Tool orientation to the point that the tool
is parallel to the XY plane
Tool orientation change to maintain the tip in the most negative Z axis orientation
These options direct the shank orientation during the cut across a surface as described in the following:
Minimum Tilt
This option is used to maintain the tool tip in the most negative Z axis orientation. The tool shaft is not allowed to be oriented in a more negative Z axis orientation than the tip.
This type of cutting may cause the tool to pivot unpredictably if the part of the surface being cut is parallel to the XY plane. This occurs when the shank orientation is parallel to the XY plane. The cut may gouge the part in an attempt to maintain the tool tip in the most negative Z axis orientation.
In 4 Axis machining, the tool shank orientation is maintained by rotary axis rotation. Minimum Tilt, while available for 4 Axis Swarf, is a less desirable technique than in 5 Axis Swarf since Minimum Tilt requires the rotary axis to rotate 180° while moving along the linear axes. This may cause the tool to gouge the surface.
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Tool orientation to the point that the tool
is parallel to the XY plane |
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Tool orientation change to maintain the tip in the most negative Z axis orientation |
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Ruled
This causes the shank of the tool to be oriented parallel to the flow lines of the surface being cut with no regard to the true Z.