Stepping motor arrangement for driving a silver feed roller in a rotor spinning machine
AssigneeW. Schlafhorst AG & Co.
InventorsHeinz-Georg Wassenhoven, Manfred Lassmann
Life of this patent
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Abstract
A rotor spinning machine has a plurality of simultaneously operated spinning stations each with a spinning rotor, an opening roller, a feed roller for delivering sliver to the opening roller, and a stepping motor connect directly to the feed roller for driving thereof. An actuating arrangement is provided for selectively actuating each stepping motor in a normal increment mode during spinning operation and in a microincrement mode during yarn piecing operations.
Claims6
A rotor spinning machine having a spinning station comprising a spinning rotor, an opening roller, a feed roller for delivery sliver to the opening roller, a stepping motor connected directly to the feed roller for driving rotation thereof, and means for actuating the stepping motor selectively to drive the feed roller including a means for a normal driving mode advancing in normal stepped increments of the stepping motor during normal spinning operation and a means for a second driving mode advancing in shorter stepped microincrements of the stepping motor during yarn piecing operations.
Dependencies are inferred from the claim text.