comparators – Download as PDF File .pdf), Text File .txt) or view Calibration Comparators • Brookes Level Comparators • Eden-Rolt Millionth Comparators. Uses of Eden-Rolt comparator is specified in this section. Example for Mechanical comparators are Dial gauge, Read comparator, Johansson Mikrokator, Sigma comparator, Eden – Rolt millionth comparator etc.
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The amplified mechanical movement is further amplified by a simple optical system involving the projection of an image.
Thus with movement of scale the image can be measured with reference comparatr the fixed line. The brackets are kept in alignment by a keyway and a spline, and carry an optical measuring head and a tailstock respectively. The extreme sensitivity of this instrument necessitates special precautions in its operation to avoid temperature effects.
COMPARATORS Introduction: – ppt video online download
Optical magnification provides high degree of measuring precision Mp to reduction of moving members and better milliontj resistance qualities. There are other attachments also on the base for various works.
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Related Questions For everyone who knows Eden? Advantages of Mechanical Comparators Mechanical comparators are usually cheaper when compared to other amplifying devices.
It is very useful for measuring the internal and external dimensions edsn cylindrical gauges, screw gauges and thickness gauges. A vertically adjustable plunger with both titling and lengthwise movements is also housed in the base.
The eye placed near the eye-piece views the image of a small scale engraved on glass after reflection from the plunger actuated mirror and the prism in the plan view in Millionnth.
The division of the scale image opposite the index line indicates the amount of movement of contact plunger.
Mechanical Optical Comparators (Metrology)
Registration Forgot your password? Principle of Optical Comparator. Any wear, play, backlash milliobth dimensional faults in the mechanical devices used will also be magnified.
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The optical system of this instrument involves double reflection of light and thus gives higher degree of magnification. The whole system could be explained diagrammatically by Fig.
Becoming a high school teacher in California? The ends of fixed and moving strips through two pointer cmoparator are connected to a pointer arm which carries at its end a ring across which is stretched a spider web. In normal back reflection type there are two miplionth images, one each from front and back.
This utilises a plunger tilted mirror, objective lens, prism and observing eye-piece to provide a high degree of magnification. Thus the reflected image is not well defined one, as one bright and other blurred image are observed. The second objective lens brings the reflected beam from the comaprator mirror to a focus at a transparent graticule containing a precise scale which is viewed by the eye-piece.
Thus it is obvious that optical comparators are capable of giving a high degree of measuring precision owing to high magnification and the reduction of moving members to minimum. We think you have liked this presentation.
Auth with social network: Are you sure you want to delete this answer? We will need more information to help you. The image of the scale and the index line could also be viewed through a projection system.
Eden rolt millionth comparators?
The projected image comparato index line on the graticule can be adjusted by means of screw in order to set the zero. It can measure very accurately with great precision in horizontal direction. Mechanical Optical Comparators Metrology. If you wish to download it, please recommend it to your friends in any social system.