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SmartPAC 2 with WPC Integration 1126800
Installing SmartPAC 2 and WPC Chapter 2 page 41
Install the Resolver
DANGER
!
RESOLVER OUT OF SYNCH WITH CRANKSHAFT
Retain the sprockets on the crankshaft and resolver shaft mechanically so they cannot ever
shift or move out of radial alignment. Be sure the key on the resolver shaft retains the
resolver sprocket. Use a pin or other method to fix the location of the sprocket on the
crankshaft.
Failure to comply with these instructions will result in death or serious injury.
CAUTION
DAMAGE TO RESOLVER
Be sure that the sprocket or gear driving the resolver chain or timing belt is mounted so it is
centered on the crankshaft. If the gear or sprocket is mounted off-center, the resulting loads
on the resolver shaft may cause the resolver to fail.
Failure to comply with these instructions could result in property damage.
NOTICE
The ram must be at top dead center (TDC) before you install the resolver. Use a dial
indicator on the face of the ram or other means to ensure that the press is at TDC.
NOTICE
INSTALLING A REPLACEMENT RESOLVER
If you are replacing a defective resolver, you may not be able to move the ram to TDC
before mounting the resolver. See page 43 for special instructions for installing the
replacement.
The resolver must be driven smoothly at a 1:1 ratio with the crankshaft of the press. The
resolver signals WPC the exact position of the crankshaft at every degree of the stroke (see
“How WPC works” in Chapter 1). Design a method of driving the resolver directly from the
crankshaft using a chain or timing belt (not a V belt) and sprockets. Use either an idler
sprocket or spring-loaded resolver base to compensate for slack or stretch. It does not matter
which way the resolver turns.
Wintriss Controls Group stocks a spring-loaded base with a hole pattern to match the
resolver. It does not matter which direction the resolver turns. You can switch two wires on
the resolver connector to change the direction of rotation.
The drive you choose must also allow for adjustment of the resolver to its zero position at top
dead center. All sprockets must be keyed or pinned. The resolver shaft has a standard key.
When designing the drive for the resolver, here is what you should not do:
1. Do not use a long, sloppy chain. The distance between the center of the resolver shaft
and the center of the crankshaft should be no more than 3 feet (1 m).