G41 issue

[bspear]

Fanuc 0i MD
Bridgeport/Hardinge GX600 VMC


Treat me gently, new to Fanuc mill.....


No conversational on this machine, machining a hex, tool heading off to unpredictable positions?


clockwise climb mill
10mm dia cutter
hex ct 0,0
D1=10


G56;
M6 T1;
G43 H1;
M3 S1500;


G0 X30 Y0;
Z-5;
G41 D1;
G1 X10.97 Y0 F100;
X5.48 Y-9.5;
X-5.48 Y-9.5;
X-10.97 Y0;
X-5.48 Y9.5;
X5.48 Y9.5;
X10.97 Y0;
G40;
G0 X30 Y0;


What am I missing? Is it 'cause the shortest length is close to the cutter dia?


Cheers, bspear

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[sinha_nsit]

Looks ok.
Can you show the obtained toolpath? At least a rough sketch.
Dia is not an issue in outward machining of a contour.

[generaldisarray]

1.0 Inch hex 1/2 endmill. Control comp.

O1000
G20
G0 G17 G40 G49 G80 G90
(1/2 FLAT ENDMILL|TOOL - 1|DIA. OFF. - 1|LEN. - 1|TOOL DIA. - .5)
T1 M6
G0 G90 G54 X-.6 Y1.7 A0. S1000 M3
G43 H1 Z.25
M8
Z.05
G1 Z-.5 F20.
G41 D1 Y1.1 F10.
G3 X0. Y.5 I.6 J0.
G1 X.2887
X.5774 Y0.
X.2887 Y-.5
X-.2887
X-.5774 Y0.
X-.2887 Y.5
X0.
G3 X.6 Y1.1 I0. J.6
G1 G40 Y1.7
G0 Z.25
M5
G91 G28 Z0. M9
G28 X0. Y0. A0.
M30

pictures from Mastercam. The backplot traces tool center, dont let that fool you.