(English) This test determines the maximum deviation of the table surface during rotation due to any lack of parallelism in the table top and any irregularities in the rolling thrust bearing elements (if applicable). Continue reading →

(English) The flatness check determines the distance “t” between two parallel planes within which the surface lies. The surface must be flat or concave. Continue reading →

(English) To determine the deviation in parallelism of a point on the rotary surface and the bottom (seating) surface of the rotary table. Continue reading →

(English) The angular position deviations are determined by comparing the actual position of the rotary table with the nominal angles defined by a calibrated angle gauge. Continue reading →

(English) The Rotary Table on test is placed on a rigid and flat support surface with the Rotaryaxis in the vertical position. A precision sphere/hemi-sphere is placed and centred on the rotary axis at table top level. A high-resolution linear indicator is placed on the support surface close to the rotary table so that radial deviation measured at the apex of the sphere can be recorded over a minimum of two full revolutions of table. Continue reading →

(English) The Rotary Table on test is placed on a rigid and flat support surface with the rotary axis in the vertical position. A precision sphere/hemi-sphere is placed and centred on the rotary axis at table top level. A high-resolution linear indicator is placed on the support surface close to the rotary table so that axial deviation measured at the apex of the sphere can be recorded over a minimum of two full revolutions of the table. Continue reading →

(English) The rotary table on test is placed on a rigid and flat support surface with the rotary axis in the vertical position. A precision sphere/hemi-sphere is placed and centred on the rotary axis at table top level and a high-resolution linear indicator is placed on the support surface close to the rotary table so that radial deviation measured at the apex of the sphere can be recorded over a minimum of two full revolutions of the table (RRa).

The process is then repeated with the precision sphere/hemi-sphere placed and centred on the spacer at a known height (h) with the radial deviations measured at the apex of the sphere recorded over a minimum of two full revolutions of the table (RRb). Continue reading →

(English) The concentricity of centre bore error is the radial difference Fr between two concentric bores in which all measured points are contained. Continue reading →

(English) The unit to be measured is placed onto a granite surface table. A calibrated cylindrical square is used to reference an Indi-Square that in turn is used to measure the squareness of the table top surface to the reference surface. Continue reading →