Wintriss WPC 1000, User Manual, Page: 49 / 235

1125100 WPC 1000 User Manual
2-22 Installation
Installing the Resolver
Because the resolver must provide WPC 1000 with the exact position of the crankshaft at
every degree of the stroke (see Resolver, page 1-1), the device must be driven smoothly at a
1:1 ratio with the crankshaft of the press. 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 a spring-loaded resolver base to compensate for slack or stretch.
The drive method 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. Wintriss Controls Group stocks a spring-loaded base with a hole pattern to
match the resolver.
When designing the drive for the resolver, observe the following precautions:
•
Do not use a chain more than three feet in length
•
Do not use gears, right-angle joints, or shafts with universal joints, which will develop
either too much backlash or too much play
•
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.
RESOLVER OUT OF SYNCH WITH CRANKSHAFT
Retain the sprockets on the crankshaft and resolver shaft mechanically so they cannot shift or
move out of radial alignment. Be sure that the key on the resolver shaft retains the resolver
sprocket. Use a pin or other method to fix the position of the sprocket on the crankshaft.
Failure to comply with these instructions will result in death or serious injury.
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 unit to fail.
Failure to comply with these instructions could result in property damage.
DANGER
!
CAUTION