Re: [CAD_CAM_EDM_DRO] Laser "route" Printed Circuit Boards

Because they're talking about an EDM, which is a completely different
machine which cannot drill.
An EDM has never been used for PCB AFAIK.

Danny

William Thomas wrote:

> Hi All:
> Why would you need two machines. Why not change tools from end mill to drill and do the drilling.
> GOD'S BLESSINGS
> Bill
>
> On Sun, 08 Nov 2009 22:23:28 -0600, Jon Elson wrote
>
>>
>>
>> Danny Miller wrote:
>>
>>> The EDM also needs a guarantee of very good electrical contact on the
>>> trace. I'm not sure how that'd be guaranteed as the traces are cut and
>>> will become isolated.
>>>
>> If you do it as a raster, then they never get isolated from the other
>> side of the sheet.
>>
>>> Even if submerged in a conductive liquid, a
>>> short, thin trace may not have good current capacity.
>>>
>>> I just don't see where this has any benefit that compares with milling.
>>> The milling machine can route and drill on the same pass as it does with
>>> a trace side.
>>>
>>>
>> Yup, it takes a separate machine to do the drilling. But, I gather the
>> raster process is
>> much faster, just a couple minutes for a small board, no matter how complex.
>> But, the added complexity may be why it seems this process may have gone
>> off the
>> market.
>>
>> Jon
>>
>>
>>
>
>

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