Maximum Spindle Speed - Siemens SINUMERIK 828D Function Manual

16.8.6

Maximum spindle speed

Maximum permissible spindle speed
The absolute speed upper limit, which the spindle must not exceed (the spindle chuck with the workpiece or the
tool), is configured in machine data:
MD35100 $MA_SPIND_VELO_LIMIT (maximum spindle speed)
A change to the set value becomes effective after an NC reset.
Note
Machine manufacturer
Before reducing the value set in MD35100, the spindle involved should be stopped.
Otherwise, Alarm 22100 (refer below) can occur, as the monitoring value is correspondingly
reduced. Stopping especially applies to spindles that as a result of the setting in MD35040
SPIND_ACTIVE_AFTER_RESET, are active beyond an NC reset.
Monitoring
The maximum permissible spindle speed is monitored on the actual value side.
Error case
If the actual speed exceeds the maximum permissible spindle speed by more than the configured spindle speed
tolerance (MD35150 $MA_SPIND_DES_VELO_TOL), then the following NC/PLC interface signal is set:
DB31, ... DBX83.0 (speed limit exceeded)
Further, the following alarm is output:
Alarm 22100 "Chuck speed exceeded"
All axes and spindles of the channel are braked (precondition: encoder is still functioning).
Additional speed limiting by the user
Using the following setting data, the machine operator also has the option of setting a maximum permissible
spindle speed, e.g. to adapt the upper speed limit to the maximum speed of the currently mounted chuck after a
chuck change:
SD43235 $SA_SPIND_USER_VELO_LIMIT (maximum spindle speed)
A change to the set value becomes effective immediately. The control limits an excessive spindle speed setpoint
to this value.
Note
As standard setting, SD43235 has a speed limit of 10,000 rpm. For a software upgrade and
spindle speeds above 10,000 rpm, if required, SD43235 must be increased.
Basic Functions
Function Manual, 09/2011, 6FC5397-0BP40-2BA0
S1: Spindles
16.8 Spindle monitoring
1347