Behavior Of The Synchronous-Spindle Coupling For Reset; Special Features; Special Features Of Synchronous Mode In General - Siemens SINUMERIK 840D Function Manual

19.3.2

Behavior of the synchronous-spindle coupling for reset

The behavior of the synchronous operation for reset and at program end depends on the setting
in the following machine data:
Configured synchronous-spindle coupling
Response
Maintain coupling
Deselect coupling
Activate configured data
Programmed synchronous-spindle coupling
Maintain coupling
Deselect coupling
19.4

Special features

19.4.1

Special features of synchronous mode in general

Control dynamics
When using the setpoint coupling, the position control parameters of FS and LS (e.g. K
should be matched with one another. If necessary, different parameter blocks should be
activated for speed control and synchronized mode. The control parameters of the following
spindle may differ from position control, feedforward control and parameter block, as also in the
uncoupled case, set using MD30455 $MA_MISC_FUNCTION_MASK (see Section "Special
points regarding start-up of a synchronous spindle coupling (Page 886)").
Feedforward control
Due to the improved control system dynamic response it provides, feedforward control for the
following and leading spindles in synchronous mode is always active.
It can, however, be deselected for FS and LS with axis-specific MD32620 $MA_FFW_MODE.
If MD32620 $MA_FFW_MODE is set to zero, there are function limitations. Position control can
no longer be activated in motion with SPCON. SPOS, M19 or SPOSA are therefore not
possible. The NC part program cannot deactivate the feedforward control for LS and FS with
FFWOF.
The feedforward control mode (speed or torque feedforward control) is defined in axis-specific
MD32620 $MA_FFW_MODE defined (see Function Manual "Monitoring and Compensating",
Section "K3: Compensations").
Axes and spindles
Function Manual, 06/2019, A5E47437747B AA
MD21330 $MC_COUPLE_RE‐
SET_
MODE_1
Bit 1 = 0
Bit 1 = 1
Bit 6 = 1
MD20110 $MC_RESET_MODE_MASK
Bit 0 = 1, Bit 10 = 1
Bit 0 = 1, Bit 10 = 0
S3: Synchronous spindle
19.4 Special features
MD20110 $MC_RE‐
SET_MODE_MASK
Bit 0 = 1
Bit 0 = 1
Bit 0 = 1
factor)
V
873