[dcoupar]

Anybody have problems with G71 on a Yasnac LX3 Control? Here's a sample program....

O0004;
N001 G40 G20;
N002 G50 S3500;
N003 G96 S500 M3;
N004 G41 T0505;
N005 G0 X1.15 Z-9.5 M8;
N006 G71 P7 Q14 U.01 W.01 D.015 F.005 S500 R1; <-- Add R1 here
N007 G0 X.125 S750;
N008 G1 W-.2 F.004;
N009 G12 X1.0625 K-.09375;
N010 G1 W-.85;
N011 G2 X.7625 W-.15 I0.0 K-.15;
N012 X1.0265 W-.15 I.15 K0.0; <---- Should this be X1.0625 not X1.0265?
N013 G1 W-.975;
N014 X1.15;
N015 G70 P7 Q14;
N016 G0 G40 X8.0 Z-4.0 M9;
N017 M30;

It runs ok till somewhere's near 'N009' during the finish cut (G70)..... then throws "Alarm 048" which is "PROG ERROR (G41-44) INTERSECTION POINT NOT OBTAINED BY INTERSECTION COMPUTATION".... What am I overlooking???

What does this shape look like?
I think there may be a typo in N012... X1.0625 and W0?


Then on another related problem....
Every time I try to cut a concave profile (diameter steps down then back out) on a part using G71 it takes the concave in one pass....

I believe you need to specify a Type II roughing by putting an R1 in the G71 block.

[drdfab]

Thanks abunch..... the "R1" did the trick on the 'plunging to the bottom first pass' problem....

But it still throws the alarm code 048 about one block before the G2 area during the finishing cut (G70).... So why would the control be able the rough out the part (even the radius) and not be able to finish it???

[drdfab]

By the way..... the typo in my program was my mistake in typing here online.... it really is correct in my control.... it should read X1.0625 as dcoupar pointed out....

I am trying to cut a full radius groove (.150" radius x .150" deep) on my shaft... not sure if this helps any.... :-)

[dcoupar]

Thanks abunch..... the "R1" did the trick on the 'plunging to the bottom first pass' problem....

But it still throws the alarm code 048 about one block before the G2 area during the finishing cut (G70).... So why would the control be able the rough out the part (even the radius) and not be able to finish it???

Maybe I'm reading it wrong, but I would think the G41 in N004 should be G42. I believe G41 and G42 are ignored during the G71 roughing.

[drdfab]

Maybe I'm reading it wrong, but I would think the G41 in N004 should be G42. I believe G41 and G42 are ignored during the G71 roughing.

The funny thing is that the program won't run any different even without tool nose comp..... still just throws the same alarm same place..... :-(