Method and apparatus for machine control
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United States of America Patent
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-
Mar 11, 1997
Issued Date -
N/A
app pub date -
Dec 20, 1995
filing date -
Aug 26, 1994
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A control for machine members propelled at plural points along their length to move linearly transverse to member length determines and eliminates skew of the driven points. Skew is determined from position indicated by position transducers associated with the driven points. Various types of position transducers are accommodated, including encoders having outputs from which member position can be determined only with reference to marker outputs of the transducer. For such encoders, the control effects velocity controlled motion to detect position. Skew is eliminated by relatively moving the driven points by the magnitude of the skew.
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