Wintriss Shadow 8, Руководство пользователя

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1139300 Shadow 8 User Manual
2-10 Installation and Checkout
Increasing Safety Distance for Perimeter Guarding
For perimeter safeguarding, there is another consideration: personnel might be walking while
simultaneously reaching into a safeguarded area. Although there is no commonly accepted
“walking speed constant” like the “hand constant,” you might use ergonomic tables or
possibly even 100 inches per second, which is a conservative European “speed constant.” For
perimeter guarding, the formula would be:
D
s
= (100) x (T
s
+ T
c
+ T
r
+ T
bm
) + D
pf
Increasing Safety Distance To Compensate for Blanking Windows
When you activate a fixed or a floating blanking window, you must increase the calculated
safety distance for each beam that is blanked. Blanking increases the light curtain’s object
sensitivity, the minimum diameter object that the light curtain can detect, and, therefore, the
depth penetration factor used in the ANSI safety distance formula.
When blanking is inactive, Shadow 8 can sense an object 1.18 in. (30 mm) in diameter. The
depth penetration factor (Dpf) with no beams blanked is 3.07 in. (78 mm).
In order to prevent vibration from activating the light curtain unnecessarily, Shadow 8 has
been designed to allow some flexibility in the area covered by programmable fixed blanking
windows. Each fixed blanking window has a positional tolerance of ± 1 beam, allowing a
1-beam window, for example, to expand to 2 beams or contract to no beams without causing a
Curtains Obstructed operating state. As a result, when determining the safety distance for a
fixed blanking window, you must include an additional beam in your calculations.
Each beam you program as a fixed blanking window creates an additional 1.58 in. (40 mm)
gap in the light field (i.e., 2 x 20 mm, the space between beams). For a one-beam fixed
blanking window, therefore, Shadow 8’s object sensitivity is 2.76 in. or 70 mm (1.18 in.+
1.58 in.), and the Dpf is 8.45 in. (214.6 mm). Using this new depth penetration factor in the
DO NOT INSTALL CONTROL INSIDE THE GUARDED AREA FOR PERIMETER GUARDING
The Shadow 8 control must be placed outside the guarded area for perimeter guarding
applications. The guarded machine must only be restarted using a switch located outside and with
a full view of the area of hazardous motion. Use of Start/Restart Interlock operating mode (see
page 3-3) is suitable for this type of application.
Failure to comply with these instructions will result in death or serious injury.
DO NOT CREATE A FIXED BLANKING WINDOW GREATER THAN ONE BEAM UNLESS THE
ENTIRE AREA BETWEEN TRANSMITTER AND RECEIVER IS OBSTRUCTED
Do not blank more than one beam unless the entire area between transmitter and receiver is
blocked by a permanent fixture or is guarded.
Failure to comply with these instructions will result in death or serious injury.
DANGER
!
DANGER
!