I understand what you are saying and what I had shown is a mere workaround. Here’s a variation that might help. Occasionally I will make a part semi-transparent to help me when performing a desired result. Interesting phenomenon is that the area where the Subtract took place ends up being semi-transparent, which by the way can be useful in certain circumstances.

FilletFusion 360

But I did think that you could create the “cylinder” by copy/moving the curves from the side of your original guitar body sketch and using that as the curved edge. Once you have this curved line, add a chord between its ends to create a closed shape you can extrude upwards, rotate around an axis passing through the curve ends and lower onto the guitar body for your subtraction.

Chamfer fusion 360tutorial

Each side of the instrument is unique. My gut feel /guess is that I’m drawing a circle, that’ll extrude to make the cylinder……but I’m not certain how/where to draw it?

Fusion 360 chamferEmpty toolpath

I do want to say to the Sharpr 3D folks monitoring……… we need a work around here. This is a sort of work around, but it’s not MEASURABLE; that is I’m cutting a shape with another shape, but I can’t measure and get the “cut” or the chamfer I want.

Fusion 360 chamfernot working

Thank you - the finished product is what I want. I’m not sure exactly how to get the cylinder positioned exactly where I need. I guess I can try to play around [more time]. I realize a tapered chamfer is rather complicated, but for a CAD tool it doesn’t seem too odd.

Fusion 360 chamfervs fillet

I kind of don’t want to redraw my whole body, and make it TWO bodies; because in the end, I’ll 3D print it, and I need it to be one body.

Hi, FIRST……Thank you for your reply. secondly…… how specifically did you SCALE and get those results (a crescent or semi-circle with tapered ends, and a chamfer in the middle) ???

Great! Nice to hear. Question: Does this meet your requirement as a MEASURED chamfer? If so, where is it measurable? Thanks.

YES —- I saw previous posts; but these only show how to taper a chamfer on one end. I figured out how to scale ONE end and have the chamfer trim down to zero (see screen snapshot); but I want the chamfer to taper down on both ends.

Here I put together a way for you to measure the chamfer at the center of the arc. In this example I chose a 0.5" x 0.5" chamfer. Therefore the diagonal dimension is 0.707". The Scale method does a nice job of bringing the ends to a point however it also scaled down the center diagonal as well. The ends are not exact but can be adjusted close by tweaking the scale number as I did in my example making it 59.7%.

Chamfer fusion 360download

Hi, I have a curve (part of a guitar body); and I want a deeper chamfer in the middle of the curve, and then I want it to taper on both ends of the curve.

I tried…… I followed, or as closely followed as I could, the video. Here’s the end results: something kinda what I want……but again, it’s not a MEASURED chamfer. [insert crying icon here; get out Fusion 360]

Fusion 360 chamfertoolpath

I “think” what you did was ONLY scale on the bottom line of the chamfered edge, correct? I “think” I got it, or very close to it.

Here’s a possible workaround. I subtracted a cylinder that was angled at 45°. The radius of the cylinder is smaller than the radius of the contoured part you wish to have a tapered chamfer.

So I suspect because my curve is NOT symmetrical - but the scale here doesn’t work. You can see the pic below. Now I’m kind back to square one……

You can determine a precise measurement if you use the method that @KPeter suggested. If you want to specify the diagonal dimension then you need to divide that number by 1.414 and use it as the offset for the chamfer. (Example: a 0.5" diagonal dimension would require you to use a chamfer of 0.354" x 0.354".) The beauty of using Peter’s method is that you can change the angle of the chamfer to be anything other than 45° if you like. The 2nd half of the video shows Peters method.