I'm trying to measure how round/curved the edges of a phone and phone case are in order to complete a 3D design. How are these metrics usually measured? Thank you

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blochow2001 t1_ivrlelw wrote on November 10, 2022 at 2:18 AM

You can also measure it with a radius gauge.

CptClownfish1 t1_ivri9qc wrote on November 10, 2022 at 1:55 AM

The “tightness” of a curve is measured in “radius of curvature”.

PerspectivePure2169 t1_ivrwxja wrote on November 10, 2022 at 3:51 AM

Radius gauges in a machine shop environment.

Less precisely, you can press the profile into clay, and then see which drill bit fits that shape best.

In manufacturing this is always specified as a radius callout. So half your drill bit diameter if you do that.

No--Platypus t1_ivrfkik wrote on November 10, 2022 at 1:35 AM

Well for pipe bending with a 90 degree bend we draw line out along each edge of the pipe until it the lines intersect. We measure the distance from the start of the turn to the intersect lines amd that gives us the radius of the curve

sleemanj t1_ivrjip8 wrote on November 10, 2022 at 2:04 AM

Use a fine toothed profile gauge, then scan/square-on photo the gauge, then trace with curves in your cad package.

howard416 t1_ivw5u6g wrote on November 11, 2022 at 1:27 AM

Put the items into a flatbed scanner and try various circle sizes in a image editing program