Siemens SINUMERIK 840Di Function Manual page 1613

• If the setting data is not active, the behavior of the axis/spindle depends on the setting
• If the setting data is not active, the behavior of a geometry axis on which a frame with
"Revolutional feedrate active" DB31, ... DBX62.2
A programmed, active revolutional feedrate (G95) is displayed using this interface signal.
Alarms
• If no F value is programmed, alarm 10860 "No feedrate programmed" is output.
• If a negative path velocity is programmed, alarm 14800 "Programmed path velocity
• If a revolutional feedrate (G95) is programmed but no master spindle has been defined,
2.1.3 Type of feedrate G96, G961, G97, G971
Constant cutting rate (G96, G961)
The constant cutting rate is used on turning machines to keep the cutting conditions
constant, independently of the work diameter of the workpiece. This allows the tool to be
operated in the optimum cutting performance range and therefore increases its service life.
Selection of G96, G961:
When programming G96, G961, the corresponding S value is interpreted as the cutting rate
in m/min or ft/min along the transverse axis. If the workpiece diameter decreases during
machining, the speed is increased until the constant cutting speed is reached.
When G96,G961 is first selected in the part program, a constant cutting rate must be
entered in mm/min or ft/min. When the command is reselected, a new cutting rate may be
entered.
With G96, the control system will automatically switch to revolutional feedrate
(as with G95), i.e., the programmed feedrate F is interpreted in mm/rev or inch/rev.
When programming G961, linear feedrate is selected automatically (as with G94). A
programmed feedrate F is interpreted in mm/min or inch/min.
Feeds (V1)
Function Manual, 08/2005 Edition, 6FC5397-0BP10-0BA0
data:
SD43300 ASSIGN_FEED_PER_REV_SOURCE
(revolutional feedrate for positioning axes/spindles).
rotation is effective depends on the channel-specific setting data:
SD42600 JOG_FEED_PER_REV_SOURCE
(in JOG mode, revolutional feedrate for geometry axes on which a frame with rotation
acts).
The alarm is not generated with G0 blocks.
smaller than or equal to zero" is output.
alarm 10810 "No master spindle defined" is output.
Detailed Description
2.1 Path feedrate F
2-5