Deselecting The Trc (G40); Compensation At Outside Corners - Siemens SINUMERIK 840D sl Function Manual

W1: Tool offset
2.5 2D tool radius compensation
Program code
N80 M 30
Note
The contour generated in this way is modified by tool radius compensation, which is activated
in the SAR approach block and deactivated in the SAR retraction block.
The tool radius compensation allows for an effective radius of 15, which is the sum of the tool
radius (10) and the contour offset (5). The resulting radius of the tool center path in the
approach block is therefore 10, and 5 in the retraction block.
2.5.5

Deselecting the TRC (G40)

G40 instruction
TRC is deselected with the G40 instruction.
Special points to be noted
● TRC can only be deselected in a program block with G0 (rapid traverse) or G1 (linear
interpolation).
● If D0 is programmed when tool radius compensation is active, compensation is not
deselected and error message 10750 is output.
● If a geometry axis is programmed in the block with the tool radius compensation
deselection, then the compensation is deselected even if it is not on the current plane.
2.5.6

Compensation at outside corners

G450/G451
The G commands G450/G451 can be used to control the response for discontinuous block
transitions at outside corners:
Command
G450
G451
70
Meaning
Discontinuous block transitions with transition circle
Discontinuous block transitions with intersection of equidistant paths
Comment
Function Manual, 06/2019, A5E47435126B AA
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