Programming of CNC Machines, Third Edition

MISCELLANEOUS FUNCTIONS (M FUNCTIONS)

Miscellaneous function or "M-Codes," control the working components that activate and deactivate coolant flow, spindle rotation, the direction of the spindle rotation and similar activities.

CHART 2: MISCELLANEOUS FUNCTIONS, (M-CODES) FOR MACHINING CENTERS

Code

Function

M00

Program Stop

M01

Optional Stop

M02

Program End Without Rewind

M03

Spindle ON Clockwise (CW) Rotation

M04

Spindle ON Counterclockwise (CCW) Rotation

M05

Spindle OFF Rotation Stop

M06

Tool Change

M07

Mist Coolant ON

M08

Flood Coolant ON

M09

Coolant OFF

M10

Work Table Rotation Locked

M11

Work Table Rotation Unlocked

M13

Spindle ON Clockwise and Coolant ON, Dual Command

M14

Spindle ON Counterclockwise and Coolant ON, Dual Command

M16

Change of Heavy Tools

M19

Spindle Orientation

M21

Mirror Image in the Direction of the X Axis

M22

Mirror Image in the Direction of the Y Axis

M23

Cancellation of the Mirror Image

M30

Program End with Rewind

M98

Subprogram Call

M99

Return to Main Program from Subprogram

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