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Bolt Circle Coordinates for CNC Drilling

Generate and verify bolt-circle X and Y coordinates before using a drilling pattern in a CNC program.

A bolt circle can be represented by radius and angle. Each point is converted to X and Y with cosine and sine, then stepped around the circle by the required angular increment.

Always confirm the circle center, starting angle, direction, work offset, and machine orientation. A mathematically correct coordinate list can still be wrong for the selected machine datum.