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
>> -------------------------------------------------------
>>
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>>
>
>
>
>
>
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