Siemens sinumerik 840d Programming Manual page 280

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Tool Offsets

8.5 Activate 3D tool offsets

Difference between 2 1/2D and 3D tool radius

compensation

In 3D tool radius compensation tool orientation can

2 1/2D tool radius compensation assumes the use of

a tool with constant orientation.

3D tool radius compensation is also called 5D tool

radius compensation, because in this case 5

degrees of freedom are available for the orientation

of the tool in space.

Circumferential milling

The type of milling used here is implemented by

defining a path (guide line) and the corresponding

orientation. In this type of machining, the shape of

the tool on the path is not relevant. The only deciding

factor is the radius at the tool insertion point.

The 3D TRC function is limited to cylindrical tools.

SINUMERIK 840D/840Di/810D/FM-NC Programming Guide Advanced (PGA) − 04.00 Edition

Path of tool center point

equidistant from contour

Circumferential milling

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