated. Click start or play to continue. |
M00 |
M00 |
All machines |
M01
|
Unconditional stop (pause). The execution of the CNC program will pause. Click start or play to continue. |
M01 |
M01 |
All machines |
M02
|
Program end. Simulation will stop. |
M02 |
M02 |
All machines |
M03
|
Start of spindle clockwise. The rotation speed is controlled by the S code letter. |
M03 |
M03 S2500 |
Milling and turning machines only |
M04
|
Start of spindle counterclockwise. The rotation speed is controlled by the S code letter. |
M04 |
M04 S2500 |
Milling and turning machines only |
M05
|
Spindle stop. |
M05 |
M05 |
Milling and turning machines only |
M06
|
Execute a tool change. The number of the tool has to be preselected with the T code letter. |
M06 |
T17 M06 |
Milling and turning machines only |
M08
|
Turn on coolant. |
M08 |
M08 |
Milling and turning machines only |
M09
|
Turn off coolant. |
M09 |
M09 |
Milling and turning machines only |
M17
|
Return from subroutine or subprogram. |
M17 |
M17 |
All machines |
M20
|
Open machine doors. |
M20 |
M20 |
All machines with doors |
M21
|
Close machine doors. |
M21 |
M21 |
All machines with doors |
M30
|
Program end. Simulation will stop. |
M30 |
M30 |
All machines |
M97 and M98
|
Call sub program. Use P for sub program number and L for the number of repetitions. |
M98 P# L# |
M98 P1000 L1 |
All machines |
M99
|
Return from a macro, subroutine or subprogram. |
M99 |
M99 |
All machines |
