HEIDENHAIN TNC 620 E, User Manual

Page: 296 / 840

Programming Contours | Path contours

Cartesian coordinates
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HEIDENHAIN | TNC 620 | Conversational Programming User's Manual | 10/2017
Circle CT with tangential connection
The tool moves on an arc that starts tangentially to the previously
programmed contour element.
A transition between two contour elements is called tangential
when there is no kink or corner at the intersection between the
two contours—the transition is smooth.
The contour element to which the tangential arc connects must
be programmed immediately before the
CT
block. This requires at
least two positioning blocks.
Coordinates
of the arc end point, and if
necessary:
Feed F
Miscellaneous function M
Example
7 L X+0 Y+25 RL F300 M3
8 L X+25 Y+30
9 CT X+45 Y+20
10 L Y+0
A tangential arc is a two-dimensional operation: the
coordinates in the
CT
block and in the contour element
preceding it must be in the same plane of the arc!