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10.04 Programming with ShopMill
3.5 Contour millin
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ï›™ Siemens AG, 2004. All rights reserved
SINUMERIK 840D/840Di/810D Operation/Programming ShopMill (BAS) – 10.04 Edition 3-203
3.5.6 Path milling
You can mill along any contour you have programmed with the "Path
milling" function. The function operates with cutter radius
compensation. Machining can be performed in either direction, i.e. in
the direction of the programmed contour or in the opposite direction.
The contour does not have to be closed. You can perform any of the
following operations:
• Inside or outside machining (on left or right of the contour).
• Machining along center-point path
For machining in the opposite direction, contours must not consist of
more than 170 contour elements (incl. chamfers/radii).
Special aspects (except for feed values) of free G code input are
ignored during path milling in the opposite direction to the contour.
Path
milling >
îš¾ Press the "Cont. mill." and "Path milling" softkeys.
Path milling on right or left
of the contour
A programmed contour can be machined with the cutter radius on the
right or left. You can also select various modes and strategies of
approach and retraction from the contour.
Approach/retraction
mode
The tool can approach or retract from the contour along a quadrant,
semi-circle or straight line.
• With a quadrant or semi-circle approach path, you must enter the
current center point path.
• With a straight line, you must specify the distance between the
cutter outer edge and the contour start or end point.
You can also program a mixture of modes, e.g. approach along
quadrant, retract along semi-circle.
L1/L2
R1/R2
R1/R2
Approach and retraction along straight line, quadrant and semi-circle; (L1=approach
length, L2=retract length, R1=approach radius, R2=retract radius)
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