Method of controlling the tension of an advancing yarn
US5664409A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 27, 1996 |
| Grant date | Sep 9, 1997 |
| Priority date | — |
| Expiry date | Jun 27, 2016 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD02G1/08
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A method is described for controlling the tension of an advancing yarn, which is crimped in a friction false twist unit of a false twist crimping machine. In accordance with the method, the tension of the advancing yarn is measured downstream of the friction false twist unit and the yarn tension is converted via a time filter and by comparison with a predetermined desired value into an adjustment signal for correcting the friction false twist unit, the control range being determined by defined limit values of the adjustment signal. The adjustment signal is a current value and is corrected adaptively via a PI controller, the control behavior of which takes into account the quotient from the change of the yarn tension and the change of the current value of the adjustment signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.