Winding apparatus for textile threads
AssigneeRieter Machine Works, Ltd.
InventorGelli Spescha
Life of this patent
Estimating the term…
Abstract
The speed of the friction drive drum is electronically controlled as a function of the thread speed. The apparatus allows winding of a precision wound package or a random wound package. The apparatus employs an electronic control unit which calculates a desired value signal for the speed of the drive drum as a function of the thread speed from a mathematical formula and compares this value to the actual value in order to obtain a correction signal for the drive of the drive drum. A similar calculation is also made for controlling the speed of the traversing thread guide shaft.
Claims14
A winding apparatus for textile threads comprising
- a rotatable bobbin chuck for forming a bobbin package thereon;
- a friction drive drum for rotating a bobbin package on said chuck;
- a thread guide for guiding a thread to said bobbin chuck to form a bobbin package;
- a helical groove shaft for moving said thread guide transversely of said chuck;
- a first drive having a speed control for rotating said friction drive drum;
- a second drive having a speed control for rotating said helical groove shaft;
- an electronic control unit including first means for calculating the rotational speed (f.sub.RS) of said friction drive drum as a function of the thread speed in accordance with a mathematical formula, said means receiving the desired value of the thread speed (V.sub.F) and the desired value of the rotational speed of said helical groove shaft (f.sub.C) wherein said speed control of said first drive adjusts the speed of said friction drive drum in accordance with the calculated rotational speed (f.sub.RS).
A winding apparatus for textile yarns comprising
- a rotatable bobbin chuck for forming a bobbin package thereon;
- a friction drive drum for rotating a bobbin package on said chuck;
- a thread guide for guiding a thread to said bobbin chuck to form a bobbin package;
- a helical groove shaft for moving said thread guide transversely of said chuck;
- a first drive having a speed control for rotating said friction drive drum;
- a second drive housing a speed control for rotating said helical groove shaft;
- at least one computing element for receiving a first signal representative of the desired thread speed (V.sub.E) and a second signal representative of a desired rotational speed (f.sub.CS) of said helical groove shaft, said element emitting a calculated signal representative of the desired rotational speed (f.sub.R) for said drive drum in response to said first and second signals, said element being connected to said speed control of said first drive to deliver said calculated signal thereto;
- and
- a tachometer connected between said drive drum and said speed control of said first drive for delivering a momentaneous signal to said speed control representative of the actual speed of said drive drum for comparsion wtih said calculated signal whereby said speed control adjusts said first drive to rotate said drive drum at a speed to match said momentaneous signal with said calculated signal.
Dependencies are inferred from the claim text.