Introduction – HEIDENHAIN TNC 620 (340 56x-01) User Manual

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5.4 Thr

ee-Dimensional T

ool Compensation (Sof

e Option

5.4 Three-Dimensional Tool

Compensation (Software
Option 2)

Introduction

The TNC can carry out a three-dimensional tool compensation (3-D
compensation) for straight-line blocks. Apart from the X, Y and Z
coordinates of the straight-line end point, these blocks must also
contain the components NX, NY and NZ of the surface-normal vector
(see figure and explanation further down on this page).

If, in addition, you want to carry out a tool orientation or a three-
dimensional radius compensation, these blocks need also a
normalized vector with the components TX, TY and TZ. This vector
determines the tool orientation (see figure).

The straight-line end point, the components for the surface-normal
vector as well as those for the tool orientation must be calculated by
a CAM system.

Application possibilities

Use of tools with dimensions that do not correspond with the
dimensions calculated by the CAM system (3-D compensation
without definition of the tool orientation).

Face milling: compensation of the milling machine geometry in the
direction of the surface-normal vector (3-D compensation with and
without definition of the tool orientation). Cutting is usually with the
end face of the tool.

Peripheral milling: compensation of the mill radius perpendicular to
the direction of movement and perpendicular to the tool direction
(3-D radius compensation with definition of the tool orientation).
Cutting is usually with the lateral surface of the tool.