Filtec FT-70c, Service And Technical Reference Manual

Page: 155 / 243

FT-70 Fill Level Inspector Service Manual
6-16
24. With the conveyor running very slowly so the reaction delay
does not effect the result, place a production container
upstream of the FT-70 so that it passes through the FT-70
without slipping. If the container appears to make contact on
the upstream third of the rejector pad, proceed to step 26.
Note:
The slat rejectors have a variation factor of
±
0.5 inch. If you are
using a slat rejector, average the accuracy over several rejects using
a single slat.
25. If the container is not rejected properly, make changes to the
measured distance or number of sprocket teeth as follows:
• Verify the Inspect Trigger to C/L Rejector distance is
measured and entered correctly (see steps 8 and 9).
• Verify the number of conveyor drive sprocket teeth is
entered correctly (see step 15).
The container position at reject can be in error by 0.5 inch for
every 12 inches of distance from the inspection trigger to the
rejector centerline (or slat assembly). For example:
• If the Inspection Trigger to Centerline Rejector distance is
24 inches and the container is 1 inch upstream of the
rejector when it fires, then the number of drive sprocket
teeth should be reduced by one.
• If the container is 1 inch down stream when the rejector
fires, the number of teeth should be increased by one.
26. Run the conveyor at the same speed as in step 16 and place a
can on the conveyor far enough upstream so that it does not
slip on the conveyor as it passes through the FT-70.
If the reject is late, check to be sure the encoder coupling is not
slipping. Try a rejection with a thin layer of grease on the pad.
If the resulting mark in the grease starts in the upstream third
of the pad face and is centered, then performance is acceptable.
If there are still significant early/late problems, and you are
certain that you have a standard conveyor chain, contact the
Industrial Dynamics Customer Service.
27. If you performed the previous step (step 26) at production
speed, then proceed to step 31. If you did not perform the
previous step (step 26) at production speed, then you must
repeat steps 12 thru 17 at production speed. When you finish,
return to step 26.
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