Behavior Of Synchronism Signals During Synchronism Correction; Delete Synchronism Correction And Nc Reset; Special Points Regarding Start-Up Of A Synchronous Spindle Coupling - Siemens SINUMERIK 840D Function Manual

S3: Synchronous spindle
19.4 Special features
19.4.5

Behavior of synchronism signals during synchronism correction

Effect of synchronism correction
New synchronism signals are produced by comparing the actual values with the corrected
setpoints. Once a correction process has been undertaken, the synchronism signals should be
present again.
19.4.6

Delete synchronism correction and NC reset

Variable $AA_COUP_CORR[Sn] returns the value zero for different situations in which the
synchronism correct is deleted:
● Once a synchronized spindle coupling has been activated for the following in question
with COUPON(..)/COUPONC(..), an existing synchronism correction is adopted in the setpoint
position.
● A synchronism correction active during NC reset but not at the parts program end is adopted
in the setpoint position. This does not affect the synchronism signals.
● At M30, an existing synchronism correction is retained
● At the user end, the correction value can also be deleted at any early point by describing the
variable $AA_COUP_CORR with the value zero. The synchronism correction is removed
immediately and using a ramp with reduced acceleration rate if larger values are involved.
19.4.7

Special points regarding start-up of a synchronous spindle coupling

Spindle start-up
The leading and following spindles must be started up initially like a normal spindle. The
corresponding procedure is described in:
Further information
Commissioning Manual CNC: NC, PLC, drive
S1: Spindles (Page 733)
Requirements
The following parameters must then be set for the synchronous spindle pair:
● The machine numbers for the leading and following spindles
(for permanently configured coupling with channel-specific machine data MD21300
$MC_COUPLE_AXIS_1[n])
● The required coupling mode (setpoint, actual value or speed coupling)
(for permanently configured coupling with channel-specific machine data
MD21310 $MC_COUPLING_MODE_1[n])
886
Axes and spindles
Function Manual, 06/2019, A5E47437747B AA