Heidenhain CNC Pilot 4290 V7.1 Description of B and Y axes User Manual download pdf (Page 58)

1.11 DIN PLUS (Y Axis): Milling Cycles

G845 (Y axis) – Milling

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

the “machining direction Q” and the direction of tool rotation (see

table G845 in the User's Manual). Program only the parameters given

in the following list.

See also:

 G845—Fundamentals: Page 56

 G845—Calculating hole positions: Page 57

Parameters—milling

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 (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):

 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)

Starting with software version 625 952-05: F is used as

machining feed rate for reciprocating or helical plunging.

E Reduced feed rate for circular elements (default: current 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)

Q Machining direction (default: 0)

 Q=0: From the inside toward the outside

 Q=1: From the outside toward the inside

A Sequence for “Milling”: A=0 (default=0)

NF Position mark—reference from which the cycle reads the hole

positions [1 to 127].

O Approach behavior (default: 0)

Plunge vertically O=0: The cycle moves the tool to the

starting point; the tool plunges at the feed rate for infeed and

mills the pocket.

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Heidenhain CNC Pilot 4290 V7.1 Description of B and Y axes User Manual Page 58