
1.AXIS CONTROL B-63783EN-1/01
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1.10 TWIN-TABLE CONTROL
General
In twin-table control, synchronization operation, single operation, and
normal operation can be switched for two or more specified axes by a
signal input from the machine side.
In synchronization operation, an axis for which a move command can
be issued is called the master axis, and an axis for which movement is
performed in synchronization with that for the master axis is called a
slave axis.
The following operations can be performed for a machine tool having
two tables, each of which is independently driven by a separate
controlled axis.
- Synchronization operation
Use this operation for situations such as when a large workpiece placed
over the two tables is machined.
According to a move command issued to one axis, the other axis can be
operated in synchronization.
In synchronization operation, a move command for the master axis is
given to the two servo motors of the master axis and a slave axis.
Synchronous error compensation is not performed, in which a
deviation between the two servo motors is always detected and the
servo motor of the slave axis is subject to compensation such that the
deviation becomes small. Any synchronous errors are not detected,
either.
Synchronization operation is possible with automatic operation, jog
feed, manual handle feed, and incremental feed. Synchronization
operation cannot be applied to manual reference position return.
- Single operation
Use this operation for cases in which a small workpiece is machined on
either table.
With the use of a move command for the master axis, movement for the
master axis alone or for the slave axis alone can be performed.
A single operation can be applied to automatic operation. To operate
the machine manually, use a synchronization operation or normal
operation.
- Normal operation
Use this operation for cases in which different workpieces are
machined on the tables. In the same way as in normal CNC control,
specify respective axis addresses for movement for the master axis and
for the slave axis. Move commands for the master axis and the slave
axis can be specified in the same block.
Automatic operation and manual operation are performed in the same
way as in normal CNC control.