
B–61404E/08
5. TEST OPERATIONOPERATION
451
To display the change in the position without moving the tool, use
machine lock.
There are two types of machine lock: all–axis machine lock, which stops
the movement along all axes, and Z–axis machine lock, which stops the
movement along Z–axis only. In addition, auxiliary function lock, which
disables M, S, and T commands, is available for checking a program
together with machine lock.
CRT/MDI
X
Y
Z
The tool does not move but the position
along each axis changes on the display.
Tool
Workpiece
Fig. 5.1 Machine lock
Procedure for Machine Lock and Auxiliary Function Lock
Press the machine lock switch on the operator’s panel. The tool does not
move but the position along each axis changes on the display as if the tool
were moving.
Some machines have a Z–axis machine lock switch. Refer to the
appropriate manual provided by the machine tool builder for machine
lock.
The position relationship between the workpiece coordinates and
machine coordinates may change after automatic operation by the
machine lock function has been executed. If this occurs, reset the
workpiece coordinate system by specifying the coordinate system setting
command or by making a manual reference position return.
Press the auxiliary function lock switch on the operator’s panel. M, S, and
T codes are disabled and not executed. Refer to the appropriate manual
provided by the machine tool builder for auxiliary function lock.
M, S, and T commands are executed in the machine lock state.
When a G27, G28, or G30 command is issued in the machine lock state,
the command is accepted but the tool does not move to the reference
position and the reference position return LED does not go on.
M00, M01, M02, M30, M98, M99, M198, and M199 and commands are
executed even in the auxiliary function lock state.
5.1
MACHINE LOCK AND
AUXILIARY
FUNCTION LOCK
D Machine Lock
D Auxiliary Function Lock
Explanations
D M, S, T command by only
machine lock
D Reference position
return under Machine
Lock
D M codes not locked by
auxiliary function lock