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Bobcad 31 Hurco lathe post radius problems

TRussell

Aluminum
Joined
Mar 17, 2015
I'm trying post code for a spherical radius using Bobcad 31, and I'm getting some pretty funny stuff. I figured out how to edit the post, but I'm not sure what the code is supposed to look like. The code that I'm posting cuts the ends of the sphere small.

One pic shows what I'm getting now, one pic shows my first try, where I got an almost segmented surface. I changed the CAD and CAM tolerances in the part setting menu, and that gave me a smooth surface, but the ends are small. I ran only the roughing operation, and that seems fine.

The last pic is what I need to end up with. Any help would be much appreciated.

Here's the code for the finish pass

E1
N1 T00
N2 G00 G08 G20 G40 G80 G90 G95
(PROGRAM NAME - BEARING BALL.HNC)
(DATE - THU. 08/30/2018 , TIME - 03:03PM)
(POST - HURCO WINMAX CYCLES)
( )
( FIRST OPERATION - FIRST TOOL)
( (MACHINE SETUP - 1-FEATURE LATHE TURNING-BASIC FINISH))
(TOOL #7 VBMG - 0.0156 RAD - 0.1875 THK)
N3 G90 T0707
N4 G92 S2000
N5 G96 S500 M03
N6 G00 Z.0996 M08
N7 X4.
N8 X2.2003
N9 X1.26
N10 G01 X1.2413 Z0. F.003
N11 X1.2394 Z-.0103
N12 G03 X1.6681 Z-.5268 I-1.2706 K-.5663
N13 G03 X1.6564 Z-.5399 I-.0311 K-.0009
N14 G02 Z-.6133 I.0584 K-.0367
N15 G03 X1.6681 Z-.6264 I-.0194 K-.0122
N16 G03 X1.2839 Z-1.117 I-1.6993 K.0498
N17 G01 X1.7003
N18 X1.8418 Z-1.0463
N19 G00 X2.2003
N20 X10.
N21 Z5.
N22 M09
N23 G90 M05
N24 G53
N25 T0700
N26 M30
%
 

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Most likely an issue of BNC vs ISNC. Your machine is probably running one while the post is outputting for the other.
 
Thanks for responding goooose. I found something on the HURCO website and changed some settings. I'm going to try this again.
 
Well, I found the NC settings in the HURCO control,and tried them all.
It still didn't work. I may have to pay for support. I just assumed that the posts Bobcad have on their website worked.
 
Well, I found the NC settings in the HURCO control,and tried them all.
It still didn't work. I may have to pay for support. I just assumed that the posts Bobcad have on their website worked.

Try posting with R instead of I/K. When I looked at the numbers the I/K's looked off compared to what I would expect for a Fanuc control. Note, assuming your geometry and toolpath have been created correctly here.
 
That worked gooose, thanks a lot. I'm out of my depth when it comes to setting up posts. Thank God it isn't necessary too often.
 








 
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