An arc angle, or central angle, is the angle produced by an arc's radii intersecting at the centre of its circle:
By specifying an arc angle of 20, PowerMill converts all the partial holes to (complete) holes:
By specifying an arc angle of 100, PowerMill converts eight of the twelve partial holes to (complete) holes:
To identify the shallow angle, you need to specify an arc angle of 20 and a Tolerance of 0.01:
