Process and device for regulating drafting equipment, in particular in carding machines
US5815889A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 10, 1997 |
| Grant date | Oct 6, 1998 |
| Priority date | — |
| Expiry date | Jan 10, 2017 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD01H5/42
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A method of regulating a drafting arrangement, in which measuring signals are acquired at a feed end of the drafting arrangement, compared with a set value to provide a differential signal, and an adjusting signal for the control unit of a variable speed motor for the pair of drafting rollers is derived from the differential signal, provides reliable control results and adjustment of the sliver where a difference has been detected. Set values are entered by a transfer address from a set-point register. The basic speed is derived from actual speed of a doffer and supplied as basic voltage to the control unit of the variable speed motor. A measuring clock pulse of low frequency is generated, dependent upon a roller of the drafting arrangement. With every measuring clock pulse a measuring signal is obtained, converted into a digital signal, compared with the activated transfer address of the set-point register and a differential signal is generated. The differential signal obtained is transformed into a transfer address for a correction register, and that the control value read by the activated address in the correction register is supplied to the control unit of the variable speed mo…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.