# Hardware Acquisition Triggers

A Camera Device can be configured to perform an acquisition by being triggered by another hardware device, such as a photoelectric sensor (aka photo eye), via either the Event or Manual setting of the Task Mode. This in turn can be used to execute a Task.

Note:

If your camera is configured to use a hardware acquisition trigger, and you are experiencing extra acquisitions or missed triggers, determine if there is noise (i.e. the signal “bounces” or “rings”) on the I/O lines. If this is occurring, either adjust the MinTriggerWidth or MinTriggerPeriod settings of the camera, or configure the DebounceDuration of the Cognex Communication Card.

For more information on the MinTriggerWidth, MinTriggerPeriod and DebounceDuration settings, reference the following topics in the VisionPro Online Documentation:

- ICogAcqTriggerFilter.MinTriggerWidth Property
- ICogAcqTriggerFilter.MinTriggerPeriod Property
- CogPrio.DebounceDuration Property