ADLINK PCI-8158 - Manual (Page 88)

78 Operation Theory
4.6.4 Trigger comparator
The trigger comparator is much like general comparator. It has an
additional function, generating a trigger pulse when condition is
met. Once the condition is met, the CMP pin on the connector will
output a pulse for specific purpose like triggering a camera to
catch picture. Not all of axes have this function. It depends on the
existence of CMP pin of the axis. The following diagram shows the
application of triggering.
In this application, the table is controlled by the motion command,
and the CCD Camera is controlled by CMP pin. When the compar-
ing position is reached, the pulse will be outputted and the image
is captured. This is an on-the-fly image capture. If you want to get
more images during the motion path, try to set a new comparing
point right after previous image is captured. Continuous image
capturing can be accomplished by this method.
4.7 Other Motion Functions
We provide many other functions on the motion controller. Such as
backlash compensation, slip correction, vibration restriction,
speed profile calculation and so on. The following sections will
describe these functions.