Siemens SINUMERIK 840D sl Function Manual page 1840

Detailed Description
2.4 Tool radius compensation 2D (TRC)
Why TRC?
The contour (geometry) of the workpiece programmed in the part program should be
independent of the tools used in production. This makes it necessary to draw the values for
the tool length and tool radius from a current offset memory. Tool radius compensation can
be used to calculate the equidistant path to the programmed contour from the current tool
radius.
Figure 2-15
TRC on the plane
TRC is active on the current plane (G17 to G19) for the following types of interpolation:
• Linear interpolation
•
•
•
•
2.4.2 Selecting the TRC (G41/G42)
Direction of compensation
TRC calculates a path, which is equidistant to the programmed contour. Compensation can
be performed on the left- or righthand side of the programmed contour in the direction of
motion.
Command
G41
G42
G40
52
Workpiece contour (geometry) with equidistant path
Circular interpolation
Helical interpolation
Spline interpolation
Polynomial interpolation
Significance
TRC on the lefthand side of the contour in the direction of motion
TRC on the righthand side of the contour in the direction of motion
Deselection of TRC
...
G0,G1
...
G2, G3, CIP
...
G2,G3
...
ASPLINE, BSPLINE, CSPLINE
...
POLY
Function Manual, 11/2006, 6FC5397-0BP10-2BA0
Basic logic functions: Tool Offset (W1)