Gocator Line Profile Sensors: User Manual
Gocator Web Interface • 91
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 measurement 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.
Measurement 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.
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