Selecting Synchronous Mode For A Part Program - Siemens SINUMERIK 840D Function Manual

S3: Synchronous spindle
19.1 Brief description
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 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.
● The following spindle is always located in the channel in which the coupling has been
activated using COUPON or COUPONC.
See also
R1: Referencing (Page 291)
19.1.4

Selecting synchronous mode for a part program

Activate coupling COUPON, COUPONC
Language command 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 preconditions must be fulfilled before synchronous operation can be activated (see
Section "Prerequisites for synchronous mode (Page 855)").
The COUPONC command 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
following spindles.
COUPON(FS, LS)
2. Activation of coupling with a defined angular offset POS
spindle. With this method, the angular offset must be programmed on selection.
COUPON(FS, LS, POS
Block change behavior
Before synchronous operation is selected, it must be determined under what conditions the
block change must occur when the synchronous mode is activated (see Section "Definition
(COUPDEF) (Page 865)").
856
)
FS
between leading and following
FS
Axes and spindles
Function Manual, 06/2019, A5E47437747B AA