Superimposing A Linear Motion On A Circular Contour - HEIDENHAIN TNC 620 User Manual

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Superimposing a linear motion on a circular contour

It is possible to superimpose a linear motion on a circular contour
defined in Cartesian coordinates, e.g. in order to create a helix.
Superimposed linear motions are possible for the following types of
circular contours:
Circular contour C
Further information: "Circular arc C around circle center CC",
Page 159
Circular contour CR
Further information: "Circular arc CR with fixed radius", Page 161
Circular contour CT
Further information: "Circular arc CT with tangential transition",
Page 163
The tangential transition is effective only for the
axes in the circular plane, and not also for the
superimposed linear motion.
As an alternative, you can superimpose a circular contour defined in
polar coordinates on a linear motion.
Further information: "Helix", Page 171
Input notes
To superimpose a linear motion on a circular contour defined in
Cartesian coordinates, program the additional LIN syntax element.
You can define a linear, rotary, or parallel axis, e.g. LIN_Z.
The LIN syntax element can be defined using free syntax input.
Further information: "Freely editing an NC program", Page 197
Example
11 CR X+50 Y+50 R+50
LIN_Z-3 DR-
164
Programming contours | Path contours — Cartesian coordinates
; Circular contour with linear Z-axis
superimposition
HEIDENHAIN | TNC 620 | Klartext Programming User's Manual | 01/2022