1128500 WPC 2000 User Manual
A-6 Extracts from OSHA and ANSI
Extracts from ANSI B11.1-2009 8.6.2.1
Standards Requirements Explanatory Information
8.6.2.1.7 Each operator’s hand controls shall be
located at a distance from the point-of-operation
so that the operator(s) cannot release either
hand actuating control and reach into the point-
of-operation during the hazardous portion of the
cycle.
E8.6.2.1.7 The total stopping time of the press
should include the total response time of the
control system and the time it takes hazardous
motion to stop. The following formula should be
used when calculating the safety distance (D
s
):
D
s
= K (T
s
+ T
c
+ T
bm
)
Where:
K = 63 inches/second (hand speed constant).
T
s
= the stop time of the press measured from
the final de-energized control element, usually
the air valve.
T
c
= the response time of the control.
T
bm
= the additional time allowed by the
stopping-performance monitor (brake monitor)
before it detects stop time deterioration.
NOTE – T
s
+ T
c
are usually measured by a stop
time measuring device.
When the press stopping-performance monitor
setting is changed, the safety distance should
be recalculated. See also Annex C.
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