Percentage of Circle Diameter

[[Ch...]]

Hi all

From the attachment , could someone help on how we can tackle this requirement.

Thank you.

Diameter Requirement.png

[[To...]]

Not sure if this will do the trick, but if you use 2 Point Diameter (under Size > Standards), there's an option to limit the evaluation range. You might need to create a few of these in order to cover the entire circumference.

[[Ja...]]

Here's an idea:

Probe twenty equally spaced points along your circle. Construct a circle from the first point, second point, 11th point, twelfth point. Measure the circle diameter. Construct a circle from the second point, third point, twelfth point, thirteenth point. Measure diameter.

Rinse and repeat. Each diameter will consist of 10% of your arc.

Kind of like this image, but my points are not equally spaced.

[[Ro...]]

Maybe use Radius Measurement?
If its a full circle then 10% would be 36º sweep, so radius measurement 1 would be 0 to 36. then 36 to 72, then 72 to 108, 144, 180, 216, 252, 288, 324, 360
if less than a full circle then you have to do the math.

you can add a note "1 Radius Measurement out of tol is permissible by customer per print. MINIMUM 31.529"

Make sure to set your sweep to 360 degrees, any loss of points due to start stop filtering is the fault of the customers strange notation.

but i guess you'll have to cut them dim in half, but you could double it again by masking the Radius measurement and using a formula with a result element.

sdaljhbasdjklasvb.JPG

[[De...]]

It says 10% of the surface, if this is a cylinder, then a circle will not help here as it will only give one 2D circular cross section of the cylinder.

Also, it says 10% total, that does not necessarily mean contiguous sections. If a method was to be used it needs to somehow find all the areas under the diameter and determine what percentage of the total is under the diameter.

So this could just as easily mean two sections that were each 5% of the total length of the cylinder that were undersize the entire way around, or one section the entire length that was 10% of the circumference that was undersize.

Best check is to make production make sure that the entire thing is over the minimum diameter, failing that, I would think you would need a ton of point measurements all over the cylinder, then a ton of radius measurements to the centerline of the measured cylinder. Then you could write PCM to count how many were under the size and report the overall percentage that were undersize.

Though possible, I think this would take a long time to program and a long time to run.

[[An...]]

See attached.

Contribution_07_08_2019.pdf