S1: Spindles
16.2 Operating modes
Basic Functions
1258 Function Manual, 09/2011, 6FC5397-0BP40-2BA0
Independent spindle reset
The spindle response after a reset or the end of the program (M2, M30) is set with the machine data:
MD35040 $MA_SPIND_ACTIVE_AFTER_RESET (individual spindle reset)
If prior to reset or end of program the constant cutting rate (G96, G961) is active, the current spindle speed (in
relation to 100% spindle override) is internally accepted as the spindle speed last programmed.
The spindle can only be stopped with the NC/PLC interface signal:
DB31, ... DBX2.2 (delete distance to go / spindle reset)
The direction of rotation is deleted in the event of all alarms generating a spindle quick stop. The last
programmed spindle speed (S value) is retained. Once the source of the alarm has been eliminated, the spindle
must be restarted.
Spindle actual speed display and spindle behavior with G96, G961
DB31, ... DBX61.4 (axis/spindle stationary)
The speed at which the spindle is deemed to be "stationary" is set with the machine data:
MD36060 $MA_STANDSTILL_VELO_TOL
The value should be measured in such a way that the following NC/PLC interface signal is reliably present at a
standstill:
DB31,... DBX61.4 (axis/spindle stationary)
If DB31,... DBX61.4 (axis/spindle stationary) is signaled and there is no closed-loop position control active for the
spindle, an actual speed of zero is displayed at the operator interface, and zero is read with the system variable
$AA_S[<n>].
References:
Function Manual, Basic Functions; Various Interface Signals and Functions (A2)
Spindle response at constant cutting rate G96, G961
• At the start of machining (transition from G0 to Gx) and after NC stop, G60 (exact stop, modal) and G9 (exact
stop, non-modal) the system waits until the actual speed has reached the speed setpoint tolerance range
before starting the path.
DB31, ... DBX83.5 (nact = nset)
• The NC/PLC IS:
DB31, ... DBX83.5 (nact = nset)
and
DB31, ... DBX83.1 (setpoint speed limited) are also set to defined values
even if significant speed changes are specified (transverse axis travels towards position 0).
Value Meaning
0 When the spindle is reset or at the end of the program, the spindle immediately decelerates
to a stop at the active acceleration rate. The last programmed spindle speed and direction of
rotation are deleted.
1 Upon reset or at the end of the program, the last programmed spindle speed (S-value) and
the last programmed direction of spindle rotation (M3, M4, M5) are retained. The spindle is
not braked.
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