Wintriss wpc 2000 User Manual

WPC 2000 User Manual 1128500
Initialization, Setup, and Checkout 3-23
Putting these values into the formula, we get:
Ds = 63 x (0.190 + 0.059 + 0.035) + 3.07
Ds = (63 x 0.284) + 3.07
Ds = 17.89 + 3.07
Ds = 20.96 in.
The light curtain must be mounted 20.96 in. away from the pinch point.
When using the ANSI formula, be sure to perform the calculations in this order:
(1) Add Ts + Tc + Tr + Tbm first.
(2) Multiply the result by 63.
(3) Add this result to Dpf. This is Ds.
If you do no follow this order, your safety distance calculation will be incorrect.
OSHA Safety Distance Formula
The OSHA safety distance formula as specified in OSHA 1910.217 is
Ds = K x Ts
where
D
s
is the OSHA 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 in seconds
The hand-speed constant indicates how far you could theoretically move your hand and arm in
one second.
The Stopping Time of the press (Ts) is measured at approximately 90° of crankshaft rotation,
or at maximum closing velocity. In addition to the Stopping Time of the press, the OSHA Ts
value must include the following factors:
• Response time of the press control that activates the brake
• Response time of the light curtain
• Additional time (Tbm) added to the Stopping Time to compensate for brake wear
INCORRECT SAFETY DISTANCE
Use the Stopping Time measured in the 90° stop-time test. If you do not do this, the safety
distance may be too small to allow the press to stop before someone reaches the hazardous area.
See Determining the 90° Stop Time, page 3-17 for instructions on performing this test.
Failure to comply with these instructions will result in death or serious injury.
Wintriss recommends that you use the American National Standards Institute (ANSI) formula for
calculating safety distance because it contains more factors, allowing you to calculate the safety
distance more precisely. The ANSI formula is explained in the previous section (see page 3-21).
DANGER
!
NOTICE

Wintriss wpc 2000 Specifications

General

Brand	Wintriss
Model	wpc 2000
Category	Controller
Language	English