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Flash cover sensors reading incorrectly or intermittently

Applies to
  • ThermoFlex

Description

The flash cover position is detected using reedswitch sensors for both open and closed positions. Faulty or intermittent operation of these sensors can result in failed load/unload sequences.

Causes

Solutions

Reedswitches / magnets faulty or misadjusted

Skewed flash cover

Due to the width of the flash cover, a pair of reedswitches must be activated to indicate the open position. One is positioned at the left side and a second at the right side. If the flash cover is badly skewed, only one of the switches may be active and a timeout or error condition could result. The same is true for sensing the closed position. Adjust the flash cover assembly to remove the skew.

Faulty electrical cable or connector

  • Check the wire harness and connectors for breaks.
  • Check the continuity of the cables. Repair or replace as necessary.

Damaged or misadjusted overtravel stops

The flash cover motion is limited by stop bumpers attached to the bearing block assembly. If the flash cover open detent position is difficult to find and/or the flashcover is difficult to lock, the bumpers may need to be adjusted.

  • Add or move M3 washers as required or replace damaged bumpers.

Damaged flashcover track assembly cover(s)

The open position of the flash cover is limited by stop bumpers coming into contact with the track assembly cover plate. If the cover plate becomes distorted, the flash cover may overtravel beyond the range of the sensors.

  • Replace damaged track assembly covers.

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