Question

Inspection of machine parts using the concept of shadow projection

Answer 1

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Answer 2

An optical comparator (often called just a comparator in context) or profile projector is a device that applies the principles of opticsto the inspection of manufactured parts. In a comparator, the magnified silhouette of a part is projected upon the screen, and the dimensions and geometry of the part are measured against prescribed limits. It is a useful item in a small parts machine shop or production line for the quality controlinspection .

Complete RRB JE following syllabus is covered in these videos:-

• Metrology : Linear measurement – Slip gauges and dial indicators, angle measurements, bevel protractor, sine bar, angle slip gauges, comparators (a) mechanical (b) electrical (c) optical (d) pneumatic. Measurement of surface roughness; methods of measurements by comparison, tracer instruments and by interferometry, collimators, measuring microscope, interferometer, inspection of machine parts using the concepts of shadow projection and profile projection.