Adlink PCI-8158 Manuel d'utilisateur télécharger pdf (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.

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Adlink PCI-8158 Manuel d'utilisateur Page 88