Pinnacle Systems SLT Series - Manual (Page 27)

A-3
Appendix A:
Regulations & Guidelines for Safe Operation
SLT Series
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When a light system is used to protect the operator or
passerby from penetration, it must be mounted and
properly sized (grid length) so it is impossible to reach
under, around, or over into the hazardous point of
operation zone. Infrared light systems normally guard
the front or feed area of a machine. The sides or the
areas where the light screen does not guard must be
guarded by some other means.
If the position of the safety light curt ain will allow the
operator or others to place themselves between the
sensing field and the hazardous area, auxiliary guards
or devices such a safety mats, barrier guards or devices
should be used in conjunction with the safety light curtain
to prevent the operator or others from exposure to the
hazardous area.
If mechanical guards such as: polyurethane, expanded
or perforated metal, hairpins, etc. are used to guard these
areas, the opening must comply with the OSHA safety
distance in relationship to the openings.
After installation of point of operation guards and before
a job is released for operation, a check should be made
to verify that the guard will prevent the operators hands
from reaching into the point of operation or any hazard
zone.
Table 0-10: Mechanical Guards
Distance of opening from Maximum
point of operation width of
hazard (inches) opening (inches)
1/2 to 1-1/2 1/4
1-1/2 to 2-1/2 3/8
2-1/2 to 3-1/2 1/2
3-1/2 to 5-1/2 5/8
5-1/2 to 6-1/2 3/4
6-1/2 to 7-1/2 7/8
7-1/2 to 12-1/2 1-1/4
12-1/2 to15-1/2 1-1/2
15-1/2 to 17-1/2 1-7/8
17-1/2 to 31-1/2 2-1/8
The table above shows the distances that guards should
be positioned from the nearest point-of-operation
hazards.
The various openings are such that for average size
hands, an operator’s fingers will not reach the point of
operation.
After installation of point-of-operation guards and before
a job is released for operation, a check should be made
to verify that the guard will prevent the operator’s hands
or other body parts from reaching the point of operation.