HEIDENHAIN TNC 426 (280 476) Pilot - Manual (Page 20)

21
Path Functions
Circular Path Around the Circle Center CC
Coordinates of the circle center CC
Coordinates of the arc end point
Direction of rotation DR
C and CP enable you to program a complete circle in one block.
With cartesian coordinates:
With polar coordinates:
5 CC X+25 Y+25
6 L X+45 Y+25 RR F200 M3
7 C X+45 Y+25 DR+
18 CC X+25 Y+25
19 LP PR+20 PA+0 RR F250 M3
20 CP PA+180 DR+
• Define the pole CC before programming polar coordinates!
• Program the pole CC only in Cartesian coordinates!
• The pole CC remains effective until you define a new one!
• The arc end point can be defined only with the polar
coordinate angle (PA)!