Siemens SINUMERIK 840DE Programming Manual page 340

Tool offsets
8.11 Smooth approach and retraction
Parameters
G140
G141
G142
G143
G147
G148
G247
G248
G347
G348
G340
G341
DISR
DISCL
FAD
8-44
Approach and retraction direction independent of the
current compensation side (basic setting)
Approach from the left or retraction to the left
Approach from the right or retraction to the right
Approach and retraction direction depends on the relative
position of the start and end point with respect to the
tangent direction
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 (basic setting)
Approach and retraction in the plane
Approach and retraction with straight line (G147/G148)
Distance from the mill edge to the start point of the
contour
Approach and retraction with circles (G247, G347/G248,
G348)
Radius of the tool center point path
Caution: In the case of REPOS with a semicircle, DISR is
the diameter of the circle
DISCL=... Distance from the end point of the
fast infeed motion to the machining plane
DISCL=AC(...) Specifies the absolute position of the end
point of the
fast infeed motion
Speed of the slow infeed motion
FAD=... the programmed value applies according to the
G code of group 15 (feedrate; G93, G94, etc.)
FAD=PM(...) the programmed value is interpreted as a
linear feedrate (as G94), independently of the active G
code, group 15
FAD=PR(...) the programmed value is interpreted as a
revolutional feedrate (as G95), independently of the
active G code, group 15.
Programming Manual, 10.2004 Edition, 6FC5 298-7AB00-0BP1
Fundamentals