Wintriss WPC 1000, User Manual

Page: 53 / 235

1125100 WPC 1000 User Manual
2-26 Installation
Planning Your Overrun Sensor Installation
The overrun sensor consists of a magnetic switch and a magnet. Select a mounting location
for both components that ensures that the magnet moves past the switch once on every stroke
and within 1/8 in. to 3/16 in. (3 mm to 5 mm) of the switch, close enough for the switch to
sense the magnet’s presence. The magnet is mounted to the crankshaft or another component
that rotates identically on every stroke. The switch is hard-mounted to the press or other
surface and remains stationary.
There must be no connection between the overrun limit sensor and the resolver to ensure that
the overrun sensor continues to operate if the resolver or its drive mechanism fails.
To obtain an adequate overrun signal at high speeds, the magnet should be mounted so that it
can be sensed by the switch for between 15° and 25° of the stroke. The interval during which
the magnet is sensed, called the “dwell,” decreases as the diameter of the rotating shaft
increases (see Figure 2-14). Select a shaft whose diameter will allow the sensor to detect the
magnet for the required dwell.
Mounting the Overrun Sensor Switch
The overrun sensor magnetic switch comes already installed in a bracket. Mount the bracket
and switch at a location past which the magnet will pass on every stroke and within 1/8 in. to
3/16 in. (3 mm to 5 mm) of the magnet, referring to Figure 2-15, page 2-27.
Figure 2-14. Overrun Sensor Magnet Placement: Dwell as a Function of Shaft Diameter
INSTALL MAGNET AFTER MOUNTING SWITCH
Install the overrun magnetic switch as instructed in this section. Refer to page 3-7 for instructions
on installing the overrun magnet.
10”
Actuating
Magnet
5” (127 mm) diameter
23 of dwell
o
10” (254 mm) diameter
11 of dwell
o
Crankshaft
5”
23
o
11
o
Optimum dwell: 15 to 25
o o
NOTICE