Siemens SINUMERIK 840Di sl Programming Manual page 484

Tables
12.3 List of G functions/preparatory functions
G952
10. Freeze revolutional feedrate and const. cutting rate or spindle speed
G962 11. Linear or revolutional feedrate and constant cutting rate
G972 12. Freeze linear or revolutional feedrate and constant spindle speed
G973 13 Revolutional feedrate without spindle speed limiting
(G97 without LIMS for ISO mode
G963 Reserved
Group 16: Feedrate override on inside and outside curvature
Name No. Meaning
CFC 1. Constant feed at contour
CFTCP 2. Constant feed in tool center point
(center-point path)
CFIN 3. Constant feed at internal radius, acceleration at external radius
Group 17: Approach and retraction response, tool offset
Name No. Meaning
NORM 1. Normal position at start and end points
KONT 2. Travel around contour at start and end points
KONTT 3. Insert polynominal with constant tangent (approach/retract)
KONTC 4. Insert polynominal with constant curvature (approach/retract)
Group 18: Corner behavior, tool offset
Name No. Meaning
G450 1. Transition circle
(tool travels round workpiece corners on a circular path)
G451 2. Intersection of equidistant paths
(tool backs off from the workpiece corner)
Group 19: Curve transition at beginning of spline
Name No. Meaning
BNAT 1. Begin natural: natural transition to first spline block
BTAN 2. Begin tangential: tangential transition to first spline block
BAUTO 3. Begin not a node: (no node) Start is determined by the position of the
1st point
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Programming Manual, 11/2006, 6FC5398-1BP10-2BA0
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Fundamentals