Siemens SINUMERIK 840D sl Function Manual page 906

Synchronous Spindles (S3)
Brief description
● The following applies to setpoint couplings (DV):
● Before selecting the synchronous mode, the gear stage necessary for FS and LS must be
Cross-channel coupling
The LS can be located in any channel.
● The LS can be exchanged between channels by means of "Axis exchange".
● When several following spindles are coupled to one leading spindle, the dynamic
● The following spindle is always located in the channel in which the coupling has been
14.1.5 Selecting the part program's synchronous mode
Activate coupling COUPON, COUPONC
Language instruction COUPON activates the coupling in the part program between the
programmed spindles with the last valid parameters and thus also activates synchronous
mode. This coupling may be a fixed configuration or user-defined. The leading spindle and/or
following spindle may be at standstill or in motion at the instant of activation.
Certain conditions must be fulfilled before synchronous operation can be activated, see
Section "Prerequisites for synchronous mode".
The COUPONC statement adopts the previous programmed direction of spindle rotation and
spindle speed for the following and leading spindle in the part program. It is not possible to
specify an angular offset.
COUPON activation variants
Two different methods can be selected to activate synchronous mode:
1. Fastest possible activation of coupling with any angular reference between leading and
2. Activation of coupling with a defined angular offset POS
906
To ensure more accurate synchronization characteristics, the LS should be in position
control mode (language instruction SPCON) before the coupling is activated.
selected. In synchronous mode, gear stage changeover and therefore oscillation mode
are not possible for FS and LS. Upon request, an alarm message is generated.
response of the coupling is determined by the weakest response as a function of the
coupling factor. The acceleration rate and maximum speed are reduced for the leading
spindle to such a degree that none of the coupled following spindles can be overloaded.
activated using COUPON or COUPONC.
following spindles.
COUPON(FS, LS)
spindle. With this method, the angular offset must be programmed on selection.
COUPON(FS, LS, POS )
FS
between leading and following
FS
Function Manual, 03/2009, 6FC5397-1BP10-4BA0
Extended Functions