Heidenhain CNC Pilot 4290 V7.1 Description of B and Y axes User Manual download pdf (Page 50)

1.10 DIN PLUS: Linear and Circular Paths

Milling: Circular movement G2, G3—incremental

center coordinates

G2/G3 moves the tool in a circular arc at the feed rate to the “end

point.”

The execution of G2/G3 varies depending on the working plane:

 G17 Interpolation in the XY plane

 Infeed in Z direction

 Center definition: with I, J

 G18 Interpolation in the XZ plane

 Infeed in Y direction

 Center definition: with I, K

 G19 Interpolation in the YZ plane

 Infeed in X direction

 Center definition: with J, K

If you do not program the center, the CNC PILOT automatically

calculates the possible solutions for the center and chooses that point

as the center which results in the shortest arc.

Parameters

X End point (diameter)

Y End point

Z End point

I Incremental center point (radius)

J Incremental center point

K Incremental center point

R Radius

Q Point of intersection. End point if the line segment intersects

a circular arc (default: 0):

 Q=0: Near point of intersection

 Q=1: Far point of intersection

B Chamfer/rounding. Defines the transition to the next contour

element. When entering a chamfer/rounding, program the

theoretical end point.

 No entry: Tangential transition

 B=0: No tangential transition

 B>0: Rounding radius

 B<0: Chamfer width

E Special feed factor for the chamfer/rounding (default: 1)

Special feed rate = active feed rate * E (0 < E <= 1)

Programming X, Y, Z: Absolute, incremental or

modal or “?”

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Heidenhain CNC Pilot 4290 V7.1 Description of B and Y axes User Manual Page 50