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- Nov 17, 2017
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The concentricity gauge is a dial-like indicator where the dial is driven off a cam surface and lever.
Off of the lever is an arm that rotates around the surface (i.e., touching) being measured.
The other end is placed in the spindel.
You turn on the machine, the spindle rotates, and you adjust the x and y axis until the indicator hardly moves.
In the part above, the gauge is used twice, first to center the rotary table under the spindle, then to center the part on the rotary table also under the spindle. Once centered I offset in the long axis and then round and round she went until the outer diameter was appropriate.
I got both concentricities well under 0.000,5.
Off of the lever is an arm that rotates around the surface (i.e., touching) being measured.
The other end is placed in the spindel.
You turn on the machine, the spindle rotates, and you adjust the x and y axis until the indicator hardly moves.
In the part above, the gauge is used twice, first to center the rotary table under the spindle, then to center the part on the rotary table also under the spindle. Once centered I offset in the long axis and then round and round she went until the outer diameter was appropriate.
I got both concentricities well under 0.000,5.