Siemens SINUMERIK 828D Programming Manual page 104

Spindle motion
6.3 Constant cutting rate (G96/G961/G962, G97/G971/G972, G973, LIMS, SCC)
Further information
Calculation of the spindle speed
The ENS position of the face axis (radius) is the basis for calculating the spindle speed from
the programmed cutting rate.
Note
Frames between WCS and SZS (e.g. programmable frames such as SCALE, TRANS or
ROT) are taken into account in the calculation of the spindle speed and can bring about a
change in speed (for example, if there is a change in the effective diameter in the case of
SCALE).
Speed limitation LIMS
If a workpiece that varies greatly in diameter needs to be machined, it is advisable to specify
a speed limit for the spindle with
high speeds with small diameters.
LIMS
Note
On loading the block into the main run, all programmed values are transferred into the
setting data.
104
is not applied when
G971
(maximum spindle speed). This prevents excessively
LIMS
is only applied when
LIMS
is selected.
Programming Manual, 07/2010, 6FC5398-1BP40-0BA0
, , and are active.
G96 G961 G97
Fundamentals