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afalzate
366 Views, 4 Replies

Specify an exit path in a 3 axis mill

I am using a 3 axis mill and a key seat cutter with a small neck.
I am undercutting and I wish there was a way to specify an exit path when finished. As you could imagine, when the current strategy is done from the pictures, it moves out vertically and could damage the tool or part with the final retract. One solution I found before was adding a large Lead in/Out horizontal radius but that consumes a lot of unnecessary time cutting air between the roughing cuts. My final solution was just manually adding a linear move in the G Code by hand after posting, but I wish there was a way to fix this in the source file.

 

undercut problem 2.PNGundercut problem 3.PNGundercut problem.PNG

Labels (4)
a.laasW8M6T
in reply to: afalzate

I assume your using a 2d contour?

If you turn on stock contours in the geometry tab and pick a contour that matches the extent of the part you want to avoid, fusion will add the appropriate extension to the paths to avoid a collision,

 

if you share the file I can show an example

afalzate
in reply to: afalzate

This worked perfectly thank you so much :slightly_smiling_face: 

a.laasW8M6T
in reply to: afalzate

Be aware you can sometimes get funny behavior with the lead-ins doing weird stuff(with stock contours turned on), like going along the side of the part for a distance, or crossing over a surface, the easiest way to fix this is to turn off lead ins in the linking tab, Fusion will still move the cutter away to avoid the stock, it just wont have any horizontal or vertical radii going in.

seth.madore
in reply to: a.laasW8M6T


@a.laasW8M6T wrote:

Be aware you can sometimes get funny behavior with the lead-ins doing weird stuff(with stock contours turned on), like going along the side of the part for a distance, or crossing over a surface, the easiest way to fix this is to turn off lead ins in the linking tab, Fusion will still move the cutter away to avoid the stock, it just wont have any horizontal or vertical radii going in.


Which is not going to work if you need to use cutter compensation. Another method that works quite well is Tangential Extension, with "Separate Tangential Extension" enabled. You can adjust to your heart's content via that method AND retain your smaller lead in/out moves


Seth Madore
Customer Advocacy Manager - Manufacturing