Honeywell SmartPAC 2, User Manual, Page: 66 / 522

1126800 SmartPAC 2 with WPC Integration
Page 44 Chapter 2 Installing SmartPAC 2 and WPC
Install the Overrun Limit Sensor Magnetic Switch
DANGER
!
OVERRUN LIMIT SENSOR DOES NOT PROVIDE CORRECT TIMING
• Install the overrun limit sensor so that the magnet is attached to a component, such as the
crankshaft, that always moves with the motion of the press, regardless of the condition of the
resolver or the resolver’s drive mechanism. Safe operation of the press depends on the
overrun limit sensor’s correct operation when the resolver or its drive mechanism fails.
•
Install the overrun limit switch magnet in the correct angular location according to the
instructions in this manual.
Failure to comply with these instructions will result in death or serious injury.
The overrun limit switch, also known as the overrun limit sensor, provides a signal to WPC
at the same point on every stroke. This enables WPC to check the resolver’s operation. If,
for some reason, the resolver is no longer rotating at a 1:1 ratio with the crankshaft, WPC
receives the signal from the overrun sensor at an unexpected point in the stroke. WPC then
signals an emergency stop and displays an error code. This kind of error can occur when the
resolver drive chain breaks or slips, or if the resolver is broken.
Align magnetic
switch with center
of crankshaft
Crankshaft
Gap between
magnet and
magnetic switch:
1/8” to 3/16”
(3.2 to 4.7 mm)
View A
Crankshaft
Press
Bracket
attached
to press
Magnetic switch
Magnet location
(Place magnet here
temporarily
to set gap.)
Note:
The magnetic switch
can be mounted in any
orientation, as long as
the magnet passes
1/8” to 3/16” away from
it once per stroke.
Figure 2 - 8. Overrun Sensor Magnetic Switch Installation Example