Programming instructions

NC Programming 17VRS Motion Blocks
4-57
DOK-MTC200-NC**PRO*V17-ANW1-EN-P
4.8 Main Spindle Synchronization
Use of Main Spindle Synchronization
Main spindle synchronization is primarily used on lathes to transfer parts,
to recess parts, to machine shafts, for polygon turning, and for non-round
turning.
Functionality of Main Spindle Synchronization
Up to 3 spindles can be operated in sync within a process on the CNC.
One spindle is used as the master spindle, while the other two spindles
are operated as synchronized spindles. The CNC always traverses the
master and synchronized spindles such that they remain angularly in
sync. The following example illustrates the relationship with angular syn-
chronization between a master spindle and a synchronized spindle.
Angular Position of
the Spindles
Remark
Prior to Synchronization
Master Synchronized
spindle spindle
Each spindle is located in any given random position
After synchronization
step
Master Synchronized
spindle spindle
The synchronized spindle moves to the specified angular
offset position (= 90°) (translation ratio = 1).
After rotation of 90°
Master Synchronized
spindle spindle
The synchronized spindle has rotated 90° in synch with
the master spindle.
After a change in the
position offset of 45°
Master Synchronized
spindle spindle
The synchronized spindle has rotated 45° with respect to
the master spindle.
The advantage of the absolute angular synchronization mode is that the
angular offset between the master and the synchronized spindles can be
set in a defined manner at any point in time.
Permissible Configurations
The rules which define the permissible spindle configurations for the main
spindle synchronization are listed below. If one of these rules is violated at
the beginning of synchronization or during synchronization, the NC inter-
rupts the process and generates an error message.
•
Only one master spindle can be used in a main spindle synchronization.
•
All spindles used in a main spindle synchronization must belong to one
process.
−
If the spindles of a different process are to participate in the main
spindle synchronization, this must be declared to the respective
process using the axis transfer commands (GAX/FAX).