Slot cusp

[britovsekmatic128]

Hello,

Is there a way to remove the cusp in the middle of the slot with one operation?
I've been trying diffrent settings to no avail.

Also what is the better strategy for roughing open slots? Pocket Clearing or 3D Contour?

Thanks!

[engineguy]

@britovsekmatic128 

I think that if you only want to use a single Operation the probably the simplest/easiest would IMHO be a basic 2D Contour and use the Roughing Passes to step over and the Multiple Depths to step down and get the correct depth of cut and adjust speeds/feeds to suit your material/tool.

I just did a quick example using your 32 dia/R8 tool, you can play around with the values to suit, it is only an example of how it can be done 🙂

[britovsekmatic128]

Thanks you for the quick reply @engineguy

I tried your suggestion with diffrent tools and groove measurments but the 2d contour doesn't seem to account for radius and is overcutting into the model.

Ideally i would like to use 1 tool/stragety but cant get it to work like i've would like to.

[engineguy]

@britovsekmatic128 

Ah, apologies, my mistake, I did not properly check the Radii in the Groove, just assumed they were the same as the Tool Radius 😞 😞

I will have another look later 🙂

[oleg.tikhomirov · Accepted solution]

Hi @britovsekmatic128,

We discussed very similar problem recently. I believe that Fusion360 should automatically reduce stepover on flat areas to ensure no cusps (if it's possible) but it's not supported at current moment. Hopefully we'll add it soon.

Right now you can force smaller stepover in Pocket. It solves the problem with cusps but causes some unnecessary passes for other z-levels.

[britovsekmatic128]

Thanks @oleg.tikhomirov your solution is working perfectly.

It seems to me that fusion is harder to set on open pockets as opposed to closed pockets🤔

[oleg.tikhomirov]

@britovsekmatic128 You're absolutely right. We're going to make it much easier soon. Just use the following approach as workaround for now.

1) Big enough circle around the part as boundary. (green on screenshot)

2) Specify machining area as stock using "stock contours" (yellow on screenshot)

[britovsekmatic128]

Thanks @oleg.tikhomirov will do.