Lathe help

[elee]

I am trying to create my first toolpaths with Fusion 360.  For some reason it dives in towards the center at the ends of the part and no matter what setting I change it doesn't seem to change it.  I thought it was either a clearance setting or a lead in or out setting but nothing seems to change it.  I am trying to set up a toolpath for the Penn State pens and I can't have it dive towards the center because it will cut into the steel rod holding the part.  Please advise.

[seth.madore]

Would you be able to share your Fusion file here?
File > Export > Save to local folder, return to thread and attach the .f3d/.f3z file in your reply.

[elee]

I attached my file 

[seth.madore]

Hmm, I'm not seeing it here 🤔

[elee]

Lets try again.

[seth.madore]

Set your Geometry settings to this:

 

Result:

 

[elee]

Much better, thank you!

[elee]

I don't know if you saw it but I also had an error on the finishing pass. It says "Lead-out has been modified due to a gouge with the remaining stock".

[seth.madore]

That warning will go away if you turn on "Allow Lead-out to cut Stock", found on the last tab. 

 

[elee]

Well everything looks good, no cautions but it fails to post out now.

[seth.madore]

What post processor are you using?

[elee]

Centroid post.  It posted out before I made the suggested changes; now I get no errors or warnings but now it won't post out.

[seth.madore]

First off, I do want to make sure that you're using the Lathe post and not the Milling post. LINK to post processor

Secondly: you have the Setup set to "Secondary Spindle". Does your machine have a main and a sub spindle?

Setting it to Primary Spindle (in the Setup) and selecting the Centroid Turning post processor, I get this:

 

[elee]

So I am making progress.  I changed the selector for cutting speed and feedrate to accommodate the way that I program and/or read code.  There are two problems I am still having.  First is that at the very beginning of the code it is programming a Speed of 6000 even though I don't see anywhere in the program that I told it 6000. Then for the rest of the code it shows S2000 which is what I put in.  Secondly, I can't figure out if it is posting out in diameter or radius.  As it starts the program, the Z values are fine but when it pulls back to the clearance point it trips the X limit switch.  The x value in the code is 1.55 but it appears to be pulling out around 3 inches from the centerline.

[seth.madore]

For the first issue, it sounds like it's your max RPM setting in your NC Program tab:

 

For the second issue, is this something you can change on your control by changing a parameter to be diameter instead of radius? Otherwise, it's going to be a post processor edit

[elee]

So I changed the settings in the lathe controller to read diameter.  Unfortunately that didn't fix the problem.  I am trying to work with the manufacturer now to see if we can figure out the issue.