User's Manual TNC 360 (from 259 900-11) - heidenhain

5 Programming Tool Movements
5.4 Path Contours – Cartesian Coordinates
TNC 360
Direction of rotation DR and arc shape
This direction of rotation determines whether the arc is
• convex (curved outward) or
• concave (curved inward)
To program a circular arc with defined radius:
CR
COORDINATES?
e.g. X 1 0
e.g.
Y 2
CIRCLE RADIUS (SIGN)?
+/
5
+/
ROTATION CLOCKWISE: DR-?
1x or 2x
ENT
+/
If necessary, enter also:
• Radius compensation
• Feed rate
• Miscellaneous function
Resulting NC block: CR X+10 Y+2 R–5 DR– RL
ENT
ENT
Fig. 5.29: Convex path
RL,DR–,(R0)
Fig. 5.30: Concave path
Enter the coordinates of the arc end point, for example X = 10 mm, Y
= 2 mm.
Enter the arc radius, for example R = 5 mm; and determine the size
of the arc using the sign, here the negative sign.
Define the circular arc with a negative (DR–) or positive direction of
rotation (DR+).
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