Wintriss wpc 2000, User Manual

Page: 205 / 250

1128500 WPC 2000 User Manual
A-14 Extracts from OSHA and ANSI
8.3.2 Installation, operation and maintenance
8.3.2.1 Exposure to the hazard(s) shall not be
possible by reaching over, under or around the
sensing field of the device. Additional guards or
safeguarding devices shall be provided to
protect those areas. E8.3.2.1 The user should select a presence-
sensing device adequate to prevent individuals
from reaching over, under or around the sensing
field during the hazardous portion of the
machine cycle. Additional safeguarding may be
required in conjunction with the device to meet
this requirement.
The effective sensing field shall be of adequate
height, width, and depth so that entry of the
individual into the hazard area is detected. If individuals can place themselves between the
sensing field and the hazard area, additional
safeguarding should be used in conjunction with
the device to prevent the individual from
exposure to the hazard.
When an individual can pass through the
sensing field, see the requirements of 8.3.2.3.
The electro-optical presence-sensing device
may fail to detect an individual's presence due
to reflective workpieces or objects in the vicinity
of the device. Care should be used to ensure
that these reflections do not render the device
ineffective.
Some examples of reflective objects include, but
are not limited to:
machine surfaces;
tooling;
work pieces;
hand tools;
auxiliary equipment;
workholding tables and fixtures.
Testing each set-up for minimum object
sensitivity should be done with an appropriate
test rod, following the supplier's
recommendation.
Where objects are placed within the defined
sensing field of an area optical laser scanner,
care should be taken to ensure that:
a) No shadows exist behind the objects such
that the device is rendered ineffective;
b) Removal of the object will not allow
undetected access to a hazard area.
Extracts from ANSI B11.19-2003 8.3
Standards Requirements Explanatory Information