[grgrydalton]

Attachment 257656

My question is what would be the easiest or fastest or best way to pull the correct geometry from this model to get a I.D. profile so I can write a tool path for my lathe?



I have bobcad/cam25 lathe and mill package.
I haven't been to a class.
Everything i know (very little) has been from trial n error.
I have learned a lot from reading post in the past then running out to the garage and trying them,lol

[BurrMan]

Maybe create a plane through it and generate intersection curves from the 2?

Hard to tell from a screenshot...

[grgrydalton]

BurrMan when you say create a plane though it and generate intersection curves from the 2, does that give me a 2d profile from the model?

I ended up extracting the edges from a solid then unstitched solid to surfaces so i could trim away what i didn't need. I was very painful day yesterday,lol

[BurrMan]

does that give me a 2d profile from the model?

Yes...

I ended up extracting the edges from a solid then unstitched solid to surfaces so i could trim away what i didn't need. I was very painful day yesterday,lol

That sounds like you are after a solid result from the cut plane.... There are probably a few ways to get what you want. If you can provide a sample we could give you some suggestions, as aspirin...

[grgrydalton]

I hope this works it's a compressed zipped folder with a step file in it.
the print has two dims. on it O.A. of 94mm long and a I.D. bore size of 98.196mm

Thank you for all your help in advance!!!

[RAF.]

I hope this works it's a compressed zipped folder with a step file in it.
the print has two dims. on it O.A. of 94mm long and a I.D. bore size of 98.196mm

Thank you for all your help in advance!!!

I think if you open it as a step file and save as bbcd / open in bobcad extract edges from solid it might give you all geom for dims.

Extract edges from solid and project.

Is this what you are needing ?

[mmoe]

The option to "project to Z Plane" RAF shows is new for V27 I believe. In V25 you would have to first extract the edges, then create a surface (above, below, doesn't matter much), and finally use the "project curves to surface" under the "Other" menu. You can then delete the surface leaving only the lines/curves. I do this all the time for boundaries where I need to then offset the geometry, so V27 looks like a huge time saver that way.

[RAF.]

I think maybe what you are looking for is lathe geom ?

This may work , extract line from solid and revolve the cut solid and extract geom. Inner line would have to be least radius used for revolve

Just a thought

RAF.

[grgrydalton]

Yes, that RAF that's what I'm looking for, I knew it could be done that away but, wasn't sure how to word it or explain what I wanted to do. How did you get it to fill in around the ears?

[RAF.]

Yes, that RAF that's what I'm looking for, I knew it could be done that away but, wasn't sure how to word it or explain what I wanted to do. How did you get it to fill in around the ears?

are the straight lines what you are referring to as ears? if so I just drew the having revolve the corner radius for cords.

[BurrMan]

I thought you were talking about this:

part profile - YouTube

[BurrMan]

Also, with this particular STEP file, you could do yourself a favor. Export it back out of BobCad as an IGES file, then re-import that IGEs file back in )select no curves and keep original).... This will force a shrinking of the underlying surface structure and the model will be lighter and less complex... Various Booleans will succeed more reliable...

[grgrydalton]

are the straight lines what you are referring to as ears? if so I just drew the having revolve the corner radius for cords.

The straight lines are what i need for the lathe path and that was what I've been look for a easier way to do but how do i fill in around the ear or lugs. How do I get to the point where I can draw the lines. To me it looks like you made a solid and it wraps the model???

I really appreciate all your guys help!!

[grgrydalton]

[QUOTE=BurrMan;1596284]I thought you were talking about this:

I've been wanting to learn that too, That's going to be used when i get these parts to the mill,lol thank you BurrMan

[RAF.]

There are many ways to get your geom, this may be another way that would be easy to do also.

I have Boolean subtracted most of the solid away just for simplicity (not really necessary)

Create a surface (create its own layer) to rotate / rotate around X / X0 Y0 Z0 / rotate surface up in this example to where it captures the most ID of solid / Boolean subtract solid from surface / rotate surface back to X Y / Extract edges from solid (which in this case is the surface) / Blank surface / trim and join lines as needed.

Hope this maybe helps.

RAF.

[BurrMan]

lol. I am completely lost as to what in that shape can be cut on a lathe....

grg, if you had the chance to get a clip of video of how you are cutting this and put it up here, you would be doing me a favor....

RAF, don't forget Boolean isect when you want to get small little chunks out of something...

[jrmach]

lol. I am completely lost as to what in that shape can be cut on a lathe....

grg, if you had the chance to get a clip of video of how you are cutting this and put it up here, you would be doing me a favor....

RAF, don't forget Boolean isect when you want to get small little chunks out of something...

I have bobcad/cam25 lathe and mill package.
I haven't been to a class.
Everything i know (very little) has been from trial n error.
I have learned a lot from reading post in the past then running out to the garage and trying them,lol



OP,are you planning on making this part ? or is this an exercise ?
Quite a bit to learn right off the start.
Not to mention specialty tools and a different CAM to do this

[RAF.]

lol. I am completely lost as to what in that shape can be cut on a lathe....

grg, if you had the chance to get a clip of video of how you are cutting this and put it up here, you would be doing me a favor....

RAF, don't forget Boolean isect when you want to get small little chunks out of something...

I think maybe what would be cut on the Lathe is (ditto both end) maybe this a first op before fingers or ears cut on mill. Some might say why not just stand tube on end and do complete op in mill/ but may be less run time with lathe op. and mill op

Yes Boolean intersect very good, less work

[grgrydalton]

I think maybe what would be cut on the Lathe is (ditto both end) maybe this a first op before fingers or ears cut on mill. Some might say why not just stand tube on end and do complete op in mill/ but may be less run time with lathe op. and mill op

Yes Boolean intersect very good, less work

Thank you RAF. That helps a lot.

[grgrydalton]

lol. I am completely lost as to what in that shape can be cut on a lathe....

grg, if you had the chance to get a clip of video of how you are cutting this and put it up here, you would be doing me a favor....

RAF, don't forget Boolean isect when you want to get small little chunks out of something...

I'll post pictures soon, I ran it threw the lathe late last night and I haven't got it up on the mill yet, I had something a little hot come threw the today As far as the O.D. profile I'm going to send out to have wire cut.

Picture shows the only thing I planning on milling out, well the fillet also before wire