Circle Ct With Tangential Connection - HEIDENHAIN TNC 620 User Manual

7

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!
296
Programming Contours | Path contours  Cartesian coordinates
HEIDENHAIN | TNC 620 | Conversational Programming User's Manual | 10/2017