How to measure chamfer and angle using CMM

[amrrmzn]

Hi everyone.

I would like to measure chamfer distance and angle as per below requirement;

0.035 - 0.025 x 45degree

I constructed the cone but unable to perform the next step as I'm seriously new to this program.

Kindly help me :B

Thank you

[Darrollh]

If you use autocones, it will measure the countersink and give you the angle. If you’re measuring the chamfer like and edge break, use auto angle point on both sides of the chamfer and construct a line between them. Then on the adjacent surface, take two points and construct another line and measure the two lines using angle and it will give you the degrees. To measure the two angle points, measure a distance between the two angle points. When you measure, make sure you’re in the correct workplane.

[amrrmzn]

Hi Darrollh,

Thank you for your brief explanation.
However, I do not have angle point.
I constructed using autocones but I'm not sure how to get the result for the angle. How can I get it? Is it by using GD&T?

Thank you

[JEFMAN]

In dimensions window, select the cone, and select "A", it should add the angle.

[Schrocknroll]

For the size using a cone, there are several methods, but none pre-packaged like the angle measurement.
Method 1, easiest. Measure a plane above the cone. Measure a cylinder in the hole below the cone. Construct a circle at the intersection of the cone and the cylinder. Dimension the 3D distance between the circle and the plane. This will give the distance perpendicular to the plane.

Method 2, more advanced. You will need to construct a circle at the intersection of the cone and a plane right above it. Then measure a circle in the hole below it. Then you can subtract the radius of the bigger circle from the radius of the smaller one. If the constructed circle is CIR1 and the hole is CIR2 then use CIR1.R-CIR2.R to get the difference. You can add that to a report comment or construct an offset point to dimension it.

[Schrocknroll]

In dimensions window, select the cone, and select "A", it should add the angle.

If you need the angle of just one side instead of the included angle, make sure to tick the box "half angle".

[KIRBSTER269]

Another important thing that wasn't mention, If you have a countersink, then you have a hole, create a feature, circle or cylinder (your preference) make a new alignment, based on that feature (your X and your Y axis) then create your countersink (cone). IF your hole isn't perfectly centered or exactly the position it is supposed to be located, then niether is your countersink. ( No such thing as the perfect part) then after you can recall your old alignment. This will make better hits on your already limited countersink and you will get better readings.

[Schrocknroll]

+1 Good tip!