Siemens SINUMERIK 840D Operation/Programming Manual page 194

3
Programming with ShopMill
3.5 Contour milling
Machining direction
Outside contour
Required direction of
rotation for machining
Down-cut
Up-cut
Inside contour
Required direction of
rotation for machining
Down-cut
Up-cut
Contour transition
elements
Additional commands
3-194
In the case of path milling, the contour is always machined in the
programmed direction. By programming the contour in the clockwise
direction or counterclockwise direction, you can determine whether
the contour is machined with down-cut milling or up-cut milling (see
the following table).
CW spindle rotation
Programming in clockwise direction
CCW cutter radius compensation
Programming in counterclockwise
direction, CW cutter radius compensation
CW spindle rotation
Programming in counterclockwise
direction, CCW cutter radius
compensation
Programming in clockwise direction
CW cutter radius compensation
As a transition between two contour elements, you can choose a
radius or a chamfer. The transition is always appended to the end of a
contour element. The contour transition is selected in the
parameterization screen form of the contour element.
You can use a contour transition element whenever there is an
intersection between two successive elements which can be
calculated from input values. Otherwise you must use the
"Straight/Circle" contour elements.
That means that for a closed counter, you can also program a
transition element from the last to the first element of the contour. The
contour starting point is outside the contour after you have
programmed the transition.
For each contour element, you can enter any additional commands in
G code format. For example, you can program "G9" deceleration,
exact stop for the circle contour element.
You can enter the additional commands (max. 40 characters) in the
extended parameterization screen form ("All parameters" softkey).
CCW spindle rotation
Programming in counterclockwise
direction, CW cutter radius compensation
Programming in clockwise direction
CCW cutter radius compensation
CCW spindle rotation
Programming in clockwise direction
CW cutter radius compensation
Programming in counterclockwise
direction, CCW cutter radius
compensation
SINUMERIK 840D/840Di/810D Operation/Programming ShopMill (BAS) – 10.04 Edition
3
10.04
 Siemens AG, 2004. All rights reserved