Toolpaths-Threadmill

[ChrisD]

Good Morning.

This is the situation: I did a THREADMILL toolpath on mill8 for one of our horizontal mill centres and encountered a problem with using the T|C Planes option. I chose the 'Origin' by using a predetermined point in the geometery, and used the Front Toolplane. Afterwards when posting, i noticed that, (in the nc code), that the first position that the tool goes to is wrong. It is actually the point on the T/C

plane that I've chosen.

eg.

GOO G90 G154 J3 "X-3.8677 Y-1.5006" S15000 M3

(this is the code that we use for our horizontal)

 

After this line the proper x and y values are spit out

eg.

G43 Z3. H1 M8

"X-.1161" Y-1.5006

The "X-.1161" is the proper position for the tool to goto. I'm thinking that this is a post issue. Does anyone have any tips on how to fix this. Please keep in mind that I am using an old post (ver3 I think) that has been modified to suit our machines. Do I have to modify the old post to recognize the new "threadmill" opcode?

Thanks in advance

Chris DiNardo

 

 

[Allan Brown]

Your question is fairly specific and most likely relates directly to you post and how it handles approach moves. You could confirm that it is your post by running the file through Mpfan. If the XYZ values are fine, then your post is to blame.

This is may be a good example of where your reseller should be able to help you if you email your Mc8 file and post (pst/txt) directly to them.

[This message has been edited by Dave Thomson (edited 11-21-2000).]