Wrapped tool path help

[davesvo]

Not sure If i'm asking fusion to do something it can't do yet or if I just don't know what i'm doing. I would like to mill this part in the 4th axis and i thought wrapped toolpath should do it. Can someone take a look and see if its posible? I can get a 2d contour on it kinda with some funky results, but i would like to do a 2d adaptative first, but can't select geometry that will work. 

Thanks

Dave

[daniel_lyall]

No fusion can not do cuts like that yet, but there is a way to do it.

you put in some fo material just do a extrude through the center of the part to make it a solid it does not need to be real, I will post a example soon.

[daniel_lyall]

It turns out fusion does not like that part at all, I can get a contour (this is fine) a bad pocket not usable at all and no Adaptive at all.

I would say it's to do with the angle the faces are on, if you look you can see that the angle changes all the way around the part.

I have tried picking the top as the toolpath and the bottom it gives the same toolpath (bad).

If you look at this model you can see the faces are straight on almost 90 degrees to the toolpath with this model I can a get good toolpaths from the top or bottom of the model, your one will be about 70 degrees to the toolpath.

 

Your file attached made solid.

[davesvo]

Thanks for the info. The angles are actually correct to how the mill will cut while rotating around the A axis, all the angles point to the center. I am going to try drawing it a different way and see if that has any affect on being able to select the edges needed for tool paths. 

Dave

[daniel_lyall]

https://forums.autodesk.com/t5/computer-aided-machining-cam/tips-amp-tricks-dealing-with-bad-4x-geom...

[davesvo]

So as per this YouTube video https://www.youtube.com/watch?v=0B88jJ1CG3w I drew the part exactly the same way as in the video and still I can't select the correct geometry to get a 2d Adaptive wrapped tool path. I get the same as the original model that wants to select chains rather than the edge or face even using the open contour tool it still won't select the correct edge.  

I can get the 2d contour to kinda work the start and stop crash into the part but the rest looks right. 

I am attaching the new file just in case it helps. 

Thanks

dave

[davesvo]

Ok So I found out that if i put a radius in all the sharp corners I can select the correct geometry for a 2d adaptive path, but it wont generate and gives me a cam kernel error. I also drew the exact part from the youtube video and get the same cam kernel error? Is the wrapped function broken? new file attached

[davesvo]

OK more info. So I got the 2d contour to work right you just have to separate the path into 2 segments fusion does not like if the wrapped path goes past 360 deg. So that works great. I still cannot get the 2d adaptive path to work because it wont let me select a open path it just automatically selects a closed path even with the little popup you can't select open path. Any ideas?  I'm pretty sure that is the problem causing the cam kernel error. 

[daniel_lyall]

Have a look how this file is done, there is a reasion why I make it a solid.

[davesvo · Accepted solution]

Your part does not have geometry on the end that goes 360 deg around the part. It's the 360 that causes all the problems. There is definitely functionality issues with the wrapped tool path, I know it's new and they are probably working on making it better. The best thing they could do is make it possible to select open chains once you select the wrapped function in the 2d adaptive that is where I feel it's broken, you can't select open geometry like you can on a flat part or at least I can't find a way to do it (If it is possible please someone let me know how to do it). Fusion will not do a full 360 intersecting geometry in the wrapped function, so it needs to be split in 2 chains to get it to work. 

Anyway I found a work around and got my part to work, so maybe this will help anyone else that runs into this problem. 

What I did was split the part into 2 bodies, using the split body tool. (thinking as I type it may not be neccacary to split the part) Then I created a surface on the inside of each part (must be 2 separate surfaces) Extend the surface past the face end of the part. Use the split face tool to basically make a negative of the part or to show the area where the tool path goes. Then use that surface to create 2 separate chains in when selecting pocket geometry. It's not elegant but it got the job done, I think some improvements to the wrapped tool path would make most of this unnecessary but until then this will work.

I am attaching the file so anyone who wants to see what i did can. 

And If anyone has a better or simpler solution please let me know.

thanks

Dave

[daniel_lyall]

You can do a selection that goes over 360 on your part starting from a open or closed profile, you can do way more than 360, you just have to edit the toolpath before you select the wrap setting.

If you select a toolpath then select the wrap and the toolpath needs adjusted you will have problems if you have wrap selected then go to set the toolpath you are going to have a hard time getting a good toolpath.

You select a toolpath do any editing the toolpath needs then once the toolpath is good you select the wrap setting not before if it need more editing you turn wrap off.

The reasion I make something a solid is quite often you have a hard time selecting a toolpath, picking a toolpath from a solid is most times way easier than not.

If there are a lot of sort sections to pick a toolpath from it is a lot harder to do.

Also when you make a model for wrap the corners need to be the same diameter as the tool.

The one main problem with not haveing a wrap function in cad is when you make the model when you extrude the cut it lines up with the center of the part, then when you goto cam the center of the tool lines up with the center of the part refer to Al vid on bad toolpaths pasted above, Xander says about it as well.

I can give you a example of a part that wraps way more than 360 

[davesvo]

I'm not following you 100% on making and adjusting a tool path before selecting the wrap function? I tried to select geometry before i selected the wrap function and it just converted to closed once I selected wrapped? I would love to see a example of a part that has a 360 deg intersecting open contour part with a 2d adaptive tool path on it. I am always looking for new ways to do stuff in fusion, every day is a learning experience. 

Thanks!

[daniel_lyall]

Here you go I try to only say what I know I can do.

The end where the trident is, is open for all 3 toolpaths

[davesvo]

Ok, I have no problem with geometry like that, but it does not intersect itself the end and the start don't end together, that is what the problem is with a part like mine. If your spiral crossed over itself anywhere it would not work. 

[daniel_lyall]

@davesvo I am dam sure I have done 360 wrap adaptive in the past but for the life of me I can't get it to do it.

Your way of doing it work quite well, can you select your post with the file that works as the solution.

you can make it a solid and split it as well it needs a non intersecting toolpath if it's 360 around the part not along.

This is a no for adaptive and pocket 

This is a yes

Dave I was very wrong you where correct sorry about that

[Anonymous]

Hi,

I often get a problem that I now cant get rid of.

I get a nice wrap by using the 2d countor as in the video but it only goes about 90 degree. You go tthe same error when you showed us your video. Then you went into "Compare and Edit" and changed the selection to "unwrapped geometry - OFF" And it worked a full 360 degree.

But now I get the error message empty toolpath, no passes to link - and I cant et out of it.

I know that it probably has something to do with the heights. Especially if I select the face of a cylinder it doesnt highlight the face but actually chooses something far off. So I tried to choose a distance from absolut origin, but still no luck. 

What to do? 

[Steinwerks]

@Anonymous This is difficult to diagnose without the part to look at. Can you export it as a .F3D and attach it here? If it can't be shared publicly I can PM you my email and you can invite me to the project or email it to me directly.