Heidenhain CNC Pilot 4290 V7.1 Description of B and Y axes User Manual download pdf (Page 52)

1.11 DIN PLUS (Y Axis): Milling Cycles

1.11 DIN PLUS (Y Axis): Milling

Cycles

Area milling—roughing G841

G841 roughs surfaces defined with G376 Geo (XY plane) or with G386

Geo (YZ plane). The cycle mills from the outside toward the inside. The

tool moves to the working plane outside of the workpiece material.

Parameters

NS Block number—reference to the contour description

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

I Oversize in X direction

K Oversize in Z direction

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

(default: 0.5).

Overlap = U*milling diameter

V Overrun factor. Defines the distance by which the tool should

pass the outside radius of the workpiece (default: 0.5).

Overrun = V*milling diameter

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

J Retraction plane (default: back to starting position)

 XY plane: Retraction position in Z direction

 YZ plane: Retraction position in X direction (diameter)

Oversizes are taken into account:

 G57: Oversize in X, Z direction

 G58: Equidistant oversize in the milling plane

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).

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.”

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Heidenhain CNC Pilot 4290 V7.1 Description of B and Y axes User Manual Page 52