Brief Description - Siemens sinumerik 840D sl Function Manual

Brief description

Why 3D TRC?
3D tool radius compensation is used to machine contours with tools that can be controlled in
their orientation independently of the tool path and shape.
Note
This description is based on the specifications for 2D tool radius compensation.
References:
/FB1/ Function Manual, Basic Functions; Tool Offset (W1)
How 2 / D and 3D TRC differ
1
2
• With 2
• With 3D TRC, surfaces with variable orientation are generated.
Circumferential milling, face milling
The following diagram shows the differences between 2
circumferential milling operations.
Special functions: 3D Tool Radius Compensation (W5)
Function Manual, 11/2006, 6FC5397-2BP10-2BA0
/ D TRC, it is assumed that the tool is always space-bound. Tools with constant
1
2
orientation (cylindrical tools) are used for circumferential milling operations.
While the orientation of the machining surface is not constant when other tools are used,
it is determined by the contour and cannot thus be controlled independently of it.
The prerequisite for circumferential milling is that the tool orientation can be changed, i.e.
in addition to the 3 degrees of freedom needed to position the tool (normally 3 linear
axes), a further two degrees of freedom (2 rotary axes) are required to set the tool
orientation (5-axis machining).
End faces can be milled with 3 or 5 degrees of freedom.
/ D and 3D TRC with respect to
1
2
1
5