Claims
- 1. A method for monitoring a traveling yarn at a winding station of an automatic winding machine having an electronic slub catcher which produces a first electric signal responsive to yarn movement and a second electric signal responsive to yarn diameter being outside a predetermined tolerance range as the yarn passes through the slub catcher, the first signal being identified as a dynamic yarn signal and the second signal being identified as a yarn cutting signal, the method comprising the steps of:
- providing means associated with the electronic slub catcher for producing a third electric signal responsive to the presence of yarn in the electronic slub catcher, said third signal being identified as a static yarn signal;
- producing said static yarn signal using said third electric signal producing means; and
- monitoring and evaluating said static yarn signal.
- 2. A method for monitoring a traveling yarn according to claim 1 and further comprising the steps of providing means associated with the electronic slub catcher for producing a fourth electric signal responsive to the absence of said static yarn signal due to the absence of yarn from the electronic slub catcher, said fourth signal being identified as a separating signal and monitoring and evaluating said separating signal.
- 3. A method for monitoring a traveling yarn according to claim 1 and further comprising the steps of:
- deriving said static yarn signal from the alternating voltage produced by the electronic slub catcher; and
- digitizing said static yarn signal for enhanced monitoring and evaluation.
- 4. A method for monitoring a traveling yarn according to claim 1 and further comprising the steps of retaining in a memory location a separating signal generated prior to the expiration of a predetermined time period following the absence of said static yarn signal; determining whether a separating signal is emitted from the slub catcher resulting from a signal generated when the yarn reenters a measuring slit of the slub catcher and when the yarn dimension is outside the predetermined tolerance range; and transmitting said stored separating signal to a yarn manipulating device as a result of a positive determination that a separating signal has been emitted from the slub catcher resulting from a signal generated when the yarn reenters the measuring slit of the slub catcher and when the yarn dimension is outside the predetermined tolerance range.
- 5. A method for monitoring a traveling yarn according to claim 1 and further comprising the steps of retaining in a memory location a separating signal generated as a result of the absence of said static yarn signal; determining whether the dynamic yarn signal is absent during a predetermined time period; and transmitting said separating signal to a yarn manipulating device responsive to a determination that the dynamic yarn signal has been absent for said predetermined time period.
- 6. A method for monitoring a traveling yarn according to claim 1 and further comprising the steps of determining whether a generated separation signal results from a loss of the static yarn signal; increasing the length of a yarn portion unwound during unwinding of detected yarn on an output side of the slub catcher responsive to a positive determination that said generated separation signal has resulted from the loss of the static yarn signal, the amount of increased length being sufficient to cause a yarn portion causing the absence of the static yarn signal to be aspirated by a suction nozzle during a yarn connecting operation.
Priority Claims (1)
Number |
Date |
Country |
Kind |
43 23 994.3 |
Jul 1993 |
DEX |
|
CROSS-REFERENCE TO RELATED APPLICATION
The present application is a continuation-in-part of Hassen et al U.S. patent application Ser. No. 08/275,998, entitled METHOD OF MONITORING THE MOVING YARN AT A WINDING STATION OF AN AUTOMATIC WINDING FRAME Jul. 15, 1994 now abandoned.
US Referenced Citations (13)
Foreign Referenced Citations (8)
Number |
Date |
Country |
0 401 600 A2 |
Dec 1980 |
EPX |
0 419 827 A2 |
Apr 1991 |
EPX |
1 760 969 |
Oct 1973 |
DEX |
2821792 A1 |
Nov 1978 |
DEX |
3623898 A1 |
Jan 1987 |
DEX |
3937824 A1 |
May 1991 |
DEX |
389 470 |
Jul 1965 |
CHX |
526 459 |
Sep 1972 |
CHX |
Continuation in Parts (1)
|
Number |
Date |
Country |
Parent |
275998 |
Jul 1994 |
|