From: "William Meyer"
Subject: Re: 1U Rackmount Chassis
References: <3E28DD49.A6FB1F00@azglobal.com> <3E2A21C7.81B63661@azglobal.com>
Date: Sun, 19 Jan 2003 04:49:58 GMT
NNTP-Posting-Date: Sat, 18 Jan 2003 20:49:58 PST
> Immediate volume: 1's for proto, then lots of probably 25. Budget is
> flexible, but the benchmark has been set in the US$55 range before
> cutouts and silkscreening. No sense throwing money away.
> FWIW, this is a 5-watt PCB with a few edge-mounted connectors. The
> expectation is a simple chassis with the PCB on standoffs and the
> connectors protruding from cutouts in the front panel. No internal
> metalwork; hopefully not even a fan assembly.
For so simple a requirement, it should be no great challenge to design a =
two-piece steel chassis in which the ears are an element of the base plate.
Presumably, with your PCB using only 5W, the chassis needn't be very deep. =
That will allow a very simple design, and that will keep fabrication costs =
> Unless I'm oversimplifying (time will tell), we literally need a metal
> box with rack-mount ears, so I hesitate to jump into customizing. I've
> found a couple; now the goal is to find one that looks nice. So far,
> the top contender (among few) is a unit at altronics.com.au - slightly
> upscaled for about US$55. Looks much nicer than Bud's for the same cost
> (before duties).
For a prototype, you could attach a box to a rack panel, but for =
production, a two-piece folded structure would serve rather well, I think.
> We'll probably pursue custom fab when the volume picks up. I don't mind
> the one-time costs, but the per-unit pricing still needs to be under
> ~US$90 in lots of 25-100. I think we need to get closer to the source
> to get the prices I'm expecting.
I think much depends on the design. Keeping it easy to fold will keep the =
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