COMPARATORCOMPARATORSS

NEED FOR A COMPARATORNEED FOR A COMPARATOR

(i) In mass production, where components are to be checked at a very fast rate.

(ii) As laboratory standards from which working or inspection gauges are set and correlated.

(iii) For inspecting newly purchased gauges.(iv) Attached with some machines, comparators

can be used as working gauges to prevent work spoilage and to maintain required tolerances at all stages of manufacturing.

(v) In selective assembly of parts, where parts are graded in three or more groups depending upon their tolerances.

TYPES OF TYPES OF COMPARATORCOMPARATOR

(1) Mechanical comparators (2) Optical comparators(3) Electrical and Electronic comparators (4) Pneumatic comparators(5) Fluid displacement comparators (6) Projection comparators(7) Multi-check comparators (8) Automatic gauging machines

MECHANICAL MECHANICAL COMPARATORCOMPARATOR

• REEDS TYPE COMPARATOR• DIAL INDICATOR • Johansson 'Mikrokator‘ • Sigma Comparator

Rack and Rack and pinionpinion Cam and gear train Lever with toothed gear.

Compound levers Twisted taut strip Lever combined

Systems of Displacement Amplification used in Mechanical Comparators

REEDS TYPE REEDS TYPE COMPARATORCOMPARATOR

DIAL INDICATOR DIAL INDICATOR

Johansson Johansson ‘Mikrokator’‘Mikrokator’

Sigma Sigma ComparatorComparator

OPTICAL OPTICAL COMPARATORCOMPARATOR

• PRINCIPLE

• MECHANICAL OPTICAL TYPE• ZEISS ULTRA OPTIMETER

PRINCIPLE PRINCIPLE

MECHANICAL MECHANICAL OPTICAL TYPE OPTICAL TYPE COMPARATORCOMPARATOR

ZEISS ULTRA-ZEISS ULTRA-OPTIMETEROPTIMETER

ELECTRICAL AND ELECTRICAL AND ELECTRONIC ELECTRONIC

COMPARATORCOMPARATOR

• PRINCIPLE• LINEAR VARIABLE DIFFERENTIAL TRANSFORMER(LVDT)

PRINCIPLEPRINCIPLE

LINEAR VARIABLE DIFFERENTIAL LINEAR VARIABLE DIFFERENTIAL

TRANSFORMER(LVDT)TRANSFORMER(LVDT)

PNEUMATIC PNEUMATIC COMPARATORCOMPARATOR

• PHYSICAL PHENOMENON• SYSTEMS OF PNEUMATIC

COMPARATORS• SOLEX PNEUMATIC

PHYSICAL PHYSICAL PHENOMENONPHENOMENON

SYSTEMS OF PNEUMATIC SYSTEMS OF PNEUMATIC

COMPARATORCOMPARATOR

FLOW OR VELOCITY TYPE FLOW OR VELOCITY TYPE

SYSTEMS OF PNEUMATIC SYSTEMS OF PNEUMATIC COMPARATORCOMPARATOR

BACK PRESSURE TYPE PNEUMATIC COMPARATOR BACK PRESSURE TYPE PNEUMATIC COMPARATOR

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