Strange c-axis face drilling

[meconer]

Hello

 

I have a strange issue with my homemade post for Index G200. I tried to drill three holes in the face of a part with c-axis face drill. We don't use canned cycles for this. If I set rotary axis to Y I get correct code for the drilling. But If I set it to C-axis the drilling on the second hole and forward gets split up into several steps, each about 1,1 mm long. It looks like this:

 

N340 G0 Z2.

N350 C180.

N360 G1 Z.824

N370 Z-.349

N380 Z-1.522

N390 Z-2.697

N400 Z-3.876

N410 Z-5.063

N420 Z-6.261

N430 Z-7.47

N440 Z-8.694

N450 Z-9.347

N460 Z-10.

N470 G0 Z2.

 

The first hole is correct. Has anybody seen this before? Is this a bug or? I checked the nci file for both cases and they are identical except for the rotary axis setting code.

 

Mats

[gcode]

Try posting with a generic mill/turn post and see what you get. If it posts properly, you have a problem with your custom post.

 

also

 

try breaking the opertaion into multiple ops

drilling one hole per operation.

[Reece L Gibson]

I have seen this before, imported file right?

[meconer]

I'll check it out next time I have time to work on the post. The file is made in v9 from te beginning. I'll try the same on a new file also.