Printer on-line diagnostics for continuous low frequency motion

Details Printer on-line diagnostics for continuous low frequency motion Printer on-line diagnostics for continuous low frequency motion

1996-03-18

1998-03-24

Pendegrass, Joan H.

Electrophotography

Diagnostics

399 36, 73659, 340683, 36455101, G03G 1500, G01D 700

Patent

active

057323062

ABSTRACT:
A method and apparatus for accurately and quickly enabling a technical representative to diagnose the source (or identify the component(s)) that is the root cause of the motion quality defect being experienced to reduce down time of the printing machine. The output of an encoder on the photoreceptor, electronically measured, translates variations in the photoreceptor velocity into voltage. The voltage is then converted into frequency, using a Fast Fourier Transform, for comparison to a predetermined set of frequencies associated with defective drive components to identify the source of the motion quality defect.

REFERENCES:
patent: 4341995 (1982-07-01), Hennick
patent: 4425798 (1984-01-01), Naigi et al.
patent: 5311255 (1994-05-01), Josephson
patent: 5582192 (1996-12-01), Williams, III
patent: 5679900 (1997-10-01), Smulders

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