Siemens sinumerik 840d Programming Manual page 281

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Face milling

For this type of 3D milling, you require line-by-line

definition of 3D paths on the workpiece surface.

The tool shape and dimensions are taken into

account in the calculations that are normally

performed in CAM.

In addition to the NC blocks, the postprocessor

writes the tool orientations (when five-axis

transformation is active) and the G code for the

desired 3D tool offset into the part program.

This feature offers the machine operator the option

of using slightly smaller tools than that used to

calculate the NC paths.

NC blocks have been calculated with a 10 mm mill.

In this case, the workpiece could also be machined

with a mill diameter of 9.9 mm, although this would

result in a different surface profile.

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

8.5 Activate 3D tool offsets

Tool Offsets

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