Wintriss Shadow 8 - ANSI Safety Distance Formula

1139300 Shadow 8 User Manual
2-6 Installation and Checkout
Now, we will calculate safety distance:
D
s
= 63 x T
s
D
s
= 63 x .287
D
s
= 18.08 in.
Using the OSHA formula, we have calculated that Shadow 8 heads must be mounted at least
18.08 in. from the hazardous area.
ANSI Safety Distance Formula
The ANSI B11.1 safety distance formula, which is recommended by Wintriss, is
D
s
= K x (T
s
+ T
c
+ T
r
+ T
bm
) + D
pf
where
D
s
is the ANSI safety distance in inches
K is the OSHA-recommended hand-speed constant of 63 inches per second
T
s
is the stopping time of the press (or other machine) in seconds
T
c
is the response time of the press control or other machine control
T
r
is the response time of the light curtain
T
bm
is the additional stopping time of the press (or other machine) allowed by the
brake monitor
D
pf
is the depth penetration factor
OBSERVE THE CORRECT SAFETY DISTANCE
• Calculate the safety distance carefully, following the instructions below, and mount your light
curtain heads at least the calculated distance from the hazardous area.
• Mount your light curtain heads at least 7.5 in. (191 mm) from the hazardous area regardless of
the calculated safety distance.
• Be sure your value for T
s
includes the response times of all devices that react to stop the press.
If your measurement of stop time does not include response time of the press control, light
curtain, and any other devices that react to stop the press, the safety distance will be too short.
• Enabling floating blanking increases the depth penetration factor (Dpf) and, therefore, will
increase your safety distance. Enabling fixed blanking may also increase Dpf and safety distance.
Failure to comply with these instructions will result in death or serious injury.
USE BRAKE MONITOR TO CHECK STOPPING TIME
Use a brake monitor where a Shadow 8 light curtain is installed to protect operators whose hands
are routinely exposed to a hazardous area, as required by OSHA 1910.217 (c) (3) (5). A brake
monitor continually checks that the machine’s stopping time does not exceed a predetermined limit.
Failure to comply with these instructions will result in death or serious injury.
DANGER
!
DANGER
!