Siemens SIMOVERT MASTERDRIVES Manual page 660

Technology Option F01
Displacement angle
setting [841]
Catch-up [837]
Applications for the
synchronization
function
9-12
An angle of displacement can now be conveniently set for
synchronization in the following 3 alternative ways:
♦ Setting an absolute displacement angle via a selectable connector
♦ Setting a relative displacement angle via connectors or parameters
which can either be supplemented in a positive or a negative
direction, depending on the current zero position.
♦ Setting a relative displacement angle in inching mode with a
selectable variable speed (similar to a motorized potentiometer).
These displacement angle settings can be made in any random size.
Overflows of more than one slave axis revolution can be coped with.
The displacement angle setting can be used, for example, to set up an
index control system for printing machines.
The catch-up function enables a drive to be uncoupled from an angular-
locked synchronizing multi-motor system (e.g. shaftless printing press)
and to be operated autonomously at its own speed setpoint ("isolated
setpoint"). It also enables a drive to halt at a specified angular position.
The drive can catch up to the speed of the running machine from the
halt position or from its current speed in autonomous operation. After
the catch-up command has been set, the drive accelerates to the
machine speed and can then be coupled back accurately into angular
synchronization after reaching speed synchronization.
The angular synchronization control system is a substitute for
mechanical shafts, gearboxes and cams, e.g. in
♦ Shaftless printing presses
♦ Packaging and bottling machines
♦ Shuttle looms and other textiles machinery
♦ Gantry systems
♦ Conveyor systems
6SE7087-6QX70 (Version AG)
Compendium Motion Control
05.2006
Siemens AG
SIMOVERT MASTERDRIVES