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SmartPAC 2 with WPC 2000 Integration User Manual 1128600
Installation 2-25
•
Do not try to couple the resolver directly to the crankshaft. Such a placement requires
extreme precision. If the resolver is only slightly off-center, its bearing will be subjected to
side loads well in excess of its rated capacity and will ultimately fail.
•
Do not use flexible couplings, which can be inaccurate, or V belts, which can also be
inaccurate and will slip
•
Do not use a flexible shaft like a speedometer cable. The resolver will lag the crankshaft
because of the twisting of the shaft on start-up. When the crankshaft stops, the resolver will
turn past the true stopping point and snap backward.
Mounting the Resolver
To mount the resolver, perform the following steps:
1.
Mount the resolver by bolting it to the press or other platform at the desired location.
2.
Make sure the press is at TDC.
3.
Rotate the resolver shaft so the keyway is aligned with the arrow on the housing (see
Figure 2-13, page 2-26).
4.
Keeping the keyway aligned with the arrow, attach the chain or drive mechanism.
Wiring the Resolver
To wire the resolver, perform the following steps:
1.
If the resolver cable is not already connected, locate the cable, plug the molded connector
into the resolver (it only goes one way), and twist the locknut so the connection is tight.
2.
Run the resolver cable through conduit from the resolver to one of the knockouts at the
bottom left of the WPC 2000 enclosure.
3.
Find the resolver terminal block, TB 106, on the WPC 2000 Main Processor board (see
Figure 2-14, page 2-28), and remove the L-shaped connector.
4.
Viewing the resolver from the shaft end, determine whether the shaft will turn clockwise
or counterclockwise when the press runs.
It does not matter which direction the resolver turns when the press runs. You adjust for the
direction of rotation when you wire the unit (see
Wiring the Resolver
, next section).
You can run the resolver and overrun limit switch cables through the same conduit (see
Figure 2-1, page 2-4 for an example). If you do so, make sure not to cut the cable and
wires until both the resolver and the overrun limit switch are installed.
NOTICE
NOTICE