Velocities - Siemens SINUMERIK 840Di Manual

10 NC Start-Up with HMI Advanced
10.3 System data
Machine data
Table 10-12 Cycle times: Machine data
Number
General ($MN_ ...)
10050 SYSCLOCK_CYCLE_TIME
10060 POSCTRL_SYSCLOCK_TIME_RA TIO
10062 POSCTRL_CYCLE_DELA Y
10070 IPO_SYSCLOCK_TIME_RA TIO
!
10.3.9

Velocities

Max. axis velocity
or spindle speed
Max. progr.
tool path velocity
Max. tool path
velocity
Upper limit
10-294
Identifier
System clock cycle/only display data; is always
equal to the equidistant PROFIBUS DP cycle.
Note: with 840Di, only for display!
Factor for the position control cycle/is set fixed to
the factor 1.
Note: is not displayed with the 840Di
Position control cycle offset
Factor for the interpolator cycle/can be freely se-
lected in integer multiples.
Caution
If you have changed the time cycles, check that the operating response of the
control is correct in all operating modes before ending the start-up process.
Note
The smaller the cycle times (PROFIBUS DP cycle) are selected, the higher is
the control quality of the drive and the surface finish of the workpiece.
The maximum possible axis velocities and spindle speeds depend on the ma-
chine design, drive dynamics and the encoder limit frequency of the individual
drives.
The maximum programmable tool path velocity results from the maximum axis
velocities of the axes involved in the path programmed.
The maximum tool path velocity at which traversing is possible within a parts
program block results as follows:
progr. path length in parts program [mm or degrees]
+
V
max
To guarantee that parts program blocks are executed continuously (control mar-
gin), the NC limits the tool path velocity within a parts program block to 90% of
the max. possible tool path velocity as follows:
Name/remarks
IPO cycle [secs]
 Siemens AG, 2003. All rights reserved
SINUMERIK 840Di Manual (HBI) – 06.03 Edition
06.03
Ref.