Heidenhain CNC Pilot 4290 V7.1 Description of B and Y axes User Manual download pdf (Page 61)

HEIDENHAIN CNC PILOT 4290 61

1.11 DIN PLUS (Y Axis): Milling Cycles

Pocket milling—finishing G846 (Y axis)

G846 finishes closed contours defined in the XY or YZ plane in the

program sections:

 FACE_Y

 REAR_Y

 LATERAL_Y

You can change the cutting direction with the “cutting direction H,”

the “machining direction Q” and the direction of tool rotation.

Cycle run

1 Starting position (X, Y, Z, C) is the position before the cycle

begins.

2 Calculate the proportioning of cuts (infeeds to the milling planes,

infeeds in the milling depths) and the plunging paths for

reciprocating or helical plunges.

3 Move to the safety clearance and plunge to the first milling depth.

4 Mill the first plane.

5 Retract by the safety clearance, return and cut to the next milling

depth.

6 Repeat steps 4 and 5 until the complete area is milled.

7 Return to “retraction plane J.”

Parameters—Milling

NS Block number—reference to the contour description

P (Maximum) milling depth (infeed in the working plane)

R Radius of approaching/departing arc (default: 0)

 R=0: The contour element is approached directly; Feed to

the starting point above the milling plane, then vertical

plunge.

 R>0: Tool moves on approaching/departing arc that

connects tangentially to the contour element.

U (Minimum) overlap factor. Defines the overlap of milling paths

(default: 0.5).

Overlap = U*milling diameter

V Overrun factor if the milling contour lies partly outside the

turning contour:

 0: The defined contour is milled completely

 0 < V <= 1: Overrun = V*milling diameter

H Cutting direction (default: 0)

 H=0: Up-cut milling

 H=1: Climb milling

F Feed rate for infeed (default: active feed rate)

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Heidenhain CNC Pilot 4290 V7.1 Description of B and Y axes User Manual Page 61