topic Re: Need help with a 5ax undercut in PowerMill Forum

Need help with a 5ax undercut

johnc4668 — Wed, 15 Nov 2023 14:38:12 GMT

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!

Betreff: Need help with a 5ax undercut

icse — Wed, 15 Nov 2023 15:02:33 GMT

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"

Re: Need help with a 5ax undercut

johnc4668 — Wed, 15 Nov 2023 15:08:28 GMT

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

Re: Need help with a 5ax undercut

evo80 — Wed, 15 Nov 2023 15:09:52 GMT

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

Re: Need help with a 5ax undercut

TK.421 — Wed, 15 Nov 2023 15:13:04 GMT

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?

Re: Need help with a 5ax undercut

johnc4668 — Wed, 15 Nov 2023 15:17:43 GMT

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

https://autode.sk/3FXPGD4

Re: Need help with a 5ax undercut

johnc4668 — Wed, 15 Nov 2023 15:19:02 GMT

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

Re: Need help with a 5ax undercut

TK.421 — Wed, 15 Nov 2023 19:37:01 GMT

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!

Re: Need help with a 5ax undercut

johnc4668 — Wed, 15 Nov 2023 19:47:15 GMT

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!

Re: Need help with a 5ax undercut

TK.421 — Wed, 15 Nov 2023 19:54:43 GMT

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?

Re: Need help with a 5ax undercut

johnc4668 — Wed, 15 Nov 2023 19:57:04 GMT

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?

Re: Need help with a 5ax undercut

TK.421 — Wed, 15 Nov 2023 19:59:50 GMT

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

Re: Need help with a 5ax undercut

iamcdn79 — Wed, 15 Nov 2023 20:06:06 GMT

https://www.autodesk.com/support/technical/article/caas/sfdcarticles/sfdcarticles/How-to-append-multiple-surfaces-into-a-single-surface-using-PowerMill-Modelling-or-PowerShape.html?_ga=2.53129707.2111239987.1699876079-1970479051.1676647267

Re: Need help with a 5ax undercut

johnc4668 — Wed, 15 Nov 2023 21:25:01 GMT

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.

Re: Need help with a 5ax undercut

iamcdn79 — Thu, 16 Nov 2023 12:00:45 GMT

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