Re: [CAD_CAM_EDM_DRO] PCB routing with CNC milling machine....

On Tue, 28 Oct 2003 01:35:03 -0600, you wrote:

>
>
>Harvey White wrote:
>
>>On Mon, 27 Oct 2003 11:46:44 -0600, you wrote:
>>
>>
>>
>>>
>>>
>><snip>
>>
>>
>>>Somebody posted a message a while ago saying they were doing PCBs
>>>for something crazy like $1/sq inch. You can't even get the blank
>>>material for that little. I saved the file somwhere, but I can't find it at
>>>the moment. If I turn it up, I will send a message.
>>>
>>>
>>
>>Interesting, since I'm getting 4x6 presensitized positive resist G10
>>(I think) from a retail store at about 6.80 USD.... Walk in off the
>>street.
>>
>>Were you thinking double sided?
>>
>>
>It is so rare for me to do a single-sided board, I don't even think about
>less than 2 sides. I still haven't found the link or whatever to the
>guy who
>is doing it on the cheap. He is doing double-sided, plated-through holes,
>just no solder mask.

That's pretty good, then, I'd suppose. I don't do double sided
because of the feedthrough problems (so far). I also have not yet
designed and built a holding fixture for the double sided stuff,
although it's easy enough to do. Might get into double sided the
first of next year. I'd build an exposure frame to do both sides at
once.

To drag this back to the CNC world a bit more, the boards I use for my
stepper drivers are single sided, about 3 x 4 inches. Uses the
297/298 chipset.



Harvey

>
>Jon
>
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