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The bar code symbol itself is a coded pattern of graphic indicia comprised of a series of bars of various widths spaced apart from one another to bound spaces of various widths, the bars and spaces having different light reflecting characteristics. Various optical scanning systems and readers have been developed heretofore for reading indicia such as bar code symbols appearing on a label or on the surface of an article. The invention generally relates to electro-optical readers and in particular to a bi-directional motor drive for affirmatively driving a scanning element in opposite directions and, more particularly, to monitoring drive failure. The method of claim 6, wherein the predetermined range of SOS frequencies is ☒0% of the resonant frequency. The method of claim 6, and the step of generating a laser shut-off signal when the malfunction is sensed.ġ0. The method of claim 6, wherein the zero crossing detecting is performed by a comparator.ĩ. The method of claim 6, wherein the scanning element is a light reflector.Ĩ. A method of detecting a malfunction of a bi-directional motor drive in a reader for electro-optically reading indicia, the method comprising the steps of: a) mounting a rotor of a resonant motor for oscillation about an axis b) mounting a permanent magnet for joint oscillation with the rotor c) mounting a scanning element for joint oscillation with the rotor d) directing a light beam at the indicia to be electro-optically read e) generating a drive signal to drive the rotor, the magnet and the scanning element in opposite directions about the axis over the indicia at a resonant frequency f) generating a feedback signal having a feedback frequency corresponding to the resonant frequency during oscillation of the magnet g) detecting zero crossings of the feedback signal to generate a start of scan (SOS) signal having an SOS frequency and h) monitoring the SOS frequency, and sensing the malfunction when the SOS frequency is outside a predetermined range of SOS frequencies.ħ. The arrangement of claim 1, wherein the predetermined range of SOS frequencies is ☒0% of the resonant frequency.Ħ. The arrangement of claim 1, wherein the processor generates a laser shut-off signal when the malfunction is sensed.ĥ. The arrangement of claim 1, wherein the zero crossing detector is a comparator having one input connected to a reference voltage, another input to which the feedback signal is conveyed, and an output from which the SOS signal is conveyed to the processor.Ĥ. The arrangement of claim 1, wherein the scanning element is a light reflector.ģ. An arrangement for detecting a malfunction of a bi-directional motor drive in a reader for electro-optically reading indicia, the arrangement comprising: a) a resonant motor having a rotor oscillatable about an axis b) a permanent magnet jointly oscillatable with the rotor c) a scanning element jointly oscillatable with the rotor, and operative for directing a light beam at the indicia to be electro-optically read d) a drive coil in operational proximity with the magnet, and operative for generating a drive signal to drive the rotor, the magnet and the scanning element in opposite directions about the axis over the indicia at a resonant frequency e) a feedback winding in operational proximity with the magnet, and operative for generating a feedback signal having a feedback frequency corresponding to the resonant frequency during oscillation of the magnet f) a zero crossing detector for detecting zero crossings of the feedback signal to generate a start of scan (SOS) signal having an SOS frequency and g) a control processor for monitoring the SOS frequency, and for sensing the malfunction when the SOS frequency is outside a predetermined range of SOS frequencies.Ģ.
#Welch allyn it3800 driver download software#
If your software version begins with “2” (2.x) or “1” (1.x) you cannot use this update.1. Please determine your software version and device type before contacting customer support for this update.
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Upon completing the software update, Hillrom will return your VS100 via 2-day shipping.ĭevice Hardware and Software Requirement: This software update is for vision screeners with a software version of 3.X or greater and Serial Number 15001 or greater. If a non-warranty repair is suggested, a Hillrom representative will contact you before performing any repairs.ĥ. Your VS100 will be updated in our repair facility. Using the provided shipping label, ship your VS100 to the address provided.Ĥ. Customer Support will provide an RMA number, anticipated turnaround time and a shipping label.ģ.
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This software update can be obtained free of charge, including shipping, by contacting customer support.
Welch Allyn Spot™ Vision Screener Software Update Version 3.1.01.00-A0002 | July 12, 2019.