advise on tool axis control - Parallel

[lowcountrycamo]

We do aerospace parts.  A family of parts I am about to do have .125 wall and floor radius.  I am looking for a path that will clean up both in one smooth pass with a 10 degree tapered end mill. I found that Parallel will get close but the tool axis does not stay true to the wall the entire path.  I am using lines at both ends.  The angle is correct at the corners but when transitioning between the 2 it pulls off due to geometric laws.  I found that if I did half of the wall at once with 1 axis line it does clean up.    I attached a file.  Can anyone think or a better way to do this?  

Thank you,

Steve A

 

 

fillet and wall clean up.mcam

[Colin Gilchrist]

I would try SWARF for that.

[huskermcdoogle]

Couple of options:

Add a tilt line in the middle, but it still might not get you what you are looking for.  You may need to add a bunch of tilt lines.

Use from chain instead, and see what you get.  Still might not work, but might be closer.

Using SWARF is probably the best idea.

[Colin Gilchrist]

This may be a silly question, by why would you want to use a 10 degree tapered tool? The radius of the tool increases, the further you get from the tip of the tool. You can hit the floor radius with this tool, but you'll never generate the corner radius between the walls, unless you run the tip of the tool, up the wall intersections.

I'd probably use a .375 ball to rough that out, and a .250 ball to finish the floors/walls. The problem with the .250 ball, is that you'll really have to slow down in the corners to prevent chatter. I think the ideal finish ball endmill would be a 6mm tool. You'd have to make a couple passes to generate the radius between the floor and wall, but at least you could swing a .0069 radius in the wall corners...

[lowcountrycamo]

36 minutes ago, Colin Gilchrist said:

This may be a silly question, by why would you want to use a 10 degree tapered tool? The radius of the tool increases, the further you get from the tip of the tool. You can hit the floor radius with this tool, but you'll never generate the corner radius between the walls, unless you run the tip of the tool, up the wall intersections.

I'd probably use a .375 ball to rough that out, and a .250 ball to finish the floors/walls. The problem with the .250 ball, is that you'll really have to slow down in the corners to prevent chatter. I think the ideal finish ball endmill would be a 6mm tool. You'd have to make a couple passes to generate the radius between the floor and wall, but at least you could swing a .0069 radius in the wall corners...

I am trying to run the tool up and down the walls to get the rad there.   I might end up with a .250 ball but looking for a better solution.