I am getting 2.5 mm variation in dia meter when I am making circle using G02/G03 circular interpolation . The dia increase on 45 degree on both side. The condition of maching as below:

Plane : X&W with G18

Feed rate : 800 mm/Min.

Pl. suggest me how to use circularity test in 840D and also other Test method.

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Split from circularity test 840D.