Siemens SINUMERIK 828D Programming Manual page 322

Tool radius compensation
10.4 Smooth approach and retraction
Syntax
G460
G461
G462
Significance
G460
G461
G462
Note
The approach behavior is symmetrical to the retraction behavior.
The approach/retraction behavior is determined by the state of the G command in the
approach/retraction block. The approach behavior can therefore be set independently of the
retraction behavior.
Examples
Example 1: Retraction behavior with G460
The following example describes only the situation for deactivation of tool radius
compensation: The behavior for approach is exactly the same.
Program code
G42 D1 T1
...
G1 X110 Y0
N10 X0
N20 Y10
N30 G40 X50 Y50
322
: As previously (activation of the collision detection for the approach and retraction
block)
: Insertion of a circle in the TRC block, if it is not possible to have an intersection
whose center point is in the end point of the uncorrected block, and whose radius
is the same as the tool radius.
Up to the intersection, machining is performed with an auxiliary circle around the
contour end point (i.e. up to the end of the contour).
: Insertion of a circle in the TRC block, if it is not possible to have an intersection;
the block is extended by its end tangent (default setting).
Machining is performed up to the extension of the last contour element (i.e. until
shortly before the end of the contour).
Comment
; Tool radius 20 mm
Programming Manual, 07/2010, 6FC5398-1BP40-0BA0
Fundamentals