Switching On Corner Response - Siemens SINUMERIK 840D sl Function Manual

following axes made beforehand with TANG. Refer to Section "Assignment between leading
axes and following axis". An angle between the tangent and the position of the following axis
can be specified optionally when follow-up is activated. This angle is maintained by the
control for as long as the following axis is made to follow. The angle is added to the angle
stored in the following machine data:
MD37402 $MA_TANG_OFFSET (preselection angle for tangential follow-up)
If the angle is zero both in TANGON and in the MD, the following axis takes the direction of the
tangent.
Figure 8-2
Activation is programmed as follows for the above example and an offset angle of 90
degrees:
TANGON(C, 90)
In response to every motion in path axes X and Y, following axis C is rotated to an angle of 90
degrees in the relation to the path tangent.
8.3.3

Switching on corner response

After axis assignment with TANG(), the TLIFT() instruction must be written if the corner
response is to be contained in an intermediate block.
TLIFT (C)
The control reads the following machine data for the tangential following axis C:
MD37400 $MA_EPS_TLIFT_TANG_STEP (Tangent angle for corner recognition)
If the tangential angle jump exceeds the angle (absolute value) of the angle set in the MD, the
control recognizes a "corner" and approaches the new position of the follow-up axis via an
intermediate block.
Special Functions
Function Manual, 09/2011, 6FC5397-2BP40-2BA0
Tangential control, offset angle of 90 degrees to path tangent
T3: Tangential control
8.3 Using tangential follow-up control
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