Method for compensating a gear backlash and apparatus for carrying out said method

Patent 7458568 Issued on December 2, 2008. Estimated Expiration Date:

September 26, 2022. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.

Abstract Claims Description Full Text

Patent References

Web tracking apparatus
Patent #: 4061222
Issued on: 12/06/1977
Inventor: Rushing

Belt tracking system
Patent #: 4174171
Issued on: 11/13/1979
Inventor: Hamaker , et al.

Print guide mechanism
Patent #: 4493571
Issued on: 01/15/1985
Inventor: Potter

Method and apparatus for belt steering control
Patent #: 5248027
Issued on: 09/28/1993
Inventor: Kluger, et al.

Driving, steering and tensioning roll for belt loops
Patent #: 5717984
Issued on: 02/10/1998
Inventor: Wong

Method and apparatus for controlling backlash in motor drive systems
Patent #: 5729100
Issued on: 03/17/1998
Inventor: Rothstein, et al.

Method and apparatus for optically measuring drive train backlash
Patent #: 6255645
Issued on: 07/03/2001
Inventor: Gardner, Jr, et al.

Backlash compensation using neural network
Patent #: 6611823
Issued on: 08/26/2003
Inventor: Selmic , et al.

Backlash correction device and backlash correction method Patent #: 6695505
Issued on: 02/24/2004
Inventor: Iimura , et al.

Inventors

Assignee

Oce Printing Systems GmbH

Application

No. 10491088 filed on 09/26/2002

US Classes:

271/10.01Separator and conveyor

Examiners

Primary: Bollinger, David H.

Attorney, Agent or Firm

Schiff Hardin LLP

Foreign Patent References

0 608 124 EP 01/01/1994
0 699 968 EP 08/01/1995
0408065 JP 03/01/1992
99/08374 WO 02/01/1999
00/34831 WO 06/01/2000
01/11432 WO 02/01/2001

International Class

B65H 5/00

Abstract

An electrographic printer using a print web medium is provided with a web adjusting apparatus having a geared motor for adjusting the web position. A method and apparatus to compensate for backlash in the geared motor includes a sensor to detect an end position of rotation of the geared motor. A time being determined from a point of reversal of the geared motor to a decay in the sensor output indicating a gear backlash, and the time being added to the drive of the geared motor when reversing directions to adjust the web position.