Theoretical top of ball

[[Jo...]]

Hello All,

So with crankshaft flange end chamfers and post end chamfers or valve seats you get the occasional "overball dimension" back to a datum surface. (ball in this case is 24mm w/60 degree conical chamfer) Is there a "canned" routine for this in Calypso after measuring said cone? I converted an old Quindos math routine with trig and updated it to work in parameters while grabbing a dimension from the cut cone calculation routine. Seems to work as I get close to anticipated nominal. I just wanted to test it with a Calypso routine.

Thanks in advance!!

[[Cl...]]

I've got something that might work, but depends on a few
variables. Can you post any pics or drawings so we can
get a look at exactly what you want?

[[Ri...]]

I can't recall the author of this file.
Hope it helps.

Sphere in Cone Height.pdf

[[Ri...]]

Here is the last instructions I made for this topic.

In Calypso 2021:

Create a Half Cone Angle Characteristic for your Cone

Create a Result Element and use the following formula:
((cos(deg(getActual("Half Cone Angle1").actual))*Gage Ball Radius)*2)

Create a Cone Calculations Feature, select Position Definition, and use the following formula:
(getActual("Result Element1").actual) + ((1/cos(deg(getActual("Half Cone Angle1").actual)))*Gage Ball Radius)+Gage Ball Diameter

[[Ri...]]

In addition - Ted Hurlbutt wrote up some instructions as well.

[[Jo...]]

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It looks as though there is a pdf for doing this in Calypso that is pretty much the math I had. I attached a screen shot as to what I'm looking at. Thanks.

over_ball.jpg

[[Cl...]]

There might be a better, simpler way, but what I do is, if the ball sits in a V or a cone, you can scan two opposing lines (cone) or two opposing planes (V) and move them in towards the center the nominal ball radius. Then intersect both. This gives you the ball center. You then recall that intersection into a theoretical circle. Now you can use caliper distance to get the 163.5

[[Ri...]]

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I just learned something similar to this.
I scan two opposing lines.
Drop in a Tangent element, select the Lines with a window box and assign a diameter.
It creates the diameter feature tangent to the two lines.
Put in a Caliper element and assign the min/max properties for your measurement.

[[To...]]

How about adding a measurement over ball construction to Calypso.....

[[Ri...]]

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I just want Datum Shift.

[[Jo...]]

That would be great! They already have "Cone Calculations", why not just add "Over-ball Calculations" or something to that matter. For me, I use this simple Gage-ball calculations for finding either Top or Bottom of Gage-ball:

[img]
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For this example, I use a simple Alignment (Plane1 and Cone1).

1) Intersect Cone1 with Cone1.
2) Create a Theoretical-Sphere that represents your Gage-ball and add this formula to whichever axis the cone is on.
3) Intersect the Cone1 with Theoretical-Sphere. Select either Result1 or Result2 that correspond to your measurement.

[img]
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Hope that helps.

[[To...]]

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Would a cone calculation with the Position Definition set to D =0 work for step 1?

[[Jo...]]

Yes. That would be the same. Just replace "Tip of Cone" with "Cone Calculation" in the formula.

For this example: getActual("Cone addition1").y-(0.28125/2)/sin(deg( getActual("Cone1").apexAngleHalf))

[[Br...]]

A different version of the same issue. A Vee shaped groove with a callout to an overball dimension straight and parallel to a plane.
I am a rookie so use small words

[[Ri...]]

In away there is a function.
Scan two opposing lines on the cone surface.
See: Cadcube_Cone_Lines.JPG

Use tangent element
Enter 2d Line1
Enter 2d Line2
See: Cadcube_Tangent_Lines.JPG

Set desired Diameter (Ø29)
See: Cadcube_Tangent_Ø29.JPG

Use Caliper Distance
tangent element
Plane1
See: Cadcube_Tangent_Caliper Dist.JPG

Cadcube_Tangent_Caliper Dist.JPGCadcube_Cone_Lines.JPGCadcube_Tangent_Lines.JPGCadcube_Tangent_Ø29.JPG