Fine-Tuning The Rejector Timing - Filtec FT-50c Service And Technical Reference Manual

Industrial Dynamics Company, Ltd. Document 40255-0600
16. Run the container 16 times (it is not necessary for the
containers to pass the rejector), through the FT-50 inspection
tunnel without slippage. When finished, the FT-50 automati-
cally completes the encoder calibration calculations, including
the Calibrate Encoder Value, Encoder Prescaler Value, Gamma
Sample Cutoff Limit, and Conveyor Drive Sprocket Teeth.
17. Close dip switch S1-6 and then stop the conveyor.
18. If you used a container other than a production container for
the calibration (or used the pipe method), press Key 5 until
CAN WIDTH AT TRIG appears and enter (in millimeters) the
production container's width at the trigger point (see steps 8
and 9).
19. Measure the distance in millimeters from the trigger sensor
beam to the centerline of the rejector. If you are using a slat
rejector measure from the beam to the upstream edge of the
slat assembly. Accurate measurement is extremely important
for proper calibration.
20. Press Key 4 until INSPECT TRIG TO C/L REJ appears and use
the Arrow Key to enter the measurement in millimeters.
21. Press Key 5 until CHAIN VELOCITY appears. Note this value
because you need to enter it in the following step.
22. Press Key 5 until MAXIMUM CONVEYOR SPEED appears
and enter the CHAIN VELOCITY value. The optimum encoder
value is now calculated including the Calibrate Encoder Value,
Encoder Prescaler Value, and Gamma Sample Cutoff Limit.

Fine-Tuning the Rejector Timing

To fine-tune the calibration accuracy you may need to adjust the
number of sprocket teeth estimated during the Calibrate Encoder
Routine. Experiment with a production container and observe the
rejector timing. Based on where the rejector pad contacts the
container, you must increase or decrease the number of teeth until
the can contacts the pad correctly.
23. To verify the calibration press Key 4 until REJECT NEXT
appears and then press the Arrow Key to enter the number of
containers you want to reject consecutively. Choose a number
such as 6 or higher to provide enough attempts to make adjust-
ments. When the number reaches zero, you must repeat this
step to reactivate the rejector.
Chapter 6: Calibration Procedures
6-15