Siemens SINUMERIK 828D Programming Manual page 105

Deactivating the constant cutting rate (G97/G971/G973)
After
not specify a new spindle speed, the last speed set with
The
programmed
G97
G95
Using
limitation.
Note
The transverse axis must be defined in machine data.
Rapid traverse G0
With rapid traverse
Exception:
If the contour is approached in rapid traverse and the next NC block contains a
path command, the speed is adjusted in the
Other reference axis for G96/G961/G962
If any of the G96/G961/G962 functions are active,
geometry axis as a reference axis. If the reference axis changes, which will in turn affect the
TCP (tool center point) reference position for the constant cutting rate, the resulting spindle
speed will be reached via the set braking or acceleration ramp.
Axis replacement of the assigned channel axis
The reference axis property for G96/G961/G962 is always assigned to a geometry axis. In
the event of an axis exchange involving the assigned channel axis, the reference axis
property for G96/G961/G962 is retained in the old channel.
A geometry axis exchange will not affect how the geometry axis is assigned to the constant
cutting rate. If the TCP reference position for G96/G961/G962 is affected by a geometry axis
exchange, the spindle will reach the new speed via a ramp.
If no new channel axis is assigned as a result of a geometry axis exchange (e.g.
the spindle speed will be frozen in accordance with
Examples for geometry axis exchange with assignments of the reference axis:
Program code
N05 G95 F0.1
N10 GEOAX(1, X1)
N20 SCC[X]
N30 GEOAX(1, X2)
N40 G96 M3 S20
Fundamentals
Programming Manual, 07/2010, 6FC5398-1BP40-0BA0
6.3 Constant cutting rate (G96/G961/G962, G97/G971/G972, G973, LIMS, SCC)
, the control interprets an S value as a spindle speed in rpm again. If you do
G97/G971
function can also be deactivated with
G96/G961
is used for subsequent machining operations.
S...
can be programmed without
; can also be programmed.
LIMS
, the constant cutting rate can be deactivated without activating a spindle speed
G973
, there is no change in speed.
G0
Comment
; Channel axis X1 becomes first geometry axis.
; First geometry axis (X) becomes reference axis for
; Channel axis X2 becomes first geometry axis.
; Reference axis for G96 is channel axis X2.
beforehand. The function then has the same effect as
G96
approach block for the next path command.
G0
G96/G961/G962.
is retained.
G96/G961
or . In this case, the last speed
G94 G95
can be used to assign any
SCC[<axis>]
.
G97
Spindle motion
/ / /etc.
G1 G2 G3
),
GEOAX(0,X)
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