Hi
Some time ago i saw the Drewseph's puzzle building tutorial, and it help me a lot. But i realy need to cleanup this horrible things in my part:



And this happens amost everytime:


Anyone know how to fix it?

Oddly enough, I never got those when following that tutorial. IDK how to fix it.

It is caused by using straight lines or off-centre arcs rather than properly centered arcs in your cutting surfaces. A cutting surface for a 3x3x3 might look like this:

_
_|_

The red bit is what causes the trouble. It needs to be an arc that is centered at the common point of the turning axes of your puzzle (usually the origin).

like that?
i think i'm doing something wrong

Can you also post a picture of the sidebar that shows the history of what's been done?

I'll look into this when I get home, if you would PM me and wanted to send me a .sldprt of that 3x3x3 sketch that didn't turn out right.

The history is not very relevant in this case.

It looks like right at the middle of the arc, there is "something funny". Can you zoom in on that please?

here?

Ahhhh. I see the problem. It seems you are using a spline to make the arc. Instead, you should make it a circular arc with the center on the origin. That will make the cutout definitely a sphere.

Just as a suggestion, you don't need to make two separate sketches to make reference lines to use in final sketches. You can use "construction lines" or "centerlines" (which are the same thing) within your main sketch, and they won't be used for any extruded boss/base or cuts or revolves. You can even make curves into construction lines by clicking on the curve and checking the box labeled "use for construction". That way, you won't have any floating sketches in the end.

-pi (Eitan)

Are you adding any tolerance?

Not directly from the cuts, but it could easily be done.