Trigger Examples

Example: Encoder + Conveyor

Encoder triggering is used to perform profile measurements at a uniform spacing.

The speed of the conveyor can vary while the object is being measured; an encoder ensures that the trigger spacing is consistent, independent of conveyor speed.

Example: Time + Conveyor

Time triggering can be used instead of encoder triggering to perform profile measurements at a fixed frequency.

Spacing will be non-uniform if the speed of the conveyor varies while the object is being measured.

It is strongly recommended to use an encoder with transport-based systems due to the difficulty in maintaining constant transport velocity.

Example: External Input + Conveyor

External input triggering can be used to produce a snapshot for profile measurement.

For example, a photocell can be connected as an external input to generate a trigger pulse when a target object has moved into position.

An external input can also be used to gate the trigger signals when time or encoder triggering is used. For example, a photocell could generate a series of trigger pulses as long as there is a target in position.