HEIDENHAIN TNC 640, User Manual, Page: 500 / 948

Miscellaneous Functions | Miscellaneous functions for path behavior
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HEIDENHAIN | TNC 640 | Conversational Programming User's Manual | 10/2017
Rounding corners: M197
Standard behavior
With active radius compensation, the control inserts a transition arc
at outside corners. This may lead to rounding of that edge.
Behavior with M197
With the
M197
function, the contour at the corner is tangentially
extended and a smaller transition arc is then inserted. When you
program the
M197
function and then press the
ENT
key, the control
opens the
DL
input field. In
DL
, you define the length the control
by which the control extends the contour elements. With
M197
,
the corner radius is reduced, the corner is rounded less and the
traverse movement is still smooth.
Effect
The
M197
function acts blockwise and is only effective on outside
corners.
Example
L X... Y... RL M197 DL0.876