Siemens SINUMERIK 840D sl Programming Manual page 527

Simplified programming:
A coupling factor of 1 does not have to be programmed explicitly.
TANG(C, X, Y, 1, "B", "P") can be abbreviated to TANG(C, X, Y, , , "P"). As
before, TANG(C, X, Y, 1, "B", "S") can be written as TANG(C, X, Y).
The TLIFT(...) statement must be programmed immediately after the axis assignment with
TANG(...). Example:
TANG(C,X,Y...)
TLIFT(C)
Deactivate TLIFT
Repeat axis assignment TANG(...) without following it by TLIFT(...).
TANGDEL Delete definition of a tangential follow-up
An existing user-defined tangential follow-up must be deleted if a new tangential follow-up
with the same following axis is defined in the preparation call TANG. Deletion is only possible
if the coupling with TANGOF(Faxis) is deactivated.
Significance
TANG
TANGON
TANGOF
Job Planning
Programming Manual, 06/2009, 6FC5398-2BP20-0BA0
8.1 Tangential control (TANG, TANGON, TANGOF, TLIFT, TANGDEL)
Preparatory statement for the definition of a tangential follow-up;
default setting: 1
TANG(C,X,Y,1,"B") means:
Rotary axis C follows the geometry axes X and switch-out
Y.TLIFT
Activate tangential control specifying following axis and required
offset angle of the following axis and, if necessary, rounding
path, angle deviation.
TANGON(C,90) means:
The C axis is the following axis. On every movement of the path
axes, it is rotated into a position at 90° to the path tangent.
Deactivate tangential control specifying following axis.
The following axis is specified in order to deactivate the
tangential control:
TANGOF(C)
Path traversing behavior
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