FT-70 Fill Level Inspector Service Manual
1-6
Rejection Control Basics
The FT-70 tracks any container that fails inspection. Tracking
begins the moment the container crosses the inspection trigger
beam in the FT-70 and ends when the container reaches the rejector
centerline.
Figure 1-3.
Tracking a reject container.
The FT-70 uses the conveyor speed, the distance between the
inspection trigger and the rejector, and the time it takes a container
to travel that distance at that speed to maintain container tracking
and rejector timing.
If your unit is equipped with a high-resolution encoder, coupled
directly to the conveyor drive sprocket, the encoder sends timing
pulses to the FT-70 and the FT-70 uses the pulses to determine the
containers position as it moves along the conveyor. When the
container reaches the rejector centerline the FT-70 emits a reject
signal which activates the rejector and removes the container from
the production line. Units equipped with the soft encoder operate
similarly, however the timing pulses are simulated by the software.
1
2
3
5
4
X
No. Description
1 FT-70
2 Inspection Trigger Location
3 Extent of Tracking Area (gray)
4 Rejector Centerline
5 Rejector
Industrial Dynamics Company, Ltd. © 40256-0600
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