Siemens SINUMERIK 840D sl Function Manual page 901

● When synchronous mode is not active, the FS and LS can be operated in all other
● The speed ratio can also be altered when the spindles are in motion in active
● With synchronous spindle coupling switched on, the offset of the FS to the LS (overlaid
Coupling options
Synchronous spindle couplings can be defined as both
● permanently configured via channel-specific machine data
● freely defined using language instructions (COUP...) in the part program
The following variants are possible:
1. A fixed configuration for a coupling can be programmed via machine data. In addition, a
2. No coupling is configured via machine data. In this case, the couplings can be user-
Separate following spindle interpolator
The separate following spindle interpolator allows a number of following spindles from
different channels or from another NCU to be coupled as defined by the user to a single
leading spindle. The following spindle interpolator is
● COUPON or COUPONC activated and
● COUPOF or COUPOFS deactivated
and is always located in the channel in which the COUPON, COUPONC statement has been
programmed for the following spindle. If the following spindle to be activated was previously
programmed in another channel, COUPON/COUPONC initiates an axis replacement and
fetches the spindle into its own channel.
Certain synchronous spindle functions can be controlled from the PLC by means of coupling-
specific axial VDI interface signals. The latter act exclusively on the slave spindles and do
not affect the leading spindle. For more information on this, see "Controlling synchronous
spindle coupling via PLC".
Definition of synchronous spindles
Before synchronous operation is activated, the spindles to be coupled (FS, LS) must be
defined.
Extended Functions
Function Manual, 03/2009, 6FC5397-1BP10-4BA0
spindle modes.
synchronous mode.
movement) can be altered.
(hereinafter referred to as "permanent coupling configuration") as well as
(hereafter referred to as "user defined coupling").
second coupling can be freely defined via the part program.
defined and parameterized via the part program.
Synchronous Spindles (S3)
Brief description
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