Synchronisation
can mean many things in motion control. From coordinated movement
of two or more axes in position lock, to triggered motion
from an external event, to linking an axis to a reference
in applications such as flying shears, winders and conveyor
synchronisation. A common requirement is to synchronise motion
by triggering from an external event or position. In applications
such as the labelling machine illustrated, how the Motion
Coordinator handles synchronisation is critical to the performance
of the machine.
There
are 2 steps to the synchronisation process. Firstly the Motion
Coordinator is able to capture the position of an axis using
electronic hardware via 2 axis inputs. This capture process
can occur in around 1usec or less (dependant on controller
type). Secondly, although the Motion Coordinator works with
a fixed update cycle, (normally 250usec/500usec/1ms) and is
unable to take action until the next cyclic update. It can
be programmed to execute moves, or dwells, as if they started
exactly when the sensor was triggered.
Features
Hardware registration capture
2 independent capture registers available (on MC206X / PCI208)
Capture on falling/rising edge of registration inputs
Start move/dwell on position of link axis
Start move on registration event
Absolute or relative axis position shift at full speed
