Continue to Site

Eng-Tips is the largest engineering community on the Internet

Intelligent Work Forums for Engineering Professionals

  • Congratulations IRstuff on being selected by the Eng-Tips community for having the most helpful posts in the forums last week. Way to Go!

NX 5-Axis Post: Wrong length compensation value

Status
Not open for further replies.

evanser89

Industrial
Feb 27, 2015
2
Hi all, I am trying to adapt the pre-configured sim05 Fanuc post processer for use on our CMS 5-axis mills with dual rotary heads. I have a problem I could use some help resolving:

I am doing a 3D profile operation, and at first I was seeing G68 IJKR output which is weird because I never specified a plane change; we also never run canned cycles, so IJKs should never show up in the post anyways...
If I run only this operation it simulates fine, but if this operation comes AFTER another operation it crashes, so I suspected it was somewhere in the First Move. I removed all of the junk Siemens included and now it runs without the G68 IJKR, except it still includes the wrong G43 (should be G43.4), followed by a G49 I don't want.
I have changed the Length Compensation output to G43.4, and set it to force output everywhere I saw it, but when running the machine code simulator I still see a G43 output followed by a G49 at the start of my second operation. What can I do to get the right length compensation code output, and get ride of that comp cancel command!?
Link
 
 http://files.engineering.com/getfile.aspx?folder=77c2ef7c-750d-456b-8f58-659876c86af9&file=Length_Adjust.JPG
Replies continue below

Recommended for you

I did a few more tweaks, I get my G43.4 and everything moves correctly! I changed the First, Initial and Rapid Move length comps from the automatically selected (should be G43.4) to user defined 43.4.
 
Status
Not open for further replies.

Part and Inventory Search

Sponsor