Siemens SINUMERIK 828D Programming Manual page 311

Significance
G140
G141
G142
G143
G147
G148
G247
G248
G347
G348
G340
G341
DISR
DISCL
FAD
Fundamentals
Programming Manual, 07/2010, 6FC5398-1BP40-0BA0
: Approach and retraction direction dependent on 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 dependent on the relative position of the
start or end point 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 lines (G147/G148)
Distance of the milling tool edge to the starting point of the contour
Approach and retraction along circles (G247, G347/G248, G348)
Radius of the tool center path
Notice: For REPOS with a semicircle, DISR is the circle diameter
: DISCL=... distance of the end point of the
fast feed movement to the machining plane
DISCL=AC(...) specification of the absolute position of the end point of the
fast feed movement
: Speed of the slow feed movement
FAD=... the programmed value is applied corresponding to
the G code of group 15 (feedrate; G93, G94, etc.)
FAD=PM(...) the programmed value is interpreted irrespective of the active G
code, group 15 as linear feedrate (as G94)
FAD=PR(...) the programmed value is interpreted irrespective of the active G
code, group 15 as revolutional feedrate (as G95).
Tool radius compensation
10.4 Smooth approach and retraction
311