Siemens SINUMERIK 840D sl Function Manual page 430

T3: Tangential control
8.6 Examples
Example Corner in area
Programming
TANG(A,X,Y,1.0,"B")
TLIFT(A)
G1 G641 X0 Y0 Z0 A0
TANGON(A,0)
N4 X10
N5 Z10
N6 Y10
M30
Here, a corner is hidden in the area between N4 and N6. N6 causes a tangent jump. That is
why there is no rounding between N5 and N6 and an intermediate block is inserted.
In the case of a hidden corner in area, an intermediate block is inserted before the block that
has caused the tangent jump. The intermediate block moves the following axis to the new
tangent position.
430
Function Manual, 09/2011, 6FC5397-2BP40-2BA0
Special Functions