Programming principles
1.6 Tool and tool offset
Turning Part 2: Programming (Siemens instructions)
80 Programming and Operating Manual, 05/2012, 6FC5398-5DP10-0BA0
1.6.6 Tool radius compensation OFF: G40
Functionality
The compensation mode (G41/G42) is deselected with G40. G40 is also the switch-on
position at the beginning of the program.
The tool ends the block before G40 in the normal end position (compensation vector vertical
to the tangent in the end point); independently of the start angle.
If G40 is active, the reference point is the tool tip. The tool tip then travels to the programmed
point upon deselection.
Always select the end point of the G40 block such that collision-free traversing is
guaranteed!
Programming
G40 X... Z... ; Tool radius compensation OFF
Remark: The compensation mode can only be deselected with linear interpolation (G0, G1).
Program both axes. If you only specify one axis, the second axis is automatically completed
with the last programmed value.
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Figure 1-47 Ending the tool radius compensation with G40, with the example of G42,
cutting edge position =3
Programming example
N10 T4 D1 M3 S1000 F0.1
N20 G0 X50 Z50
N30 G1 G42 X30 Z40
N40 G2 X20 Z20 R15
N50 G1 X10 Z10
N60 G40 G1 X0 Z0 ;Last block on the contour, circle or straight line, P1
N70 M30 ;Switch off tool radius compensation,P2
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