Recent content by Wunderbear

Hi, I was working on a relatively simple injection molded cosmetic component and was searching for appropriate standards for specifying tolerances on molded parts so I can factor that into material selection. I found several standards such as: DIN 16901...

So how is this requirement usually communicated? If I rely on my RSS calculations, how can I communicate to the vendor the design intent that I am really hoping for him be mean centered around the nominal? In the absence of good data for the process capability, is my best bet to inflate my RSS...

Hi, I recently learned about this G,D and T symbol <ST> to indicate that a tolerance has been statistically allocated. After a bit of digging, I found an example of a typical note associated with this symbol (REF: dimensioning and tolerancing handbook by Paul Drake): "Tolerances identified...

Hello, I performing a stress analysis using solidworks simulation on a standard E clip and was wondering how I should interpret the results. Specifically, I'm trying to simulate what happens during insertion- when I apply a displacement boundary condition on the lead-in, I see multiple areas...

Thanks CH, thats exactly what I was looking for!

Hello, Is there a way to bilaterally locate a pattern of holes? That is have a circular feature to feature tolerance zone but a rectangular pattern tolerance zone? I've encountered this scenario a couple times. One approach is to individually tolerance each hole with composite feature frames...

In some cases, the reason why someone would want to go to a bigger sheet size when making drawings in a CAD program (to draw to scale/include more views or such) is so that the ratio between your drawing and the dimensions fonts become larger. Hence, It makes sense to stick with one sheet size...

Hello, How complete does a drawing have to be and what is the general practice in the age of CAD? In many cases, I end up sending CAD files to the manufacturer and maybe just mark critical tolerances on the drawing with a general tolerance for unspecified dimensions. However, when this part...

ok, I think a convention where I could use a larger sheet size (C,D) for more complex parts and smaller sheet sizes(A,B) for relatively simpler ones (a large rectangular plate with 4 holes e.g.) is what I'm leaning towards based on this discussion. I would give more weight to complexity than the...

Hello, I'm trying to figure out whether there's merit in standardizing the sheet size for all drawings or picking the sheet size such that the part is drawn to scale. What is the industry practice here? I can think of pros and cons for both approaches. Having a standard sheet size means the...

Perfect! Much Thanks!

Hello, TLDR: How should I use G,D T to show a square/rectangular tolerance zone around the FOS regardless of the shape of the feature? Simple scenario: a hole is dimensioned using a +- tolerance scheme and say the X, Y locations are (10+/-0.25, 12+/-0.25). Now, if we apply G,D and T to this...

Hello, I am relatively new to ansys and I am trying to simulate an electrostatic comb drive for a micromirror. The two sets of comb drives are staggered with respect to each other in the vertical direction and there is a dummy wafer (which is 'hanging') under the top comb bank. I am...