The pocket entry is a helix of 1 mm diameter larger than the tool. The tool screams on entry and the bottom of the helix is a rough spot. The rest of the pocket is fine. The CAM default helix was used.
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A helix that leaves almost no radial room loads the center of the end mill. Open the helix or use a linear ramp the tool can cut with its periphery. Center-cutting is not free on every carbide mill.
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The rough spot at the bottom is the helix dying in one place. Enter, then move off that point before you finish the floor.
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Defaults are for a generic tool. A 12 mm mill and a 3 mm mill do not share a helix.
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Questions and answers were written on this account when they were published.
