Open this dialog by clicking the Bottom Finishing button on the Stepover tab of Milling Machining Attributes.
Finish bottom — By default, the bottom of a feature is not machined during the Finish pass. Enable this option to finish the bottom of the feature with a flat endmill, up to the Bottom Radius, if the feature has one. You can enter a positive or negative value.
Wall pass — Enable this option to finish the bottom of the feature up to the Finish allowance on the wall, then finish the walls in a separate pass.
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Finish allowance
Wall pass
Floor pass
If Wall pass is disabled, then the floor is finished all the way out to the wall in a single pass. The wall is not finished separately.
For OD/ID grooves if this attribute is selected, then the bottom is finished separately from the walls of the groove.
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Wall finish allowance
Stepover — Select the stepover type for finishing the bottom of a milled feature.
Spiral % — This is the percentage of tool diameter to use for radial depth of cut for finishing the bottom of a milled feature when using the spiral method.
Zigzag % — This is the percentage of tool diameter to use for radial depth of cut for finishing the bottom of a milled feature when using the zigzag method.