1128500 WPC 2000 User Manual
G-4 Glossary
overrun timing A WPC 2000 feature that provides a backup for top-stop
timing, stopping the press if the top-stop output relay should
fail. Overrun timing is a function of the stopping time of the
press and is influenced by the condition of the brake linings
and press speed. It is also dependent on proper installation of
the overrun limit switch.
palm time The length of time within which the two palm switches on
each Operator Station connected to WPC 2000 must be
activated in order to start the press. This interval is 1/2 (0.5)
second as required by ANSI. If the palm time on any Operator
Station is exceeded, the press will not start. ANSI standards
refer to the palm time as synchronous time.
pinch point The hazardous area between the upper and lower die from
which OSHA mandates that the operator should be protected
by installation of safety equipment such as light curtains, two-
hand controls, and other barriers.
PMA Stands for Precision Metalforming Association.
reset A command issued by the operator that allows the press to
resume operation after it has been stopped due to a
malfunction. The “reset” command clears the fault message
from the WPC 2000 display.
resolver An electrical component mounted on the press used by WPC
2000 to provide continuous information about the position of
the crankshaft and to maintain a count of the number of
revolutions it makes. The resolver, which has internal
windings and works on the principle of inductance, turns at a
one-to-one ratio (1:1) with the crankshaft.
response time The length of time it takes the WPC 2000 control to activate
the machine’s brake.
safety distance The distance from the pinch point that OSHA requires safety
equipment such as light curtains, two-hand controls, and type-
B movable barriers to be mounted to assure the safety of the
operator. The safety distance is calculated using a precise
formula set by OSHA regulations and/or ANSI standards. The
formula uses the results of the ninety degree (90°) stop-time
test.
start time The amount of time it takes the resolver to start turning after
the Dual Safety Valve (DSV) is energized.
security access A feature that gives supervisors the ability to control the level
of access press operators have to WPC 2000 operating modes
and functions.
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