Spindle Motions; Coupled Motion (Trailon, Trailof) - Siemens SINUMERIK 840D sl Programming Manual

Motion synchronous actions
10.4 Actions in synchronized actions
10.4.20

Spindle motions

Function
Spindles can be positioned completely unsynchronized with respect to the parts program
from synchronized actions. This type of programming is advisable for cyclic sequences or
operations that are strongly dependent on events.
If conflicting commands are issued for a spindle via simultaneously active synchronized
actions, the most recent spindle command takes priority.
Example of starting/stopping/positioning spindles
ID=1 EVERY $A_IN[1]==1 DO M3 S1000
ID=2 EVERY $A_IN[2]==1 DO SPOS=270
Example of setting the direction and speed of rotation/ positioning the spindle
ID=1 EVERY $A_IN[1]==1 DO M3 S300
ID=2 EVERY $A_IN[2]==1 DO M4 S500
ID=3 EVERY $A_IN[3]==1 DO S1000
ID=4 EVERY ($A_IN[4]==1) AND ($A_IN[1]==0)
DO SPOS=0
10.4.21

Coupled motion (TRAILON, TRAILOF)

Function
When the coupling is activated from the synchronized action, the leading axis can be in
motion. In this case the following axis is accelerated up to the set velocity. The position of
the leading axis at the time of synchronization of the velocity is the starting position for
coupled-axis motion. The functionality of coupled-axis motion is described in the Section
"Path traversing behavior".
Programming
Activate coupled-axis motion
DO TRAILON(following axis, leading axis,
coupling factor)
Deactivate coupled-axis motion
DO TRAILOF(following axis, leading axis,
leading axis 2)
10-54
;Set direction and speed of rotation
;Position spindle
;Set direction and speed of rotation
;Specify new direction and new speed of
;rotation
;Specify new speed
;Position spindle
Programming Manual, 03/2006 Edition, 6FC5398-2BP10-1BA0
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