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mfgenggear, A stack up is exactly what I am trying to compute to confirm what the run out of the disk face. I will see if I can post an example that I am working though.

Thank you.

Hi 3DDave, can you please help me visualize it?

I am calculating the axial run out of a disk that spins on a shaft with bearings. See this example (not mine) of checking the axial run out. Also see the definition of axial and radial run out. I am given the radial run out values of the bearing cup and cone. why would these radial...

Hello All, I am looking for a worked out example of a cast to machined surface stack up. Or any resources would be helpful. The only thing that I have found is this example. But I’m not sure I am computing it correctly. https://www.dimensionalconsulting.com/cast-to-machined.html

Thanks BrianPetersen, A friend of mine asked my opinion of an RV that is thermo-composite. https://www.livrvtrailers.com/ I realized that my knowledge of plastic welding was limited.

Hello All, A couple questions on plastic welding. I'm interested in those with practical experience in the subject. Is plastic welding suitable for structural applications? I think the most obvious concern is fatigue, as there is not well-defined endurance limit for plastics. Are there any...

Hi Belanger, Yes, I would very much like to see the virtual condition calculations for this particular application. Provided it is not too much trouble. I'll give it a try as well.

3DDave, I was asked to compute the min span, in order to create a gage for making sure parts fit.

Hi Belanger, After looking at the drawing closer, This looks to be a target datum. (Z/S) But without the ability to share the actual print, this seems to be adding more confusion, as my hand copy is missing key items. (Sorry) I'll see if I can find a better open-source example. Which I...

The span directly between the holes. min / max And how to understand 2.0 mm position relative to datum A. I believe this call out refines , the 3.0 mm position tolerance, meaning restriction.

Hi Belanger, this is where I am having trouble. The adjacent leg of the tringle will change from nominal and be at min, at 3.0 positional tolerance when hole 1, is 1.5 to the right, and hole 2, is 1.5 to the left. This creates a smaller adjacent section, which then results in a smaller...

here is my attempt at calculating. The nominal is easy, it is simply the hypotenuse as shown. Where I am having trouble is with the min case. Taking the largest holes, diameter of 5.7 , so that 5.7 -5.0 = 0.7 which is a bonus tolerance of 3.7/2 =1.85 So then hole 1 , shifted over 1.85...

Two holes, diameter min = 5.0 , max = 5.7 Hole 1 coordinates 700 =x1 , 200 = y1 Hole 2 coordinates 750 =x2, 500=y2 I am struggling how to find the min span of the holes with the given multiple segment position tolerance. The span will be the hypotenuse of the triangle formed by the...

take a data set, time vs Force, 24 hours worth and select and plot every 100th point. You'll have to make up the data set. You'll encounter this in engineering testing quite a few times.

3DDave yes! I just got it, is to control the left-hand hole, in relation to the right hand.

If the position tolerance of the right-hand hole is 3.0mm, would the tolerance zone in relation to datum T, then be a circle of 3.0mmm? Where would it's center be? what is throwing me off is the datum is on the edge of the hole.

Thank you Steven_D_P, Yes, I was unsure about the MMC, good point.

Thanks Burunduk, Something along the lines of what this image shows?

If finding the maximum x direction the position is allowed to deviate, then it would simply be 1/2 of the position tolerance of 0.2 = 0.1, as shown in circle 3? The y component, or distance from the B datum would remain unchanged, correct?