Constant Surface Speed Control (G96, G97) - Siemens Sinumerik 802D sl Programming Manual

04.07
S Spindle speed override is possible for the specified S code.
S For the machine that has the gearbox with which gear range can be changed by
specifying an M code, specify the M code to select an appropriate gear range
before specifying an S code. For the number of gear ranges and the available
spindle speed range in the individual gear ranges, refer to the manuals publis-
hed by the machine tool builder.
3.5.2

Constant surface speed control (G96, G97)

The G codes indicated in table 3--7 are used for the constant surface speed control
function. G96 and G97 are modal G code of 02 group.
Table 3-8
G code
G96
G97
Constant surface speed control ON (G96)
With the commands of "G96 S... (M03) ;", the workpiece surface speed is desig-
nated by a maximum 5-digit number following address S. The unit used for speci-
fying the surface speed is indicated in Table 3-9.
Table 3-9
mm
inch
In the constant surface speed control mode, the NC assumes the present value of
the X-axis as the workpiece diameter and calculates the spindle speed every
32 msec so that the specified surface speed is maintained. The specified surface
speed can be changed by specifying a required S code in the following blocks.
© SIEMENS AG 2007 All rights reserved
SINUMERIK 802D sl/840D sl840D/840Di sl/840Di/810D ISO Turning - - 04.07 Edition
G codes for constant surface speed control
Constant surface speed control ON
Constant surface speed control cancel
Units of surface speed designation
m/min
ft/min
Movement Control Commands
3.5 Spindle function (S function)
Function
Unit
Group
02
02
3-81