Speed Monitoring - Siemens SINUMERIK 840D sl Function Manual

Grinding-specific tool offset and tool monitoring (W4)
18.5 Grinding-specific tool monitoring
18.5.3

Speed monitoring

Function
The speed monitor checks the grinding wheel peripheral speed (parameter $TC_TPG7) as
well as the maximum spindle speed (parameter $TC_TPG6).
The unit of measurement is:
● Grinding wheel peripheral speed m
● Spindle speed rev/min
Monitoring is cyclic. The value is always limited to the first limit value reached.
When does monitoring take place?
The speed setpoint is monitored against the speed limitation cyclically, allowing for the
spindle override.
When is the speed limit value recalculated?
The speed limit value is recalculated:
● when the monitoring function is selected,
● when the online offset values (wear parameters) are altered.
Monitor reactions
The system reacts as follows when the speed monitor responds:
● The speed is restricted to the limit value
● Interface signal:
DB31, ... DBX83.6 = 1 ⇒ Speed monitoring limit reached
DB31, ... DBX83.6 = 0 ⇒ Speed monitoring limit not reached
Note
No error reaction is initiated internally in the control system.
990
and
DB31, ... DBX83.6 (speed monitoring)
is output.
s
-1
*
Function Manual, 01/2008, 6FC5397-1BP10-3BA0
Extended Functions