Fundamentals
3.1
3
HEIDENHAIN | TNC 620 | ISO Programming User's Manual | 9/2016
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Designation of the axes on milling machines
The X, Y and Z axes on your milling machine are also referred to as
tool axis, principal axis (1st axis) and secondary axis (2nd axis). The
assignment of the tool axis is decisive for the assignment of the
principal and secondary axes.
Tool axis
Principal axis
Secondary axis
X
Y
Z
Y
Z
X
Z
X
Y
Polar coordinates
If the production drawing is dimensioned in Cartesian coordinates,
you also write the NC program using Cartesian coordinates. For
parts containing circular arcs or angles it is often simpler to give the
dimensions in polar coordinates.
While the Cartesian coordinates X, Y and Z are three-dimensional
and can describe points in space, polar coordinates are two-
dimensional and describe points in a plane. Polar coordinates have
their datum at a circle center (CC), or pole. A position in a plane can
be clearly defined by the:
Polar Radius, the distance from the circle center CC to the
position, and the
Polar Angle, the value of the angle between the angle reference
axis and the line that connects the circle center CC with the
position.
Setting the pole and the angle reference axis
The pole is set by entering two Cartesian coordinates in one of the
three planes. These coordinates also set the reference axis for the
polar angle H.
Coordinates of the pole
(plane)
Reference axis of the angle
X/Y
+X
Y/Z
+Y
Z/X
+Z
Summary of Contents for TNC 620 Programming Station
Page 4: ......
Page 5: ...Fundamentals ...
Page 28: ...Contents 28 HEIDENHAIN TNC 620 ISO Programming User s Manual 9 2016 ...
Page 57: ...1 First Steps with the TNC 620 ...
Page 77: ...2 Introduction ...
Page 110: ......
Page 111: ...3 Fundamentals file management ...
Page 166: ......
Page 167: ...4 Programming aids ...
Page 194: ......
Page 195: ...5 Tools ...
Page 234: ......
Page 235: ...6 Programming contours ...
Page 284: ......
Page 285: ...7 Data transfer from CAD files ...
Page 304: ......
Page 305: ...8 Subprograms and program section repeats ...
Page 323: ...9 Programming Q parameters ...
Page 384: ......
Page 385: ...10 Miscellaneous functions ...
Page 407: ...11 Special functions ...
Page 433: ...12 Multiple axis machining ...
Page 475: ...13 Pallet management ...
Page 480: ......
Page 481: ...14 Manual Operation and Setup ...
Page 549: ...15 Positioning with Manual Data Input ...
Page 554: ......
Page 555: ...16 Test Run and Program Run ...
Page 590: ......
Page 591: ...17 MOD Functions ...
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Page 623: ...18 Tables and Overviews ...