Adjusting drawframe

US 6,499,194 B1
Adjusting drawframe
Götz Theodor Gresser, Winterthur (Switzerland); Christian Müller, Winterthur (Switzerland); and Christian Griesshammer, Winterthur (Switzerland)
Assigned to Maschinenfabrik Rieter AG, Winterthur (Switzerland)
Filed on 30-Oct-2000, as Appl. No. Maschinenfabrik Rieter AG, Winterthur (Switzerland)
Int. Cl.7D01H 5/32

US 6,499,194 B1 Adjusting drawframe Götz Theodor Gresser, Winterthur (Switzerland); Christian Müller, Winterthur (Switzerland); and Christian Griesshammer, Winterthur (Switzerland) Assigned to Maschinenfabrik Rieter AG, Winterthur (Switzerland) Appl. No. 9/719,274PCT Filed Jun. 11, 1999, PCT No. PCT/CH99/00255§ 371(c)(1), (2), (4) Date Mar. 19, 2001, PCT Pub. No. WO99/66113, PCT Pub. Date Dec. 23, 1999. Claims priority of application No. 1277/98 (CH), filed on Jun. 12, 1998; and application No. 2507/98 (CH), filed on Dec. 18, 1998. Int. Cl.7D01H 5/32 U.S. Cl. 198212;239 48 Claims 1. A method to control drafting of a fiber mixture of a textile machine, with means being provided which detect fluctuations in mass of the fiber mixture which is supplied to a drafting arrangement unit comprising at least one changeable drafting zone which compensates for the fluctuations in mass, and a delay time being provided in order to take into account running time of the fiber mixture from a measuring element up to a control application point, wherein in that for changing certain control parameters delivery speed of the fiber mixture and comparison of the measured progress of the mass of the fiber material supplied by the drafting arrangement unit with a predetermined setpoint progress of mass are used; wherein positioning of the control application point to the measuring element is corrected depending on the delivery speed of the fiber mixture; and wherein distance from the control application point to the measuring element is reduced with rising delivery speed.