Termination Of Follow-Up Control; Switching Off Intermediate Block Generation - Siemens SINUMERIK 840D sl Function Manual

T3: Tangential control
8.3 Using tangential follow-up control
System variable $AC_TLIFT_BLOCK
The system variable $AC_TLIFT_BLOCK indicates whether the current block is an
intermediate block generated by TLIFT. If the value of the system variable is 1, TLIFT
inserted the current block as an intermediate block.
8.3.4

Termination of follow-up control

Programming
The programming is carried out using the pre-defined sub-program TANGOF. The name of the
following axis to be decoupled from its leading axes for the remainder of the machining
operation must be transferred to the control in conjunction with the subroutine name TANGOF.
With reference to the example in section "Assignment between leading axes and following
axis", the termination is as follows:
TANGOF(C)
The follow-up control process initiated with TANGON is terminated.
Termination of follow-up control initiates a preprocessing stop.
RESET/end of part program
An activated tangential control can remain active for further machining operations. For further
details, see:
References:
/FB1/ Function Manual Basic Functions; Coordinate Systems, Axis Types, Axis Configuration
(K2)
Section: Actual-value system for workpiece
Section: External zero offset
Note
The assignment between 2 master axes and a slave axis programmed with TANG( ... ) is
not canceled by TANGOF. Refer to section "Canceling the definition of a follow-up axis
assignment".
8.3.5

Switching off intermediate block generation

In order to stop generating the intermediate block at corners during program execution with
active tangential follow-up control, the TANG() block must be repeated without following
TLIFT().
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Function Manual, 09/2011, 6FC5397-2BP40-2BA0
Special Functions