3D adaptive rest machining not working

[david_masshardt]

I'm having some trouble with the 3d adaptive rest machining. I'm trying to mill a model with a 3 mm tool first, then do the details with a 1 mm tool. But no matter what settings I'm using in the second operation in for rest machining Fusion 360 always generates a full path for the 1 mm tool instead of just machining the parts the 3 mm tool could not get into. I tried with and without stock to leave and I did set the rest machining source to previous operation.

Any ideas what I could be doing wrong here?

[Anonymous]

@david_masshardt 

It would be nice if you could attach file with your design.

[david_masshardt]

Here are some pictures. In the SecondPass picture everything is milled again even though rest milling is active. I found out that I can also mill this with a 2d adaptive operation, there it works better. But I would still like to know what I'm doing wrong here in the 3d adaptive operation.

[johnswetz1982]

It could be stock to leave, tool, other settings. Cant tell with only pictures.

[david_masshardt]

Here is the whole f3d file. It's just an example I made to test my new cnc machine.

[Anonymous]

@david_masshardt 

In both Adaptive ops you should probably select Flat Area Detection, otherwise bootom plane is calculated with given tolerance. In second Adaptive Ignore Cusps for Rest Machining definetly should be selected. And maybe tolerances should bit more tight.

[david_masshardt]

I just changed all those settings and did set both tolerances to 0.01, but the second pass still machines the whole part. Any other ideas?

[daniel_lyall · Accepted solution]

Have a look at the attached model it was just a few settings needing to be changed most where what you were already told to try, and I selected what to cut.

[david_masshardt]

Thanks for the help. I guess the biggest difference is that I used the silhouette setting and you used a selection of the outer circle and the inner path.

[daniel_lyall]

Sometimes you have to use a selection so the rest machining knows where to cut.

[Coras_Alin]

most of the time second tool enters to heavy in the leftover material, even if the rest operation settings are good. I think this should be default avoided pe the software, nobody wants that.

[Coras_Alin]

it should be good if someone makes a tutorial on how its the best to use rest. (ignore, machine or compute cusps, and what values in any situations...)

[Kzinty]

The whole point of rest machining is to cut the remainder of the stock with the new tool selected as prescribed in the subsequent tool path. If I have to tell 360 where to cut then the rest machining function is not working. I just spend 30 minutes trying to figure out why my tool paths are not rest machining and found the CUSP's to be my culprit. I tried all 3 options with 0.000 and 0.010 but nothing worked than suddenly after I edited the tool's speed, SFM, and chip load, the cusp calculation started to work, all 3 options. Attached is a file with the cusp calc working and a file with it not working.

[engineguy]

@Kzinty 

FYI, it is much better to just upload the f3d file and not an f3z file, just makes it hard work to separate stuff out.

No software will perform well if the user is not proficient so you get the level of use comensurate with the level of expertise. Doesn`t mean the software is "bad" !!

[Kzinty]

I will remember that about the f3d. I hope that's a signature, I didn't say Fusion360 is bad. I actually like it for most of my work. There are a few areas that need improvement but overall very very good value for the money.

[daniel_lyall]

Doing a derived second op directly from the first adaptive gives you the same settings you just change the tool depth and with of cut and tick rest machining and any other setting that was set in the first op stays unless you change it, this can speed up the possess quite a bit if you need to get the tool paths out the door.

[Kzinty]

That is exactly how I made all but the 1st toolpaths.