Siemens Sinumerik 840D sl Programming Manual page 551

Activate synchronized mode COUPON, POSFS
• Activation of coupling with any angle reference between LS and FS:
- COUPON(S2,S1)
- COUPON(S2,S1,<POSFS>)
- COUPON(S2)
• Activation of coupling with angular offset <POSFS>
Position-synchronized coupling for profiled workpieces.
<POSFS>refers to the 0° position of the lead spindle in the positive direction of rotation
<POSFS> value range: 0°... 359,999°
- COUPON(S2,S1,30)
You can use this method to change the angle offset even when the coupling is already
active.
Position the following spindle
When the synchronized spindle coupling is active, following spindles can also be positioned
within the ±180° range independently of the motion initiated by the master spindle.
Positioning SPOS
The following spindle can be interpolated with SPOS=....
Example:
SPOS[2]=IC(-90)
Further information about SPOS appears in:
Reference:
Programming Manual, Basics
Difference in speed M3 S... or M4 S...
A difference in speed results from signed superimposition of two sources of speed and is
programmed again for the following spindle e.g. with S<n>=... or M<n>=3, M<n>=4 in the
speed control mode during an active synchronized spindle coupling. During the process, this
speed component is derived from the main spindle using the coupling factor and the following
spindle added to this with the correct prefix.
Note
When the direction of rotation is M3 or M4, the speed S... also has to be reprogrammed
because otherwise an alarm is triggered to report missing programming.
For more information about the speed difference, please refer to:
Reference:
Function Manual, Extended Functions; Synchronous Spindle (S3).
Job planning
Programming Manual, 02/2011, 6FC5398-2BP40-1BA0
Axis couplings
9.5 Synchronous spindle
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