when stacking circles it automatically groups them
when you create two circles with the same center point, they are constrained to be concentric. This really means that they share a single center point. To move one without moving the other, you need to delete the concentric constraint:
There are lots of other ways to do this. You can extrude a single circle with a taper angle, you can create two separate sketches, or use Revolve. But, your way is just as good...
Jeff Strater
Engineering Director
Fusion 360 lofting doesn't work like that.
- Simply create an offset plane at the top height of the truncated cone you want to create.
- Create a sketch on the plane.
- If your original circles' centerpoints are on the Origin, then draw the smaller circle at the new sketch's origin.
- If not on the Origin, then project the smaller circle to the sketch.
- Loft between the two sketches.
You could also just extrude the larger circle and specify a taper.
Another method would be to extrude the larger circle, then do a chamfer.
ETFrench
You are creating two concentric circles on the same plane "in the same sketch", so they are both in one sketch, of course they will move together. Create a second plane, above the first, and make a second sketch on it, then loft between them. If you just want a taper cylinder, do a single sketch, and extrude it with an angled side is the easiest method to get a tapered cylinder. See Screencast (no sound).
John Hackney, Retired
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Actually, you can loft between items in a single sketch. As @jeff_strater pointed out, removing the Concentric Constraint allows the circle(s) to be moved off of the sketch plane. The loft command will work with these circles.
ETFrench
