Siemens SINUMERIK 840D sl Programming Manual

2.10 Tool radius compensation
2.10.1 Tool radius compensation (G40, G41, G42, OFFN)
When tool radius compensation (TRC) is active, the control automatically calculates the
equidistant tool paths for various tools.
TXLGLVWDQWH
TXLGLVWDQWH
Syntax
G0/G1 X... Y… Z... G41/G42 [OFFN=<value>]
...
G40 X... Y… Z...
Meaning
G41: Activate TRC with machining direction left of the contour.
G42: Activate TRC with machining direction right of the contour.
OFFN=<value>: Allowance on the programmed contour (normal contour offset) (optional),
e.g. to generate equidistant paths for rough finishing.
G40: Deactivate TRC.
Fundamentals
2.10 Tool radius compensation
NC programming
Programming Manual, 12/2019, 6FC5398-2EP40-0BA0 251

Siemens SINUMERIK 840D sl Specifications

General

Control Type	CNC
Number of Axes	Up to 31
Max Number of Channels	10
Interfaces	Ethernet, PROFIBUS, PROFINET, USB
Interpolation	5-axis interpolation
Operating Temperature	0°C to 45°C
Relative Humidity	Up to 95% (non-condensing)
Display	TFT color display, various sizes
Programming Languages	DIN/ISO
Safety Features	Safety Integrated
PLC	Integrated PLC S7-300
Drive Interface	SINAMICS S120
Data Storage	CF card, USB
Operating System	Windows-based