General - Beckhoff TwinCAT 2 Manual

General

2 General
The Flying Saw is a slave axis that can be synchronized to a moving master axis. The slave axis moves in
synchronism with the master axis to perform machining processes. This kind of movement, synchronized to
the master axis, means that a workpiece can be machined even while it is being transported.
An important difference between the "Flying Saw" and the "Universal Flying Saw" is associated with the
initial conditions required of the slave axis for the synchronization. The "Universal Flying Saw", unlike the
"Flying Saw", is able to start synchronization of the slave even when the slave has already started, and is
therefore no longer stationary. The "Universal Flying Saw" also calculates improved set value profiles, and
these can be influenced by the user through a wide range of boundary conditions.
The ratio of the master velocity to the slave velocity in the synchronous phase is parameterized via a
variable coupling factor. This coupling factor in the case of a diagonal saw, for instance, is chosen to be
unequal to 1, so that the velocity component of the slave axis in the direction of the master axis movement
(v ) in the synchronized phase is equal to the master velocity (v
slave parallel to Vmaster
The Universal Flying Saw basically provides two different synchronization methods. In the case of
synchronization to velocity the slave is synchronized to the master as quickly as possible, bearing in mind
the coupling factor. The coupling position for the master and slave axes therefore results from having set the
fastest possible synchronization as the target. In contrast to this, the coupling position of the master and
slave axes is parameterized by the user under synchronization to position. The master and slave movements
will in this case therefore be moving in synchronization as from the specified position at the latest.
Both of these synchronization methods permit a variety of boundary conditions to be specified for the
synchronization phase. These boundary conditions make it possible to adapt the synchronization process to
the needs of the machine.
This manual describes the Universal Flying Saw TcMc2_FlyingSaw.lib, which is available from
TwinCAT Version 2.9, Build 248. If you are using the previous version TcNcFlyingSaw.lib and need
further information, see here.
Interfaces
The Universal Flying Saw is operated and monitored from the PLC using appropriate function blocks. For
commissioning purposes, however, the Universal Flying Saw can also be started directly from the TwinCAT
System Manager [} 32]. In this case, the cyclic NC/PLC axis interface and ADS communication are used as
the underlying interface.
8 Version: 1.3
). (See diagram.)
master
TS5055