Siemens SINUMERIK 840D Operating Manual page 335

Contour element "straight line, e.g. Y"
Parameter
Y
α1
Transition to next
element
Radius
Chamfer
Additional commands
Contour element "Straight line, e.g. XY"
Parameter
X
Y
L
α1
α2
Transition to next
element
Radius
Chamfer
Additional commands
Contour element "Circle"
Parameter
Direction of rotation
R
e.g. X
e.g. Y
e.g. I
e.g. J
α1
Milling
Operating Manual, 03/2010, 6FC5398-7CP20-1BA0
Description
End point Y (abs or inc)
Starting angle to X axis
Type of transition
Radius

Chamfer

R Transition to following element - radius
FS Transition to following element - chamfer
Additional G code commands
Description
End point X (abs or inc)
End point Y (abs or inc)
Length
Starting angle e.g. to the X axis
Angle to the preceding element
Type of transition
Radius

Chamfer

R Transition to following element - radius
FS Transition to following element - chamfer
Additional G code commands
Description
Clockwise direction of rotation

Counterclockwise direction of rotation

Radius
End point X (abs or inc)
End point Y (abs or inc)
Circle center point I (abs or inc)
Circle center point J (abs or inc)
Starting angle to X axis
Programming technological functions (cycles)
8.3 Contour milling
Unit
mm
Degrees
mm
mm
Unit
mm
mm
mm
Degrees
Degrees
mm
mm
Unit
mm
mm
mm
mm
mm
Degrees
335