Please help us by being a little more specific - Where do you find this command?
UI? API? mom? ISV?
take a look into the sim15 OOTB example. There we defined the M-Commands M120/121 M130/131 to open/close the chucks. If you need further information let me know.
Thank you, Thomas!
Working. My fault was - I set 4 parameter as "MAIN_SPINDLE", but must be "CHUCK", as real clamping device.
Thank you for idea!