S1: Spindles
16.2 Operating modes
Basic Functions
1256 Function Manual, 09/2011, 6FC5397-0BP40-2BA0
is used to go to control mode.
The last programmed spindle speed (S value) is reactivated.
• Control mode → Positioning mode
To stop the spindle from rotation (M3 or M4) with orientation or to reorient it from standstill (M5), SPOS, M19
or SPOSA are used to switch to positioning mode.
• Positioning mode → Control mode
M3, M4 or M5 are used to change to control mode if the orientation of the spindle is to be terminated. The last
programmed spindle speed (S value) is reactivated.
• Positioning mode → Oscillation mode
If the orientation of the spindle is to be terminated, M41 to M45 can be used to change to oscillation mode.
When the gear change is complete, the last programmed spindle speed (S value) and M5 (control mode) are
reactivated.
• Positioning mode → Axis mode
If a spindle was stopped with orientation, the assigned axis name is used to program a change to axis mode.
The gear step is retained.
• Control mode → Axis mode
Switching from control mode to axis mode can be also achieved by the programming of M70. In this case, a
rotating spindle is decelerated in the same way as for M5, position control activated and the zero parameter
set selected.
• Axis mode → Control mode
To terminate axis mode, M3, M4 or M5 can be used to change to control mode. The last programmed spindle
speed (S value) is reactivated.
• Axis mode → Oscillation mode
To terminate axis mode, M41 to M45 can be used to change to oscillation mode (only if the programmed gear
step is not the same as the actual gear step). When the gear change is complete, the last programmed
spindle speed (S value) and M5 (control mode) are reactivated.
16.2.3 Control mode
When open-loop control mode?
The spindle is in control mode with the following functions:
• Constant spindle speed:
- S... M3/M4/M5 and G93, G94, G95, G97, G971
- S... M3/M4/M5 and G33, G34, G35
- S... M3/M4/M5 and G63
• Constant cutting rate:
- G96/G961 S... M3/M4/M5
The spindle need not be synchronized.
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