Lead In move cuts into part

[tuckerT674Q]

I have a ID pocket and OD contour that uses lead in and is cutting into the part. I am using cutter comp so I can control tolerances in the controller of the machine. I do not have wear control as an option.

Fusion 360 shows the machine moving correctly, but the machine previewer shows what the machine actually does and it cuts into the part.

The issues is only on the initial lead in. The rest of the contour runs fine.

I have uploaded just the ID contour(as I am limited to my file uploads) program.

I am leaning towards my Post being the problem when fusion generates the G code.

Any assistance would be great.

My machine: Bridgeport Discovery SX-15.

Post Processor: Bridgeport/ Bridgeport V43725

[Spencer.AC]

Is there anyway for you to upload the part file? It's hard to tell what the issue might be without being able to look at your toolpath settings. Part of the problem might be that your controller needs something like 3x the radius distance to engage cutter comp. You could try a smaller tool and it would need less space to engage. I can't really say more without the fusion file. Hope this helps.

[tuckerT674Q]

I have attached the original part file used to create the code. Let you can see it in  T16, 2D Contour4 the ID profile that I am trying to cut.

Let me know if you can't preview the part.

[Spencer.AC]

Okay, I've looked at your file and I think I  have an answer as well as a question. Firstly, what material are you cutting? Secondly, try using a bore operation for the thru hole in the middle of your part, 2D contour is not the ideal toolpath for that feature. I attached a screenshot of the toolpath with the passes tab open so you can see the settings I used.

[tuckerT674Q]

I am milling Stainless Steel.

I can see using a boring cycle, but the lead in problem happens with the outer perimeter as well as the pocket I am trying to cut.

[brad_francola]

I dumped your code into NC viewer and this is what it looks like:

[brad_francola]

You may want to try Wear as the compensation type.  On your control, you'll start with ZERO for the geometry diameter of the tool.  You'll only need to enter a small amount into the diameter wear to adjust the cut to size.  Wear type of compensation adjusts the toolpath for the size of the cutter but it still outputs the G41/G42 for adjustment.

[brad_francola]

I also see you have a lot of NC Programs.  Two things you may find useful.  First, once you've created an NC program, you can just go back to it (edit if you want to) and re-post.  Something else that you may like to know, you don't have to create an NC Program every time you post process.  If you uncheck the Create In Browser box, you won't add the NC Program to the browser.