
Installation
AutoSet 1500 User Manual
18
Ch 2
1088500
CORRECT ZERO SIGNAL SETTING
The zero signal must come on approximately at 240° and turn off at 30°. (The
zero signal is a closure to ground. That means during the zero signal the cam
switch must be closed. The closed switch makes a connection between the zero
cam terminal (pin 2) and GND (pin 5) on connector TB1 (see Figure 2-9).
If using a latching magnetic cam switch that uses magnets to turn the switch on
and off, make sure you install the magnets at 240° and 30°. See instructions with
switch for proper installation. Make sure that the zero signal does not turn off
until after top dead center (TDC). For other types of switches (like a Candy
switch), you can set the switch after wiring is complete.
Data Instruments provides a latching magnetic cam switch (LMCS) which you can obtain for
AutoSet. The following steps explain how to install the LMCS and magnets.
How to install the LMCS and magnets
1. Select a mounting site for the LMCS and the magnets so that the magnets rotate
1:1 with the crankshaft of the press. Ideally this is the crankshaft itself. However,
you might also use the pitman
above
the adjusting screw or a drive shaft to a feed
or other device.
2. Fabricate a bracket to position the LMCS 1/16" to 1/8" from the face of the
magnets. If possible, make the bracket adjustable. To aid in mounting, the
LMCS is supplied with a slotted mounting bracket. These slots are 1.5" apart,
and approximately .1875" (3/16) wide by .75" long. Use size 6-32 hardware and
lock washers. Install the LMCS as shown in Figure 2-8.
3. To mount the magnets, make sure that you use non-magnetic brass or nylon
screws, or epoxy adhesive. The magnets should be installed plastic side up with a
non-ferrous metal screw. It is important not to use a ferrous screw because it could
cause false signals. A brass screw (6-32) is supplied. Use a No. 36 drill and a 6-
32 tap.
NOTE: FOR HIGH-SPEED PRESSES, DI RECOMMENDS THAT YOU USE
THE BRASS SCREW, NOT EPOXY OR NYLON SCREWS TO MOUNT
THE MAGNETS. IF THE EPOXY DOES NOT HOLD OR IF THE
NYLON SCREWS BREAK, THE MAGNETS CAN BECOME
DANGEROUS PROJECTILES.
Position the red magnet so that it closes the cam switch at 240° of stroke. Set the
blue magnet to open the cam switch at 30° of stroke. There should be a dwell of
150° between the two magnets across the top of the stroke, and the switch will be
open during the forming portion of the stroke.