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10-4-4. Precautions when Performing High-speed Bar Turning
Finish contour end point
In AP Mode IV, the portion beyond the Z-coordinate (X-coordinate in the transverse direction) of the
finish contour end point (final rough turning contour when stock removal is designated using the U or
W command) is not cut even when the blank material shape for that portion has been designated.
Portion not to be cut
10-4-5. How to Obtain the Infeed Starting Point
The infeed starting point in a high-speed bar turning cycle is determined by the following items:
Cs
: AP starting point
Lc
: LAP clearance amount
Bsp
: Finish contour start point (after the activation of tool nose radius compensation)
Cp
: Point of intersection between the blank material shape and the infeed line
Xp
: Point of intersection between the line segment Cs-Bsp and the infeed line
When tool nose radius compensation is not activated, the finish contour start point designated in
shape definition is taken as the finish contour start point Bsp.
The explanation that follows takes longitudinal cutting in the forward direction as an example.
Cs (Zs) ≥ Bsp (Z) + Lc
This is the normal positional relationship in bar turning.
•
X-coordinate of the infeed line > Bsp (X)
The infeed starting point is defined at "Cp (Z) + Lc, Cp (X)" which is distanced from point Cp by
the LAP clearance amount (Lc).
SECTION 8 LATHE AUTO-PROGRAMMING FUNCTION (LAP)
Portion to be cut
Blank material shape
Finish contour
The minimum Z-coordinate in the finish contour
5238-E P-211
LE33013R0301000240001
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