Introduction to Comparators
Posted by mechlook info on January 18th, 2012 08:25 PM | No Comment
A comparators works on relative measurements, i.e. to say, it gives only dimensional differences in relation to a basic dimension. So a comparator has to compare the unknown dimensions of a part with some standard or master setting which represents ...
Characteristics of Comparators
Posted by mechlook info on January 18th, 2012 08:24 PM | No Comment
Before we discuss the various types of comparators, let us first look into various fundamental requirements which every comparator must fulfil. These are as follows :
(i) The instrument must be of robust design and construction so as to withstand the ...
Uses of Comparators
Posted by mechlook info on January 18th, 2012 08:24 PM | No Comment
The various ways in which the comparators can be used are as follows :
(1) In mass production, where components are to be checked at a very fast rate.
(2) As laboratory standards from which working or inspection, gauges are set and ...
Mechanical Comparators
Posted by mechlook info on January 17th, 2012 08:33 PM | No Comment
In these comparators, magnification is obtained by mechanical linkages and other mechanical devices.
1. Systems of Displacement Amplification used in Mechanical Comparators
(i) Rack and Pinion. In it the measuring spindle integral with a rack, engages a pinion which amplifies the movement ...
Advantages and disadvantages of Various Types of Comparators
Posted by mechlook info on January 17th, 2012 08:33 PM | No Comment
Advantages of Mechanical Comparators
(i) These are usually cheaper in comparison to other devices of amplifying.
(ii) These do not require any external supply such as electricity or air and as such the variations in outside supplies do not affect the accuracy.
(iii) ...
Mechanical Optical Comparators
Posted by mechlook info on January 17th, 2012 08:32 PM | 2 Comments
In mechanical optical comparators small displacements of the measuring plunger are amplified first by a mechanical system consisting of pivoted levers. The amplified mechanical movement is further amplified by a simple optical system involving the projection of an image. The ...
Multicheck Comparators
Posted by mechlook info on January 17th, 2012 08:31 PM | No Comment
Now-a-days modern trend in comparison is towards the inspection of all dimensions at the same time, as it is economical procedure. It is particularly desired where various dimensions have some relationship with each other, e.g., diameter and concentricity measurement. This ...