HEIDENHAIN TNC 360 User Manual - Manual (Page 105)

5-21 TNC 360
5 Programming Tool Movements
Fig. 5.29: Convex path
Fig. 5.30: Concave path
5.4 Path Contours – Cartesian Coordinates
+/ +/
CR
1x 2x
+/ 5 e.g.
ENT
or
X e.g.
1 0
To program a circular arc with defined radius:
COORDINATES?
Enter the coordinates of the arc end point, for example X = 10 mm, Y
= 2 mm.
CIRCLE RADIUS (SIGN)?
Enter the arc radius, for example R = 5 mm; and determine the size
of the arc using the sign, here the negative sign.
ROTATION CLOCKWISE: DR-?
Define the circular arc with a negative (DR–) or positive direction of
rotation (DR+).
If necessary, enter also:
• Radius compensation
• Feed rate
• Miscellaneous function
Resulting NC block: CR X+10 Y+2 R–5 DR– RL
Y 2
ENT
ENT
RL,DR–,(R<0)
RL,DR+,(R>0)
Direction of rotation DR and arc shape
This direction of rotation determines whether the arc is
• convex (curved outward) or
• concave (curved inward)