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Release 7/2009 Ver. 1.0
5.1.3
DAILY/SETTING EXAMINATION
The following tests should be carried out daily by a
designated person appointed by the machine user. The
results should be recorded and a copy should be kept
on or near the machine. Specific statutory requirements
may apply to certain types of machines. The designated
person should:
(a) Check that access to the dangerous parts of the
machine is not possible from any direction not protected
by the light curtain and that side and rear guards are in
order.
(b) Check that the minimum distance from the
dangerous parts of the machinery to the light curtain is
not less than the distance stated on the machine
information label or plate.
(c) Check that it is not possible for a person to stand
between the dangerous parts of the machine and the
light curtain.
(d) Check that when the muting facility (if installed) is
operative, the moving parts are no longer dangerous.
(e) Check that the stopping performance monitor (if
installed) is in use and is set up and functioning
correctly.
(f) Check that electrical enclosures are closed and
locked and that any keys have been removed for
retention by a designated person.
(g) Check for external signs of damage to equipment or
to electrical wiring.
(h) Check the detection capability of the GS-120 as
described in section 5.1.4.
5.1.4
CHECKING DETECTION CAPABILITY
5.1.4.1 GS-120 System
The detection capability of the light curtain should be
checked as required in the previous sections using the
method described below. See Figure 43.
(a) With power applied to the GS-120 system and with
the machine at rest, check that the light curtain is
functioning by observing the state of the appropriate
indicators. The green indicator should be on and the
red indicator should be off.
TAPESWITCH CORPORATION
100 Schmitt Boulevard
Farmingdale, New York 11735
Technical Manual: GS-120 Light Curtain Systems
(b) Insert the test piece provided with the 30 mm model
into the light curtain beams. The axis of the test piece
should be perpendicular to the plane of the light curtain.
Starting at the top of the emitter unit, position the test
piece less than 150 millimeters from the emitter surface,
and pass it slowly down the front of the unit. While the
full diameter of the test piece is within the area defined
by the two arrow markers on the front window, the green
indicator should GO OFF AND REMAIN OFF and the
red indicator should BE LIT AND REMAIN LIT.
(c) Repeat the above test with the test piece inserted
close to the front of the receiver unit and with the test
piece inserted at the midpoint between the emitter and
receiver units.
The indicators should behave as
described above whenever the test piece is between the
arrow markers.
At no time while the test piece is obstructing
the curtain should the green indicator come
on. If it does, the machine must be isolated
and must not be used until the cause has
been investigated.
(d) If the system passes the above tests proceed as
follows. Initiate a cycle of the machine and then insert
the test piece into the curtain. Upon insertion of the test
piece during dangerous motion, the dangerous parts
should come to rest without apparent delay.
If the machine does not stop or there is any
delay in its response, the machine must be
isolated and must not be used until the fault
has been rectified.
Figure 43 – Light Curtain Detection Test
39
WARNING
WARNING
Test piece
<150 mm
<150 mm
Phone: 631-630-0442
Fax: 631-630-0454
www.tapeswitch.com
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