Angular Measurements and Circular division-Calibration of Polygons
Posted by mechlook info on November 14th, 2011 12:43 AM | No Comment
Before using any precision polygon, it is usually calibrated by using two auto-collimators in order to know the errors. The two auto-collimators are set up by keeping angle between them equal to the nominal angle between adjacent faces of the ...
Angular Measurements and Circular division-Calibration of Divided Circle
Posted by mechlook info on November 14th, 2011 12:43 AM | No Comment
Calibration of divided circle, compared to linear line standard is simply and easy since it involves no arbitrary standard. It involves two micrometer microscopes fixed at some suitable angular relationship to each other. The divided circle is mounted on a ...
Angular Measurements and Circular division-Spirit level
Posted by mechlook info on November 14th, 2011 12:20 AM | No Comment
It is generally thought that spirit level is used only for the static levelling of the machinery and other equipment. But calibrated spirit level is an angular measuring device of great precision. Spirit level is nothing but simply a glass ...
Angular Measurements and Circular division-Divided Circles
Posted by mechlook info on November 13th, 2011 08:50 PM | No Comment
These correspond to the line standards in length measurement. The lines are ruled out into glass discs defining the angular positions.