The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 23, 2003
Filed:
Mar. 10, 2000
Michael Donald Langiano, Berthoud, CO (US);
Christopher Turner, Longmont, CO (US);
Exabyte Corporation, Boulder, CO (US);
Abstract
A cleaning wheel positioning mechanism for precisely controlling the contact pressure of a cleaning wheel against a recording drum in a magnetic recording system is presented. In accordance with the invention, the cleaning wheel positioning controller uses knowledge of the drum drive motor voltage (or current) to detect the contact pressure of the cleaning wheel against the drum. During a cleaning operation, which preferably occurs automatically during a periodic cycle, the cleaning wheel positioning controller first detects a reference drum motor voltage/current based on the drum drive motor voltage/current when the cleaning wheel is in its fully retracted position. Cleaning wheel positioning controller then monitors the drum drive motor voltage/current, and compares it to the reference drive motor voltage/current. When a predetermined amount of increase in drum drive motor voltage/current over the reference voltage/current value occurs, which indicates that the cleaning wheel is positioned against the drum, the cleaning wheel positioning controller effectuates the halting of movement of the cleaning wheel rack, preferably by turning off the cleaning wheel drive motor.