incomplete CAM tool path

[Anonymous]

i was learning CAM on coursera and there was a triangular profile and in the simulation the tool path didn't simulate that. 

in the attached img below there should be a triangle machined in the left side.

[ChristopherMarion]

@Anonymous 

Can you share the file?  Just right click on it in the data panel and share a link. 

Make sure it is downloadable.

Cheers,

[Anonymous]

https://a360.co/30jn4PB

[ChristopherMarion]

@Anonymous 

Hello, take a look at this video.  Not sure if this is a bug or something related to the model geometry, but here is what I did to get the toolpath to generate in that one opening.  If this is a common occurrence, then I'd suggest we get Autodesk to interrogate.

Here is a link to the revised project https://a360.co/2CjWHkk

I hope this helps!

Cheers,

[engineguy]

@Anonymous 

It is somewhere in the selection of the contours, I just re-selected them and it works OK (week 1-MOD.f3d), I also did a file with the "Preserve Order" enabled and that seems to work fine (week 1-MOD-2 .f3d), both files attached for your inspection, I may well have missed something else, looked at it too long 🙂 🙂 🙂

2D Profile is at best "BUGGY" so as I have found in the past with a lot of Contours that are not easily "Toolpath Patterned" there are issues and careful selection in the best order possible is usually the way to go 🙂 🙂 🙂

@ChristopherMarion 

Chris, nice job, and I agree that the the whole of the 2D Profile needs looking at as soon as possible 🙂

Like you I tried different things and got weird results, one was that just opening the original file and enabling the "Preserve Order" (which often clears things in 2D Profile) the offending triangle worked fine but the bottom triangle went the same way with a tiny toolpath just as you found on the side one, very weird indeed, so not I think specific to that triangle??  😞 😞 😞

Anyway, here is what I have, it was in the end an easy fix, just dump all the original selection, reselect them all in a "proper" order and all is good 🙂 🙂 🙂

I should have done that in the first place, we live and learn, the simplest option is usually the best 🙂 🙂 🙂

[ChristopherMarion]

@engineguy 

Ahhhhh, good to know.  I'll remember the "preserve order" option in the future.  I just don't understand how not having that option checked will output just a portion of the selected geometry in that pocket.  That does not make sense.

It does seem like a good option to have on since it could be safer in a waterjet application.

Thanks for the feedback!

[Anonymous]

hey @ChristopherMarion i saw your video. so to test that i will make another model and test and will let you know about the bug also your video was really helpful. i think it could be a bug because my instructor on coursera didn't face that issue.

[Anonymous]

yeah i have these files from coursera 😂 

[seth.madore]

It appears to be doing this because it's trying to start on an abrupt corner:

 

If we give it an Entry Point, we will get the proper toolpath:

However, the linking seems to be all over the place and nothing I'd be pleased with running. To avoid that, you would have to create an entry point for each entity....madness.

I'll log a ticket about it trying to start in a corner. At least we can get that looked at....

 

[seth.madore]

I've logged this as CAM-23509

[ChristopherMarion · Accepted solution]

@seth.madore 

That is exactly what I got out of this.  I sent that same workaround to @Anonymous 

Thanks for logging this!