
B--63003EN--1/02
1. AXIS CONTROL
105
When synchronous control is started for a workpiece coordinate system,
it is possible to specify the workpiece coordinate system automatically.
When synchronous control for a workpiece coordinate system is
terminated, it is possible to return the workpiece coordinate system to
ordinary machining (not synchronous control). The explanation of the
workpiece coordinate system used during synchronous control follows:
For example, when synchronous control is used to move an axis
differently from the way originally specified, the master axis may be
placed in a parking state, while the slave axis is allowed to move. In such
a case, it will be convenient if a coordinate system used to represent the
current position of the slave axis is used as a workpiece coordinate system
for the master axis. Conventionally, this workpiece coordinate system
must be specified by program when synchronous control is started,
because the workpiece coordinate system does not originally belong to
the master axis. This automatic workpiece coordinate system setting
function for synchronous control sets up this workpiece coordinate
system automatically. This function can also resume the original
workpiece coordinate system for the master axis automatically. This
function does not work for the slave axis.
In addition to setting ordinary synchronous control, parameters must be
specified as follows:
(1)To set up a workpiece coordinate system for synchronous control
automatically when starting synchronous control
Set parameter No. 8163 (SPMx) to “1”. (Master axis parameter
only)
Set parameter No. 8185 with the coordinates of the master axis
when both master and slave axes are at the reference position.
(2)To resume the ordinary workpiece coordinate system
automatically when synchronous control is terminated
Set parameter No. 8163 (SPSx) to “1”. (Master axis parameter
only)
Set parameter No. 1250 with the workpiece coordinates of the
master axis when the master axis is at the reference position.
This synchronous control can be specified using the G0138 signal
similarly to the ordinary synchronous control. When the signal is raised
to start synchronous control, the workpiece coordinate system for the
master axis is automatically set up. Likewise, when the signal is dropped
to terminate synchronous control, the original workpiece coordinate
system for the master axis is set automatically.
(1)Workpiece coordinate system for synchronous control
(Master axis workpiece coordinate value)
= (parameter No. 8185 for the master axis)
(slave axis machine coordinate value) . ¡
+ (master axis machine coordinate value) ©
¡ +:Master axis parameter SCDx = 0
−:Master axis parameter SCDx = 1
© Master axis parameter SCMx = 1 only
Automatic setting of
workpiece coordinate
system
D Explanation
D Setting and command
D Workpiece coordinate
value calculation method