216
M CODES
96-8000
June 1999
M61-M64 Clear Optional User M
The M61 through M64 codes are optional for user interfaces. They will deactivate one of relays 25 through 28.
These are the same relays used for M21-M24. When Through the Spindle Coolant is enabled, M64 is disabled.
When the M-Code Relay Board is installed and the Parameter 209 bit (MCD RLY BRD) is set to 1, M21-M28
become available on a secondary board.
M75 Set G35 or G136 Reference Point
This code is used to set the reference point used for G35 and G136. It must be used after a motion which is
terminated with the skip function.
M76 Disable Displays
This code is used to disable the updating of the screen displays. It is not necessary for machine performance.
M77 Enable Displays
This code is used to enable the updating of the screen displays. It is only used when M76 has been used to
disable the displays.
M78 Alarm if Skip Signal Found
This code is used to generate an alarm if the previous skip function actually got the skip signal. This is usually
used when a skip signal is not expected and may indicate a probe crash. This code can be placed in a block
with the skip function or in any subsequent block. The skip functions are G31, G36, and G37.
M79 Alarm if Skip Signal Not Found
This code is used to generate an alarm if the previous skip function did not actually get the skip signal. This is
usually done when the absence of the skip signal means a positioning error of a probe. This code can be
placed in a block with the skip function or in any subsequent block. The skip functions are G31, G36, and G37.
M82 Tool Unclamp
This code is used to release the tool from the spindle. It is not normally needed as tool change operations do
this automatically and a manual TOOL RELEASE button is available to the operator. THIS M CODE IS NOT
RECOMMENDED FOR USE AS THE TOOL WILL BE DROPPED FROM THE SPINDLE AND MAY DAMAGE
THE TOOL, THE MACHINE, OR YOUR SETUP.
M86 Tool Clamp
This code will clamp a tool into the spindle. It is not normally needed as tool change operations do this auto-
matically and a manual TOOL RELEASE button is available to the operator.
M88 Thru Spindle Coolant ON
This code is used to turn on the Through the Spindle Coolant (TSC) option. When M88 is called, the spindle
will stop, then the TSC pump will turn on, and the spindle will restart.
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