could do a slight desidgn modification where you
have 2 sets holes made in each side top and botom and have a metal strip that
spans the holes with counter sunk screws to hold together
with with the original pc holders as are
this way you could just have schells made once
the mold is made its just a matter of remaking the schells when demand is needed
i payed a little more for my molds
between £40-60 for the mold but like i said you pass this on to the
customers in the selling of the device that is if you get enough
demand
also them eproms you could use a flash card system
when you could have a compactflash card socket out of the top of the card and a
fpga design where you could take the eprom signal from the vfx and ytransfer it
and wright to a compact flash card or a swithching eprom circuit which has
the ability to adress certain size blocks
its been done with the sy85 where a 1mb eprom was
used to adress 64k blocks so that it could switch between
Original Message -----
From: ron amundsonSent: Thursday, June 09, 2011 4:33 PMSubject: Re: [Ensoniq-VFX-SD] Cases for EEPROMs
Injection mold design and fabrication has dropped multifold over the years... short of uber high volume complex shapes where in a multi-cavity tool steel mold with multiple side pulls is required. Today, its often cheaper to injection mold enclosures in low volume rather than paying for secondary machining ops on COTS enclosures, albeit complexity is the driving force. I've had injection molds made for under $5K, albeit they were aluminum, they shared a MUDset and did not require any side pulls. http://www.dme.net/dme/products/quick_change_sys.htmlThe VFX cartridge case was injection molded as the volumes were high, so labor was a concern, as likewise would be the cost of any type of fastener. Ie, its a snap together case, where in the board standoffs are slightly offset, such that they locate and secure the board and at the same time serve to hold the case halves together. I'm thinking the 2 case halves would be pretty cheap if one dispensed with the snap together assembly and used mounting screws. It might even be possible to thermoform the case halves for even less NRE.
From: john bluhm
To: Ensoniq-VFX-SD@yahoogroups.com
Sent: Thu, June 9, 2011 9:36:08 AM
Subject: [Ensoniq-VFX-SD] Cases for EEPROMs
That's interesting, but what do they charge to make the injuction mold? I used to work fora keyboard company, and they wanted to make their own plastic keys (we were usingones imported from Italy at the time). We contacted a number of injection mold companies,in Milwaukee, and they all wanted $75,000 to $80,000 dollars to make the molds, and thatwas in 1980!I'm just wondering.
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