3+2 Roughing

[Kendo]

What the heck controls the depth being cut in this 3+2 op I've been poking around with?

Example on youtube makes this look waaaaay too easy...

I can't find a setting that even affects the depth, the stock was selected as a solid, represented by the wireframe box around the part

The solid box under the part was for fixture avoidance.

The last two steps are beyond the stock material, and the final step has an insanely small stepover for some reason. I don't even know where it's coming from.

I need to use a 2nd plane from the backside, but when I did that, the first plane was still cutting way deeper than necessary

[crazy^millman]

Steep Shallow in 3D in 2D Toolpaths it is the linking.

In 3D pay attention to the step down and keep the distance a divisor of the total distance you are looking to cut. I may adjust 100% to 99.7% to removes these annoying things.

[Kendo]

I changed the stepdown to .020" and it still cuts past the stock like 15 steps!

 

[#Rekd™]

Did you restrict the depth as Ron suggested in the Steep/Shallow settings?

 

[Kendo]

Steep / Shallow... sure wish I could find it

I've used it in other toolpaths but this is 3+2 "auto roughing" and theres no steep / shallow I can find

Even when I use two tool planes, opposed at 180 to each other, both directions will cut the entire depth of the geometry from top to bottom and beyond the stock in both directions. This is with .100 step down

 

[Matthew Hajicek - Singularity]

You can also make another solid (or surface) for avoidance; that can allow it to rough deeper in some areas than others if you want.

 

Is that for a clavicle?

[Kendo]

Humerus

Thanks, I see that could work

I know this 3+2 is relatively new, the video I watched said if you don't like the results from automatic 3+2 just go back to using opti-rough and a bunch of stock models

[#Rekd™]

1 hour ago, Kendo said:

Steep / Shallow... sure wish I could find it

Sorry I though all the newer toolpaths had this....Matthew's suggestion is great!

[Chally72]

Hey Kendo, could you post the file or send it to me if possible so I can poke around and offer some suggestions?

In the subpages under Cut Pattern, there are options for height control similar to steep/shallow, but a lot of conventional Optirough wisdom does not apply here.

Looking at your part shape and approaching it with my apps engineer hat, I'd probably choose to go after this with multiple Optiroughs with stock models, but with some preconfigured settings with 3+2 auto, perhaps you can get something approaching as efficient as opti with a little less time invested.

[Alien]

Hello,

If we are talking about 3+2 automatic roughing multiaxis toolpath, on the cut parameter tab, depth step or number of slices can be selected.

I hope this help.

Good luck!

Sincerely,

Michael.