Service manual M695 | Description microscope M695 |
Doc code 636 718 | 03/93 |
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Recognizing end of range An encoder disk rotates with the zoom gear. The white field on the disk is marking the limit area. It is sensed by two light barriers located on the zoom servo.
If one of both light barriers senses the white field, through a gate the transistor bridge is blocked for that direction of displacement.
Before removing the encoder disk: Mark the disks position at its flange. The adjustment of the disk is described in section 11 - “Replacing boards” (Zoom servo).