Siemens SINUMERIK 808D Programming And Operating Manual page 114

Commands
The cutter radius compensation is called with the following G functions.
G function
G40
G41
G42
The tool radius compensation is called by executing G41 or G42 and deselected through G40. The offset direction is
determined through the specified G function (G41, G42) and the offset amount is determined through the D function.
Cutter radius compensation:
● A negative offset value of the tool radius is equivalent to a change of compensation side (G41, G42). The D function
must either be programmed in the same block as G41 or G42 or in a previous block. D00 means tool radius = "0".
● The selection of the plane in which the tool radius is active is done with G17, G18 or G19. The G function used to select
the plane is to be programmed in the same block as G41 or G42 or in the block before G41 or G42.
G function
G17
G18
G19
The selected plane should not be changed if the tool offset is selected, otherwise there is an error message.
Activation/deactivation of tool radius compensation
A drive command must be programmed with G0 or G1 if an NC block contains G40, G41 or G42. At least one axis of the
selected working plane must be specified in this drive command.
Note
Compensation mode
Compensation mode may only be interrupted by a certain number of consecutive blocks or M functions which do not contain
drive commands or positional data in the compensation plane: Standard 3.
Note
Machine manufacturer
The number of successive interruptions blocks or M functions can be set via the machine data 20250
CUTCOM_MAXNUM_DUMMY_BLOCKS (refer to machine manufacturer).
114
Function
Deselection of the tool radius compensation
Tool radius compensation (tool works in machining
direction to the left of the contour)
Tool radius compensation (tool works in machining
direction to the right of the contour)
Function
Selection of plane X-Y
Selection of plane Z-X
Selection of plane Y-Z
G group
07
07
07
G group
02
02
02
Programming and Operating Manual (ISO Turning/Milling)
01/2017