Stupid Perimeter question
Stupid Perimeter question
(OP)
Why does Solid Works give a Perimeter value eqal to twice the actual Perimeter when a cylindrical surface is selected?
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RE: Stupid Perimeter question
RE: Stupid Perimeter question
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Mr. Pickles
RE: Stupid Perimeter question
Thanks All!!
Rich
RE: Stupid Perimeter question
You could just select one edge and measure its LENGTH
or
Select the end face of the cylinder instead of the cylinder surface.
RE: Stupid Perimeter question
I just did a few quick experiments on surfaces and the measuring tool. It seems that perimeter isn't really perimieter at all. Perimeter is actually the sum of all free edges of a surface.
I made a square planar surface, 10mm on a side. It's perimeter (calculators ready, everyone!), measured 40mm. When I placed a 3mm square hole in this surface, the surface's perimeter measured 52mm.
RE: Stupid Perimeter question
Yep, I actually used this all the time with our laser cut parts to calculate the total cut length of the part. Just select the plate, hit the measure tool, and use the perimeter readout. This includes all edges of the selected surface (thus including the holes).
RE: Stupid Perimeter question
The easiest way to find the outside boundary length is to use 'select loop' before measuring.
Roller1
RE: Stupid Perimeter question
If you select the CURVED SURFACE (ie. the whole curved surface of the cylinder highlights green) you get what you asked for - the total perimeter of this surface's edges - BOTH ENDS.
If you select the EDGE on the end of the cylinder (ie. the EDGE CIRCLE on one end highlights green) you get its LENGHT - exactly half the previous value and what you apparently really wanted.
If you select the FLAT SURFACE on ONE END or the cylinder you get its perimeter - the same as the last value and half the first one and again apparently what you really wanted.
Seems very simple and logical to me. Ya gotta be careful what you are selecting!! Try it out by making a simple part with one sketch of a circle extruded into a cylinder. You need to watch the little symbol that comes up next to your pointer. A little stick means you are going to select an edge (essentially a linear/wireframe object in a way). A little wavy patch means you are going to select a surface. Other symbols indicate other types of objects.
Incidentally, if you select the entire feature in the tree and then click on the measure tool it comes up blank - very disappointing. I kinda hoped it might give me the volume, etc of that individual feature. Ahh, sometimes I just expect too much from life.....
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