Siemens SINUMERIK 840D sl Programming Manual page 272

Fundamentals
2.10 Tool radius compensation
When the function is activated, the control calculates the intermediate points in such a way that
the transition to the following block (or the transition from previous block during retraction) is
performed in accordance with the specified parameters.
The approach movement consists of a maximum of four sub-movements. The starting point of
the movement is called P
P and P
2
points P
conditions. On retraction, the points are traversed in the reverse direction, i.e. starting at P
ending at P
Syntax
Smooth approach:
● With a straight line:
G147 G340/G341 ... DISR=..., DISCL=..., DISRP=... FAD=...
● With a quadrant/semicircle:
G247/G347 G340/G341 G140/G141/G142/G143 ... DISR=... DISCL=...
DISRP=... FAD=...
Smooth retraction:
● With a straight line:
G148 G340/G341 ... DISR=..., DISCL=..., DISRP=... FAD=...
● With a quadrant/semicircle:
G248/G348 G340/G341 G140/G141/G142/G143 ... DISR=... DISCL=...
DISRP=... FAD=...
Meaning
G147:
G148:
G247:
G248:
G347:
G348:
G340:
G341:
G140:
G141:
G142:
G143:
272
, the end point P
0
can be between these points. Points P
3
and P can be omitted, according to the parameters defined and the geometrical
1 2
.
0
Approach with a straight line
Retraction with a straight line
Approach with a quadrant
Retraction with a quadrant
Approach with a semicircle
Retraction with a semicircle
Approach and retraction in space (default setting)
Approach and retraction in the plane
Approach and retraction direction dependent on the current compensation side
(default setting)
Approach from the left or retraction to the left
Approach from the right or retraction to the right
Approach and retraction direction dependent on the relative position of the start
or end point to the tangent direction
in the following. Up to three intermediate points P
4
, P and P are always defined. Intermediate
0 3 4
Programming Manual, 12/2019, 6FC5398-2EP40-0BA0
,
1
and
4
NC programming