9.12 Polygonal Side Milling
Polygonal side milling means a down cutting to designated depth move toward a polygon route.
Geometry
X CenterX |
The distance from the origin of workpiece to the center of the polygon in X direction. |
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Y CenterY |
The distance from the origin of workpiece to the center of the polygon in Y direction. |
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Z StartZ |
The distance from the origin of workpiece to the upper surface of removed area in Z direction. |
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N N-sided |
Number of sides. Range from 3 to 8. |
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C Circle |
In |
The reference circle is the incircle of this polygon, which means the reference circle is tangent to all sides of this polygon. |
Circum |
The reference circle is the circumcircle of this polygon, which means the reference circle passes through all vertices of this polygon. |
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R Radius |
Radius of reference circle. |
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D Depth |
Depth of removal. |
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A Rotate |
A counterclockwise rotation around the center with designated angle. |
Note 1: |
One vertex is on the positive direction of X axis while the rotating angle is 0. |
Note 2: |
The left graph below shows the Incircle of a polygon, and the right one shows Circumcircle. Here comes the equations when an N-sided polygon defined by In/Circumcircle with radius R.
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Manufacture
ToolNumber |
Order of desired tool in tool table. |
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SpindleRPM |
Rotating speed of spindle. |
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SpindleDir |
CW |
Spindle rotates in CW. |
CCW |
Spindle rotates in CCW. |
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H ZUpper |
Z axis would halt at this position which is related to StartZ before and after cutting. |
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C CutDir |
CW |
Direction of cutting route is CW. |
CCW |
Direction of cutting route is CCW. |
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M SideMode |
OutsideIn |
Cut along the outer side surface. |
InsideOut |
Cut along the inner side surface. |
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R RemovalW |
Width of removal. |
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K StepWidth |
Width per cut. Must less than the diameter of selected tool. Set in percentage of tool diameter. |
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Q StepDepth |
Depth per cut. Must less than or equal to Depth of geometry. |
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W FineWidth |
Width of fine cut. Set to 0 if none. Must less than or equal to StepWidth, tool radius and RemovalW. |
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D FineDepth |
Depth of fine cut. Set to 0 if none. Must less than or equal to StepDepth. |
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F Feedrate |
Feedrate of XY moving. (mm/min) |
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S ZDirFeed |
Feedrate of Z moving. (mm/min) |
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E FineFeed |
Feedrate of fine cut. (mm/min) |
Note 1: |
In this process, "K StepWidth" is defined as the step in distance on the vertex-to-vertex direction in order to avoid cutting residues. In below diagram, the dashed arrow is K. And the double arrow shows the edge-to-edge step in distance, which is "K × cos (π×(N-2)/2N)", of an N-sided polygon. |
Note 2: |
The entry point is defined by the geometry and the removal width. The first cutting would make the tool center moving along the edges of removal width. There is no limit for the removal width when SideMode is OutsideIn. Otherwise, the removal width must less than the distance from center to the geometric boundary when SideMode is InsideOut. |