Wintriss WPC 1000, User Manual

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WPC 1000 User Manual 1125100
Extracts from OSHA and ANSI A-9
8.6.3.11 (cont) Means of supplemental safeguarding can
include completely filling the fixed blanked area
to restrict access to the hazard, installing the
device at a distance that accounts for the worse
case object sensitivity (see 8.6.3.16), or
alternate safeguarding may be provided to
prevent access to the hazard.
If means are provided to bypass the device,
visible indication that the device is bypassed
shall be provided. Means to provide visible indication may include
but are not limited to:
a) colored indicator lights;
b) signage;
c) physical position;
d) awareness barrier (i.e., safety tape);
e) other means.
8.6.3.12 The device shall not fail to respond to
the presence of the individual’s hand or other
body part due to the presence of a reflective
object or workpiece.
8.6.3.13 The device shall conform to the
requirements of 6.11 and 8.8. In the event of a
power failure to the device, the device shall
initiate a stop command to the press control
system.
8.6.3.14 The interface of the presence-sensing
device to the press control shall conform to the
requirements of 6.11 and 8.8.
8.6.3.15 The sensitivity of the device to
intrusion shall not be adversely affected by
changing conditions around the press.
8.6.3.16 The effective sensing field of the
device shall be located at distance from the
nearest point-of-operation hazard so that
individuals cannot reach into the point-of-
operation with a hand or other body part before
cessation of motion during the hazardous
portion of the cycle. E8.6.3.16 The total stopping time of the press
should include the total response time of the
presence-sensing device, as stated by the
supplier, the response time of the interface, the
response time of the control system, and the
time it takes the press to cease slide motion.
The following formula should be used when
calculating the safety distance:
Ds = K (Ts + Tc + Tr + Tbm) + Dpf
where
K = 63 inches/second (hand speed constant)
Ts = the stop time of the press measured from
the final de-energized control element, usually
the air valve
Tc = the response time of the press control
Tr = the response time of the presence-sensing
device and its interface, if any, as stated by the
supplier or measured by the user.
Extracts from ANSI B11.1-2009 8.6.3
Standards Requirements Explanatory Information