Constant Cutting Rate: G96 - Siemens SINUMERIK 802D sl Function Manual

Transverse Axes (P1)

16.3 Constant cutting rate: G96

Conversion of diameter values to internal radius values
With diameter programming active, the internal radius values are converted for the
transverse axis (i.e. the programmed values are halved):
● Programmed end positions
● Absolute interpolation parameters (e.g. I, J, K) for G2/G3 programming. Absolute
Conversion of internal radius values to diameter values
For active diameter programming the measurement results when measuring in the WCS are
converted for the transverse axis with the "MEAS", "MEASW" functions (i.e. the internal
radius values are doubled) and stored.
For measurement or reading in the MCS the calculated values are stored as radius values.
16.3 Constant cutting rate: G96
Functionality
Requirement: A controlled spindle must be present.
With activated G96 function, the spindle speed is adapted to the currently machined
workpiece diameter (position of the transverse axis = geometry axis X) 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
Switchgear protection
LIMS=
F
Reference:
/BP_/ Operation and Programming
304
interpolation parameters are in relation to the coordinate origin of the WCS. Interpolation
parameters programmed relatively are not converted.
References:
"Operation and Programming"
Constant cutting speed ON
Constant cutting speed OFF
S Cutting rate, unit m/min
Upper limit speed of the spindle with G96, G97 effective
Feedrate in mm/revolution – as for G95
Turning, Milling, Nibbling
Function Manual, 11/2012, 6FC5397-1CP10-5BA0