M17/M18: User function ON/OFF
M21/M22: User function ON/OFF
M23/M24: User function ON/OFF
M27/M28: User function ON/OFF
These optional M-codesoptional M-codes allow multiple user functions to be CNC controlled. They can work with the M91 - M94 input M-functions to coordinate auto-loader activity.
Three-pole double throw relays in the spindle cabinet are controlled by these M-codes. You can wire to the relays for optional live tools or air blast or any other on/off device. The relays will handle up to 5amps at 220vac three phase.