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Re: Neoprene Specs, Dimensioning & Tolerancing
Re: Neoprene Specs, Dimensioning & Tolerancing -- technobia	Post Reply	Top of thread	Forum

Posted by: kelly_bramble ® Administrator 08/22/2005, 08:52:53 Author Profile Mail author Edit

For what you describing, I doubt ASME Y14.5M – 1994 is going to help you for several reasons. First, I would like to point out that I train to the ASME standard throughout the USA and Canada. I doubt the manufacturers of the silk screens, or flat pattern fabricators are going to have any idea what the symbols used with GD&T are anyway, and I don’t think training these professionals is required to get a quality product. Most designers and plastics type manufacturers have moved away from toleranced drawings. Unless you have specific dimensional requirements, such as interface fits, detail dimensions with tolerances are not required. With plastics and other pliable materials, the manufacturing process tends to be more capable than the dimensional requirements of the product. This is because the product itself is “pliable”. What you will likely be required to define is either a flat pattern, or contour drawing. In the PCB world there will be an artwork drawing and a production master type drawing, which may be derived from a CAD model. I would first contact a couple or more candidate manufacturers and ask what they require is the form of documentation or CAD data.

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Re: Neoprene Specs, Dimensioning & Tolerancing
Re: Re: Neoprene Specs, Dimensioning & Tolerancing -- kelly_bramble	Post Reply	Top of thread	Forum

Posted by: Technobia ® 08/24/2005, 09:26:24 Author Profile Mail author Edit

Thanks for the reply - what you say about dimensioning & tolerancing makes scense however how would you inspect such an item without some kind of dimensional refrences? However, I would imagine there would still have to be some kind of assembly reference on the pattern pieces to locate them for assembly. This product is something someone designed from an existing product as a base that is being reverse engineered with modifications added into the design. I just want to make sure I articulate all that is required to get this thing documented for a quote and selecting a fab house. Doing the silkscreen like a PCB makes perfect sense and I have done that kind of work before. I would imagine that I just place the alignment targets somewhere outside the boundaries of the pattern.

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