problem with g71

[redfoxbody11]

hello all im currently uing a kia superturn 28 with a fanuc controller and ive run into a problem regarding trying to cut an inverse angle using a g71 canned cycle. for ex (cutting / as opposed to \). first ill show you my trial program then explain what it is doing.

N1;
G40;
G28 U0;
G0 T0101;
G50 S1500;
G96 S400 M3;
G0 X5.1 Z0.05 M8;
G71 U0.075 R0.01;
G71 P101 Q102 U.01 F.01;
N101 G0 X4.98;
G01 G42 Z0.0;
G03 X5.0 Z-0.01 R.01;
G01 Z-0.125;
X4.0 Z-4.0;
X5.1;
N102 G0 G40 Z0.05
X10.0 Z10.0
G28 U0;
M0;

Basically instead of breaking up the machining of this piece up into the depth of cut specified (0.075) it tries to cut the whole angle at once. I had someone tell me to add a Z0.05 on the N101 line and removing the Z on the N102 line he got it to work on his machine. he was using a HASS. i tried that myself but i kept getting an illegal g code alarm. if anyone knows how to accomplish this on a kia it would be greatly appreciated. as of now i use that canned cycle but manually change the offset on the X geometry of the tool being used and make my own depth of cuts. on smaller pieces i use a g72 canned cycle with a groove tool to do such an angle. there must be a way to get a turn tool to do this on my kia. any insight on this matter would be greatly appreciated.

[dcoupar]

hello all im currently uing a kia superturn 28 with a fanuc controller and ive run into a problem regarding trying to cut an inverse angle using a g71 canned cycle. for ex (cutting / as opposed to \). first ill show you my trial program then explain what it is doing.

N1;
G40;
G28 U0;
G0 T0101;
G50 S1500;
G96 S400 M3;
G0 X5.1 Z0.05 M8;
G71 U0.075 R0.01;
G71 P101 Q102 U.01 F.01;
N101 G0 X4.98W0;
G01 G42 Z0.0;
G03 X5.0 Z-0.01 R.01;
G01 Z-0.125;
X4.0 Z-4.0;
X5.1;
N102 G0 G40 Z0.05
X10.0 Z10.0
G28 U0;
M0;

Basically instead of breaking up the machining of this piece up into the depth of cut specified (0.075) it tries to cut the whole angle at once. I had someone tell me to add a Z0.05 on the N101 line and removing the Z on the N102 line he got it to work on his machine. he was using a HASS. i tried that myself but i kept getting an illegal g code alarm. if anyone knows how to accomplish this on a kia it would be greatly appreciated. as of now i use that canned cycle but manually change the offset on the X geometry of the tool being used and make my own depth of cuts. on smaller pieces i use a g72 canned cycle with a groove tool to do such an angle. there must be a way to get a turn tool to do this on my kia. any insight on this matter would be greatly appreciated.

You'll need to specify an X and a Z (W also works) move in the N101 to specify a type II roughing cycle.

[redfoxbody11]

The addition of a Z or W on the start line continued to alarm the machine out. Keeps telling me illegal use of gcode alarm. Could it b this machine is too old?

[redfoxbody11]

I'm using a t of 3 for the tool being used on the geometry offset page could this b why? Other then that I'm running out of ideas.

[redfoxbody11]

Tried the same program on one of our newer machines a super kia turn 15lms and it worked like a charm. Any idea why it wouldn't work on the other machine.?

[dcoupar]

Have you ever run a G71 - G76 on the machine? Maybe the option isn't turned on?

[redfoxbody11]

Yes I have ran g71 g72 g74 g75 and g76 on this machine. taking out the z on the first line runs the program but all in one shot. Adding the z causes an alarm on this machine. U may b right, perhaps a key parameter is not turned on in this machine.

[dcoupar]

What model Fanuc is it?

[redfoxbody11]

21-t