US 4,515,320 AGranted

Traverse winding frame for producing the winding of a package

AssigneeMaschinenfabrik Schweiter AG

InventorsWalter Slavik, Arthur Rebsamen

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Abstract

A winding station in a traverse winding frame for winding thread on a package comprises a belt drive for rotating a cheese or bobbin via a driving roller and a grooved drum for thread laying. The grooved drum drive has a continuously variable gear, whose speed is continuously variable by an adjusting linkage. The speed of the cheese and the grooved drum is measured by two tachometers and supplied as a corresponding signal to a computer, in which the actual value calculated from the two signals is compared with a desired value stored in the computer and a correction signal is then fed to a control element for adjusting the adjusting linkage. Thus, the cheese can be wound with a thread winding, which combines the advantages of a random winding with a constant pitch angle and a precision winding with a substantially constant turns ratio during partial windings, without suffering from their disadvantages.

Claims5

Dependent claims

A transverse winding frame for precision winding of thread into a package, comprising:

package support means for rotatably supporting a package to be wound with thread;
a rotatably mounted friction roller for rotatably driving the package;
a rotatably mounted cam shaft supporting a thread laying device;
a single constant-speed drive motor for powering rotation of said friction roller and said cam shaft;
a belt transmission coupling said drive motor to said friction roller and said cam shaft;
infinitely variable transmission means, coupling said belt transmission to said cam shaft, for varying rotation speed of said cam shaft, said variable transmission means including a servomotor for operating said variable transmission means;
first and second tachometers operatively coupled to said package support means and said cam shaft, respectively, for generating output signals representative of rotation speeds of the package and said cam shaft;
and
control means, coupled to said tachometers and said servomotor, for comparing said output signals of said tachometers and for transmitting a control signal to said servomotor dependent upon said output signals and upon preprogrammed helix angle tolerances and winding ratios.

6 more elements

Dependencies are inferred from the claim text.