Material advance tracking system

The friction drive system for printing, plotting or cutting graphic images on strip material includes a feedback for a drive motor driving a plurality of friction wheels for advancing strip material in a longitudinal direction. The feedback signal includes a short-term response component and a long-...

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Bibliographische Detailangaben
Hauptverfasser:	RICH LEONARD G, WEBSTER RONALD B, GUCKIN MARK E
Format:	Patent
Sprache:	eng
Schlagworte:	CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORSOR DYNAMO-ELECTRIC CONVERTERS CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS CONVERSION OR DISTRIBUTION OF ELECTRIC POWER CONVEYING CORRECTION OF TYPOGRAPHICAL ERRORS ELECTRICITY GENERATION HANDLING THIN OR FILAMENTARY MATERIAL HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS,CABLES i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME LINING MACHINES PACKING PERFORMING OPERATIONS PRINTING SELECTIVE PRINTING MECHANISMS STAMPS STORING TRANSPORTING TYPEWRITERS
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Beschreibung
Zusammenfassung:	The friction drive system for printing, plotting or cutting graphic images on strip material includes a feedback for a drive motor driving a plurality of friction wheels for advancing strip material in a longitudinal direction. The feedback signal includes a short-term response component and a long-term response component to accurately pinpoint the exact longitudinal location of the strip material. The short-term response component is generated by comparing a motor encoder signal from a motor encoder secured to the drive motor with a commanded longitudinal position of the strip material and passing the resultant differential error signal through an all pass filter. The long-term response component is generated by comparing a detecting encoder signal from a detecting encoder secured to a device detecting the actual longitudinal position of the strip material with the commanded longitudinal position of the strip material and passing the differential error signal through a low pass filter.