8-2 US Safe Distance Formulas
8 Safe Mounting Distance
16
T
s
= the stop time of the press (or machine) in seconds, measured from the final de-energized control element.
Measured at maximum closing velocity.
T
c
= the response time, in seconds, of the press or machine control circuit to activate the machine’s brake.
Note:
T
s
+ T
c
is usually measured together by a stop time measuring device.
T
r
= the response time of the F3SL system, in seconds.
This response time is given in 2-2 Technical Specifications on page 2.
T
bm
= the additional stopping time, in seconds, allowed by the brake performance monitor before it detects stop
time deterioration.
The T
bm
factor allows consideration for brake wear, adding extra stop time allowed by the brake monitor. There-
fore, T
bm
= Brake monitor set point - (T
s
+ T
c
).
Note:
If the guarded machine is not equipped with a stop time performance monitor, a percentage increase fac-
tor should be applied to the stop time of the machine to allow for braking system wear. Contact your ma-
chine manufacturer for information.
D
pf
= This is related to the minimum object sensitivity of the F3SL system. By knowing the minimum object sen-
sitivity, S, of the F3SL system, D
pf
is read directly from Table 5-4 depending on the F3SL model being installed.
Summary of Contents for F3SL
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