Wintriss SmartPAC2 User Manual

1126700 SmartPAC 2 User Manual
6-24 Run Mode
* Includes extensions for Shadow VII and Shadow 8 models
T
bm is time added to the other response times in the ANSI formula to reflect
brake wear. It is
calculated as follows:
Tbm = stop time limit – stopping time at top stop
The stop time limit is calculated in Initialization (see page 4-9). You can determine the
stopping time at top stop by performing the stop-time test procedure shown on page 6-20.
The depth penetration factor Dpf is a measure of how far an object, like an operator’s hand,
can move through the light curtain before the light curtain reacts. D
pf
is related to the light
curtain’s object sensitivity, the smallest diameter object the light curtain can detect anywhere
in its field.
Object sensitivity (S) for Shadow 8 is 1.18 in. (30 mm) with beam centers of 0.79 in. (20 mm).
(See Table 6-2 for object sensitivity of other Shadow models.) Based on S and ANSI B11.1
(2009), D
pf = 3.07 in. (78 mm)
.
Example: Calculating the Safety Distance Using the ANSI Formula
The ANSI formula for calculating the safety distance is
D
s
= K x (T
s
+ T
c
+ T
r
+ T
bm
) + D
pf
We will use the following numbers in the formula:
K = 63 inches per second
T
s
+ T
c
= 0.190 sec. (result of 90° stop-time test)
T
r
= .059 sec. (response time of Shadow 8 with 202 in. combined length including extensions)
Let's take T
bm
from Example 2 in the Calculating the Stop Time Limit procedure, page 4-9.
T
bm
= 0.210 sec. (stop time limit) – 0.175 sec. (stop time at top stop) = 0.035 sec.
D
pf
= 3.07 in. (Shadow 8 depth penetration factor)
Now let's put our numbers into the formula:
D
s
= 63 x (0.190 + .059 + .035) + 3.07
D
s
= (63 x .284) + 3.07
D
s
= 17.89 + 3.07
D
s
= 20.96 in. or, rounding 21.0 in.
The distance the light curtain must be mounted from the pinch point in our example is 21.0 in.
Shadow 8 Up to 42 in. 23 mS
1.18 in.
Up to 85 in. 32 mS
Up to 128 in. 41 mS
Up to 171 in. 50 mS
Up to 202 in. 59 mS
Table 6-2. Shadow Light Curtain Response Time and Object Sensitivity (Cont.)
Shadow Model Head Length * Response Time Object Sensitivity

Wintriss SmartPAC2 Specifications

General

Brand	Wintriss
Model	SmartPAC2
Category	Controller
Language	English