How to figure out angles on physical sample

[lbsceldiablito]

 How do I figure out the holes' angles from center? They differ/are not a constant measurement and I don't have a jig to set it in to determine a first angle.

[evanp4509U4JZ]

Depending on how accurate it has to be (it doesn't look like a turbine) you could take a picture from TDC and use it as a canvas and sketch from it. If you can get at it with a caliper you can determine the hole circle diameter or diameters, and measure the distance between holes. If you have transfer punches you could transfer all the holes to a sheet and triangulate all the holes in at least 3 hole (preferrable 4 ) combinations using a single common hole.

[Drewpan]

Hi,

You could also put a piece of paper, preferably graph paper, over the holes and use a soft pencil to do a "rubbing". From

that and depending upon the accuracy you need you can then physically measure to find if there is a common Pitch

Circle Diameter and also if there is some standard angle that is hard to eyeball. You might find it is say 20 degrees

between the three and double that between the single and the group. Just a compass and a protractor is all you need.

I think that the suggested canvas method is better as you can position it on the Origin in fusion and scale it then use

sketches. Either method will not really be suitable for any Rocket Science application😎.

Cheers

Andrew

[lbsceldiablito · Accepted solution]

Thanks for the replies. I was reminded that I have a gasket for this piece. I simply scanned the gasket and took dimensions off the image. No rockets required. 😁