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SSC-1500 Part Revolution Solid-State Control
SECTION 3—INSTALLATION OF COMPONENTS
Sprocket Assembly
(If furnished)
Existing sprockets may be reused, or two sprockets with an identical number of teeth (usually 48)
may be supplied. They are used to drive the resolver/pulser assembly. The standard set consists of
one sprocket with the proper bore, keyway and setscrews to mount directly on the shaft extension
of the resolver. The other sprocket is flat with a small rough bore. This sprocket is normally
mounted on the end of the machine crankshaft by drilling and tapping two suitable mounting
holes in the sprockets and crankshaft and using spacer blocks, if necessary, to provide clearance
for the chain. These sprockets use a standard ANSI No. 35 roller chain and connecting links.
When installing the drive chain, it will be necessary to adjust the length of the chain in order to
obtain proper action of the spring-loaded base of the resolver assembly. The normal position of
the two hinged plates, on the resolver/pulser assembly, is approximately parallel with each other
when the chain is installed. The spring is normally positioned between the two plates when the
chain is pulling down (see Photo 3.21). When the chain is pulling up, the spring is above the
top plate (see Photo 3.22).
If a chain and sprocket drive already exists on a particular machine, it may be modified to drive the resolver. The resolver must always rotate exactly
one revolution for each revolution of the machine crankshaft, therefore, the number of sprocket teeth must always match.
Note: If the press has a direct-coupling drive arrangement from the press or other timing device, the sprockets and spring-loaded base are not
required. The spring base is furnished as a chain tightener, to help with misalignment and for shock isolation only. It is not used to detect
chain breakage.
Roller Chain
(If furnished)
Ten feet of ANSI No. 35 chain is usually furnished with each part revolution control system. This chain is to be used
with the supplied set of sprockets. A special master link for coupling the chain is furnished and this is used to connect
the chain once the exact length has been determined.
Chain
Pulling Up
Photo 3.22
Photo 3.20
Part No. CML-000
Photo 3.23
Part No. 515
Chain
Pulling
Down
Photo 3.21
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