The Semelex II Safetimeter Checks Stop
Safety Distance and More...
(Ts) is the time interval
from the initiation of the stop signal to the complete stop of
the press. Stop time can change as a result of wear, speed, machine
use, solenoid valve response, die weight, and other factors.
State and Federal guidelines require periodic checking of stop
(Ds) is the distance between the location
of two-hand control or personnel safety devices and the pinch
point closest to the operator. OSHA regulation 1910.217(c)(3)(iii)(e)
expresses Safety Distance using the following formula:
Ts x 63 inches/sec
the Semelex II Safetimeter will display the minimum safety distance
per the OSHA formula.
be easily checked by measuring the down- and up-stroke stop time.
When these two times are the same, counter-balance is properly
Safety Devices like light curtains or
safety mats can be tested using the Auto-Hand and Auto-Flag to
verify reaction time per the OSHA formula. The overall response
time of the safety device, press control E-Stop circuit, and
the clutch brake mechanism are checked when the Auto-Hand or
Auto-Flag accessories are used.