Howard,
What you say is especially true since one of the labs I teach is etching a
circuit board. Letting the students see the progress helps maintain their
attention.
Thanks to all that helped me!
Rick
-----Original Message-----
From:
Homebrew_PCBs@yahoogroups.com [mailto:
Homebrew_PCBs@yahoogroups.com]
On Behalf Of StoneTool
Sent: Saturday, November 24, 2012 10:09 PM
To:
Homebrew_PCBs@yahoogroups.comSubject: Re: [Homebrew_PCBs] success!
Rick:
Results are all that matter............. There is a good case
for being able to view the progress of the etching as you can do with the
glass tray and the light underneath it. The system with bubbles and a board
hanging vertically does not allow for this........... It did sound like
there was a good case for aeration though.
Howard
On 11/24/2012 03:38 PM, Rick Sparber wrote:
> Howard,
>
> With an etch time under 10 minutes and clean results, I'm happy with
> this simple approach.
>
> Rick
>
> -----Original Message-----
> From: Homebrew_PCBs@yahoogroups.com
> [mailto:Homebrew_PCBs@yahoogroups.com]
> On Behalf Of StoneTool
> Sent: Friday, November 23, 2012 2:59 PM
> To: Homebrew_PCBs@yahoogroups.com
> Subject: Re: [Homebrew_PCBs] success!
>
> Rick:
> Have you opted against the bubble agitation system altogether?
> Sounds like a simple and logical method the way it was presented.
>
> Howard
>
> On 11/23/2012 01:14 PM, Rick Sparber wrote:
>> A friend looked at my pictures of my failed etchings and suggested I
>> lower my UV light and greatly extend the exposure time. I went from 7"
>> down to 2.5" and from 1 minute to 8 minutes. HUGE improvement. My
>> first test piece was done etching in 9 minutes with the ferric
>> chloride at about 75F. The second test piece used the same set up and
>> chemicals but the acid sat out in the Arizona sun for about 15
>> minutes so must have warmed up. It etched in
>> 5.5 minutes.
>>
>>
>>
>> My next test cycle will be with all the same except I will try using
>> convection etching.
>>
>>
>>
>> Rick
>>
>>
>>
>> [Non-text portions of this message have been removed]
>>
>>
>>
>> ------------------------------------
>>
>> Be sure to visit the group home and check for new Links, Files, and
> Photos:
>> http://groups.yahoo.com/group/Homebrew_PCBsYahoo! Groups Links
>>
>>
>>
>>
>
>
> ------------------------------------
>
> Be sure to visit the group home and check for new Links, Files, and
Photos:
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>
>
>
>
>
>
> ------------------------------------
>
> Be sure to visit the group home and check for new Links, Files, and
Photos:
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>
>
>
>
------------------------------------
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