lathe insert tip comp Question

[Mike@Dive Lab Inc.]

Hey everyone, I don't have much time at all on Mcam lathe, When I generate my rough tolpath to cut a x1.5 step z-.600 back w/ a .312 radus on 2.0" 360 brass hex stock , The rough toolpath in backplot and verify both keep overcutting on each pass on the radius with a specified insert tip of .031.The finish pass seems to be cutting fine (am using same tool). If I change the tip R. to 0 it seems to cut fine, what am I missing ?,Overlap settings? Tool Comp Type? Ive tried everything I can think of.

 

Thanks for the help, this is an awesome site!!!

[chris m]

email me the file and I'll have a look

 

C

[notso]

I have run into the same thing before. It seems like I just set the tool comp to "computer" for the rough pass and that fixed it. On another occasion I just redrew the geometry (read started over from scratch) and it was magically fixed.

[notso]

addon to above post: On another occasion... On that occasion the rough tool seemed to overcut no matter what tool comp option I tried. But when I redrew the part (simple geom luckily) everything worked perfectly.

[Mike@Dive Lab Inc.]

Hey Chris, I am having trouble with my e-mail I don't think the file made it to you. If not I'll keep playing and let you know my results

 

thanks

 

mike

[chris m]

I didn't get it yet, Mike

 

You can also put it on Jay's ftp site [just follow the ftp instructions at the top of the page] and we can see it from there

 

C

[chris m]

Mike

 

I fooled around with your file a little but stock flip files are a royal PITA to edit because the stock flip op F--Ks everything up when you start manipulating. If I get 1/2 hour tonight I'll create a new file for your part and send it to you to show you what I think a 'normal' lathe file should look like. I tried to call you at around noon but the woman who answered the phone said you "weren't in the facility". Some of your tool definitions are a little odd so I'd like to talk to you before I do what I need to do; gimme a call if you can.

 

C