HEIDENHAIN TNC 426 (280 476) Pilot - Manual (Page 21)

22
Path Functions
Arcs 1 and 2 Arcs 3 and 4
10 L X+40 Y+40 RL F200 M3
Arc starting point
11 CR X+70 Y+40 R-20 DR-
Arc 3 or
11 CR X+70 Y+40 R-20 DR+
Arc 4
Circular Path with Known Radius (CR)
Coordinates of the arc end point
Radius R
If the central angle ZW > 180, R is negative.
If the central angle ZW < 180, R is positive.
Direction of rotation DR
10 L X+40 Y+40 RL F200 M3
Arc starting point
11 CR X+70 Y+40 R+20 DR- Arc 1 or
11 CR X+70 Y+40 R+20 DR+ Arc 2