Light Barrier At Belt Re-Entry Zones - h/p/cosmos 150/50 mercury Operating And Service Manual

can also clean it with the help of a bristle brush soaked in alcohol, i.e carefulliy cleaning the optical elements in between
disc and light barrier.
Alternatively, a spray of fat-dissolving liquid (e.g. braking detergent) with a thin spraying canal may be used. The
pressure of the detergent cleans the optics of the light barrier.
When adjusting the light barrier, take care to adhere to
the following guidelines for the spaces between the glass
[3] and the casing [4] of the light barrier: Cleft [1] axial
approx. 1 mm/radial approx. 1 mm left and right
according to illustration above. The imaginary extension
of the light barrier should pass through the centre [2] of
the motor shaft.
Right hand side: The distance [1] between induction
sensors [2] and the cogwheel [3] must not be greater
than 0.8 mm.
8.12

Light barrier at belt re-entry zones

Some models (running surface 200/75cm and bigger) are equipped with light-barriers at the running belt re-entry zone
(rear position and front position for the reverse of belt rotation). As a safety measure, the light barriers effects a quick
stop when the light stream is interrupted by a hand, a falling towel, a coat and by dust on the glass and/or reflector of the
light barrier.
The light barrier must not be exposed to the flashof cameras. They might turn off the running belt
abruptly.
8.12.1.1 Cleaning of light barriers
To avoid unwanted switch off (quick stop), the light barrier and the reflector glass should be cleaned carefully with a
cloth moistened with alcohol at intervals of approximately one week, depending on the air and dust conditions in the
room.
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maintenance and safety inspections
created 04.05.2012 printed 04.05.2012 page: 111 of 191