Well, I agree, ringman, but it hasn't hit the radar of the people who can do something about it. They're too concerned with putting bandaids on our problems, ie, patching up returns instead of examing root cause. Which is frustrating for me because as the lab tech a big part of my job is to...
ringman, note the first line in my first reply. To clarify, these prints reference NO specs whatsoever. That is out of my hands, or the situation would be much different. However, I feel safe in assuming 1994 (despite the risks) because the datum callouts are per the 1994 revised spec...
More good points and I appreciate all the input. I believe I am in sync with type26owner but have encountered resistance to that bit of common sense here-- one designer is of the opinion that the CMM should drive the datum applications! I firmly believe the *usage* is paramount, most...
Thanks for the response ewh.
The centerline datum was the first to go. However, you're right in that a cylindrical axis will allow me to fix the first pin so I made the main body diameter (rather than the machined ends-- I'll get to why) datum A. I then positioned the left pin WRT datum A and...
oops, I forgot to include "S" in my list of NO-NOs, but I see someone else had already addressed it.
In looking at the various responses, it occurs to me that "-" (or somesuch) for new formal releases makes better sense than "A" IMO. In addition, using a blank for formal release is undesirable...
Thanks for the reply ring.
There's no statement on the print for Y14.5M, but i assume 1994 based on the types of datum callouts used.
I'd also considered using the rod body as a datum, but I kept running into circular references and it gave me a headache trying to resolve them. My problem...
I've seen a variety of schemas, but the one that worked best that I've used was utilizing numbers for engineering pre-release, and letters for formal release. In this case Rev 0 was the initial drawing for review, followed of course by 1, 2, 3, ad infinitum (although one would hope not...lol)...
I'm having to make changes to a cylindrical part used for calibration and have issues with the current GD&T methods used. For one, datum A was palced on a centerline, which I disapprove of. For another, the current schema doesn't address critical features for manufacturing of the gauge and its...
