Siemens SINUMERIK 840Di Function Manual page 1740

Detailed Description
2.4 Tool: Tool radius compensation 2D (TRC)
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.
Tool radius compensation allows for an effective radius of 15, which is the sum of the tool
radius (10) and the contour compensation (5). The resulting radius of the tool center path in
the approach block is therefore 10, and 5 in the retraction block.
2.4.5 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
• If D0 is programmed when tool radius compensation is active, compensation is not
• If a geometry axis is programmed in the block with the tool radius compensation
2.4.6 Compensation at outside corners
G450/G451
The G functions G450/G451 can be used to control the response with discontinuous block
transitions at outside corners:
G450
G451
2-60
interpolation).
deselected and error message 10750 is output.
deselection, then the compensation is deselected even if it is not on the current plane.
... Discontinuous block transitions with transition circle
... Discontinuous block transitions with intersection of equidistant paths
Function Manual, 08/2005 Edition, 6FC5397-0BP10-0BA0
Tool Compensation (W1)