IDEC SG4 Type 4 Finger & Hand - Manual (Page 25)

Instruction Manual SG4-B Series
21
The operator must respect the following precautions when using the
deviating mirrors:
 The alignment of the emitter and the receiver can be a very critical
operation when deviating mirrors are used. Even very small
displacements of the mirror is enough to lose alignment. The use of
Datasensor laser pointer accessory is recommended under these
conditions.
 The minimum safety distance (S) must be respected for each single
section of the beams.
 The effective operating range decreases by about 15% by using
only one deviating mirror, the percentage further decreases by
using 2 or more mirrors (for more details refer to the technical
specifications of the mirrors used).
The following table shows the operating distances relating to the
number of mirrors used.
Number
of mirrors
Operating distance
(14 mm)
Operating distance
(30 mm)
1 5.1 m 16.5 m
2 4.3 m 13.7 m
3 3.7 m 11.6 m
 Do not use more than three mirrors for each device.
 The presence of dust or dirt on the reflecting surface of the mirror
causes a drastic reduction in the range.
2.2.6. Controls after first installation
The control operations to carry-out after the first installation and
before machine start-up are listed hereinafter. The controls must be
carried-out by qualified personnel, either directly or under the strict
supervision of the person in charge of machinery Safety.
Verify that:
ESPE remains blocked (
) intercepting the beams along the
protected area using the specific test piece, following the Fig.12
scheme.
TP14 for light curtains with 14 mm resolution: SG4-14-XX-X
TP30 for light curtains with 30 mm resolution: SG4-30-XX-X