Special Functions; Constant Cutting Rate: G96, G97 - Siemens SINUMERIK 802D sl Programming And Operating Manual

10.5

Special functions

10.5.1

Constant cutting rate: G96, G97

Requirement
A controlled spindle must be present.
Functionality
With activated G96 function, the spindle speed is adapted to the currently machined
workpiece diameter (transverse axis) such that a programmed cutting rate S remains
constant on the tool edge:
Spindle speed times diameter = constant.
The S word is evaluated as the cutting rate as of the block with G96. G96 is modally effective
until cancellation by another G function of the group (G94, G95, G97).
Programming
G96 S... LIMS=... F...
G97
S
LIMS=
F
Remark:
If G94 instead of G95 was active before, a new appropriate F value must be written!
Rapid traverse
With rapid traverse G0, there is no change in speed.
Exception: If the contour is approached at rapid traverse and the next block contains an
interpolation type G1 or G2, G3, CIP, CT (contour block), then the speed for the contour
block is applied already in the approach block with G0.
Surface grinding
Programming and Operating Manual, 11/2012, 6FC5398-5CP10-3BA0
; Constant cutting speed ON
; Constant cutting speed OFF
; Cutting rate in m/min.
; Upper limit speed of the spindle with G96, G97
effective
; feedrate in mm/revolution –as for G95
Programming
10.5 Special functions
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