Need help with a 5ax undercut

[johnc4668]

Fellas,

Using a Line projection toolpath for this part and its missing a section that a need cut. I would like it consistent over the whole undercut area instead of jumping up on that flat area. I have it tipped on 25deg to avoid collisions. I tried rotary finishing also with the same result also. See pic, thanks!

[icse]

Did you tryed this?

Strategy:

IMPORT TEMPLATE ENTITY TOOLPATH TMPLTSELECTORGUI "Finishing/Projection-Surface-Finishing.ptf"

parameter:

EDIT TOOLAXIS TYPE VERTICAL

edit par 'ToolAxis.FixedAngle.Value' "75"

[johnc4668]

still have the same result- not sure why it doesnt want to walk up that area!

[evo80]

Have you tried creating a single surface of that entire area and then use a surface finishing strategy? 

[TK.421]

i was also going to suggest surface projection or maybe flowline if that doesnt work? is that radius a nice size that a swarf will clean it all up if you do a swarf toolpath?

[johnc4668]

heres the project guys if you need to see whats going on.

https://autode.sk/3FXPGD4

[johnc4668]

that rad is a .092, using a .125 ball to cut it

[TK.421]

dude, i spent way longer on this than i should have... the flow line i got to calculate is garbage, the flow line i wanted to do didnt calculate. I went in powershape and made a single surface and used surface finishing with a towards line tool axis and some auto collision avoidance and that seems to have done the trick. I cleared out a bunch of stuff to make the project lighter cause i had to kill it and reload a bunch of times, but here's what I came up with. hope this is useful for you. let me know what you end up doing!

[johnc4668]

You rock! I owe you a beer or 3! I actually got it to work a few hours ago using line projection and setting it to linear- whatever- it should work. I will take a look at this project soon, thanks!

[TK.421]

sounds good! i actually thought about line projection but i always forget there are other settings that will change how the tool steps over so i dismissed it. what material is this being made out of?

[johnc4668]

Just soft p-20. I never use surface machining that much. It only lets you select one surface. How do you grab more than one surface and have powermill think its 1 surface?

[TK.421]

i copied all the surfaces into powershape, made a curve from a cross section and then revolved a single surface. 

[iamcdn79]

https://www.autodesk.com/support/technical/article/caas/sfdcarticles/sfdcarticles/How-to-append-mult...

[johnc4668]

Watched that video and almost got it but not quite- does this only work with grabbing 2 surfaces and joining them together? Im trying to do 3 and having trouble. 

[iamcdn79]

I've appended 8 surfaces into 1 last month. There could be a gap between the surfaces or they could be overlapping.