AQS610-EU/SF (V2 H/W)
DOC 584 Issue A
TECHNICAL GUIDE
Page 5
2.3 Reject Blower
During the homing of the screw and the first in-screw of bottles at power up, the reject blower will activate to
reject any bottles which may have been left in the screw at previous power down, as these bottles will be of
unknown status.
IMPORTANT NOTE: - To achieve a reliable and repeatable reject sequence, the bottles are rejected from
the final screw position, whilst still on the deadplate, BEFORE they are allowed onto the conveyor as
the ‘drag’ at take-out cannot be relied upon to deliver each bottle at the exact same rate, hence the
reject timing becomes invalid.
1. The Reject Sequence is initiated as the screw starts to turn to bring the next set of bottles into the tester.
2. There is a settable delay ‘Reject Delay’ which elapses before the reject routine proper starts, to ensure that
bottle 1 has reached the reject blower position.
3. If bottle 1 test result is a fail the blower is turned on.
4. A delay ‘Reject On Time’ occurs, to ensure that the blower activates for long enough to remove a failed
bottle from the conveyor.
5. The reject blower is turned off ( if active ).
6. A delay ‘Reject Off Time’ occurs, to ensure that the leading edge of a good bottle following a failure is not
caught by the reject blow.
7. Steps 3 – 6 are repeated for all 6 leaktest positions.
NOTE : Because there is no method to differentiate between an Underfilled bottle, and an ‘empty’ test position,
the reject blower will still act for underfills, but they are NOT added to the failed bottle count.
