On Wed, Jan 20, 2010 at 10:44 PM, I <kirk...@pdx.edu> wrote: > WTF? Did you speak with Ron (Duffy) at LCS? Perhaps I'm missing something > here, but unless you asked for very thick plates, that shouldn't be a > problem. It sounds like the kind of blow off I've heard when I've asked for > a freebee as a 'student organization'. > > So how thick are the parts you requested? Also, are the hole dimensions > larger than 1.5x the thickness?
-1/16 plate, clearance hole for 4-40 screw, which is approx 0.128 > > That said, another option (when heat is a problem) is waterjet cutting. I > know there is a shop in Vancouver that does it, but I don't recall the name. > -that should work, what kinds of tolerances can they hold? > Do you know of (did anyone suggest) a cnc punch in Portland that does > economical proto work? > > I'll give LCS a call and see what's up. If you could, let me know whether > the parts are in your name or PSAS. Maybe just send me the zip file that you > sent to them as well as the thicknesses, etc. > > > Quoting Andrew Greenberg <and...@psas.pdx.edu>: > >> So I've gotten quite a bit of feedback from people on laser cutting the >> avionics plates, and the answer is, in general, "bad idea". >> >> Apparently with so many little holes, the part heats up and warps >> ("potato chips" or "bananas" or pick your own curvy fruit analogy here). >> >> So, apparently, what we want is a CNC punch at a sheet metal shop. >> >> I'll pursue that now... >> >> Andrew >> -- >> ------------------------------------------------------- >> Andrew Greenberg >> >> Portland State Aerospace Society (http://psas.pdx.edu/) >> and...@psas.pdx.edu P: 503.788.1343 C: 503.708.7711 >> ------------------------------------------------------- >> >> _______________________________________________ >> psas-airframe mailing list >> psas-airframe@lists.psas.pdx.edu >> http://lists.psas.pdx.edu/mailman/listinfo/psas-airframe >> >> > > > > > > _______________________________________________ > psas-airframe mailing list > psas-airframe@lists.psas.pdx.edu > http://lists.psas.pdx.edu/mailman/listinfo/psas-airframe > _______________________________________________ psas-airframe mailing list psas-airframe@lists.psas.pdx.edu http://lists.psas.pdx.edu/mailman/listinfo/psas-airframe