Wintriss autoset 1500, User Manual

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AutoSet User Manual 1137200
Installation 2-17
additional tonnage “blips,” it replaces the tonnage reading of interest, which occurs near the
bottom of the stroke, with these false readings.
A zero cam is strongly recommended for presses that, when running in Continuous mode,
generate abnormally high or low tonnages near the top of the stroke during the first few
strokes after startup. These tonnage “incidents,” which are produced by vibrations (also
called “ringing”) or start-up torque, generate inaccurate tonnage measurements and are
capable of corrupting the tonnage samples AutoSet uses to calculate setpoints.
Using a Zero Cam on AutoSet Plus Units
Some tonnage monitors can zero themselves without any external signal if they are
monitoring high setpoints only. Repeatability, or stroke-to-stroke, monitoring requires an
external input from a zero cam. The zero signal can be supplied by a latching magnetic cam
switch (LMCS), Candy switch, proximity sensor, or an electronic limit switch.
Wintriss provides a latching magnetic cam switch (LMCS) with AutoSet Plus. The following
steps explain how to install the LMCS and magnets.
Installing the Latching Magnetic Cam Switch (LMCS)
The Latching Magnetic Cam Switch (LMCS) available from Wintriss consists of the
following parts:
•
A sensor mounted on a bracket with wiring for connection to the AutoSet processor board
•
A red magnet to attach to the crankshaft or other rotating member at 240° of press rotation
•
A blue magnet to mount at 30° of press rotation
•
Two brass screws, one for mounting each magnet
To install the LMCS, do the following:
1.
Select a mounting site that allows the magnets to rotate one-to-one with the press
crankshaft. The ideal mounting location is the crankshaft itself. Alternative sites are the
pitman above the adjusting screw or a drive shaft to a feed or other device.
2.
Mount the two magnets as shown in Figure 2-13, page 2-18.
Position the red magnet so it closes the cam switch at an angle of 240°. Locate the blue
magnet so it opens the cam switch at an angle of 30°. There should be a dwell of 150°
between the two magnets across the top of the stroke. The LMCS should be open while
the part is being formed.
Magnets should be installed plastic side up with a non-ferrous metal screw. A ferrous
screw may cause false signals. A brass screw (6-32) is supplied with each magnet. Use a
No. 36 drill and a 6-32 tap.
For high-speed presses, Wintriss recommends that you use a brass screw, not epoxy or
nylon. If the epoxy does not hold or if the nylon screw breaks, the magnets can become
dangerous projectiles.
NOTICE