Helical Ramp Toolpath

[steve@boroUK]

Hello

I am wanting to machine the outside of the profile in the attached file using a helical ramp toolpath if possible. Does anyone know if ths can be done in Bobcad?

The stock is 3 3/4" stainless 316L. I am currently machining in 1mm deep steps, to a depth of 65mm, at 2000 rpm and 3000mm/min feed with a 5 tip, 32mm dia tool, but each feed in gives me a "hard" entry, & shortens the life of the tips.

Thanks in advance

[BurrMan]

Here is a link with a file in it where John created a path like this:

http://www.bobcadsupport.com/forum/s...89&postcount=6

There can be some other methods like using the HSP and creating a pocket that will provide the ramped toolpath in a single stroke.

[steve@boroUK]

Thanks BurrMan,

Managed to get the tool ramping down almost as I want, It travels 360 deg anti-clockwise, then 360 deg clockwise, until it reaches the bottom of the part, and I am saving about 1min. per run.

I asked Bobcad about HSP, but thes suggested it wasn't suitable for the part.

[BurrMan]

Yeah the profile feature doesnt do ramping so all the suggestions will be "ways to make it work" kind of things. I dont have any good suggestions but I have seen others do this with different methods.

[steve@boroUK]

Read the posts the link you provided & produced a z-level finish toolpath, worked perfectly using ramp entry and s-links, lost a further minute