Siemens sinumerik 840d Programming Manual page 308

Path Traversing Behavior
9
9.2 Coupled motion TRAILON, TRAILOF
840D 840D
NCU 571 NCU 572
NCU 573
Sequence
Defining coupled-axis combinations, TRAILON
The coupled axes are defined and activated
simultaneously with the modal language command
TRAILON.
TRAILON(V,Y)
V = trailing axis, Y = leading axis
The number of coupled axes that can be activated
simultaneously is restricted only by the possible
combinations of axes on the machine.
Coupled motion always takes place in the basic
coordinate system (BCS).
Coupled axis types
A coupled-axis group can consist of any combination
of linear and rotary axes. A simulated axis can also
be defined as a leading axis.
Coupled-motion axes
Up to two leading axes can be assigned
simultaneously to a trailing axis. The assignment is
made in different combinations of coupled axes.
A trailing axis can be programmed with all the
available motion commands (G0, G1, G2, G3,
...etc.). In addition to paths defined independently,
the trailing axis also traverses the distances derived
from its leading axes, allowing for the coupling
factors.
A trailing axis can also act as a leading axis for other
trailing axes. Various combinations of coupled axes
can be set up in this way.
9-308
FM-NC 810D 840Di
SINUMERIK 840D/840Di/810D/FM-NC Programming Guide Advanced (PGA) – 04.00 Edition
08.97
9
 Siemens AG 2000. All rights reserved