Homebrew PCBs

I actually tried that. It worked sort of OK. Maybe with more experimentation 
you could get it better than I did.

Chuck
WB2EDV



----- Original Message ----- 
From: "Dave Leddon" <dave@...>
To: <Homebrew_PCBs@yahoogroups.com>
Sent: Saturday, April 05, 2008 12:09 PM
Subject: Re: [Homebrew_PCBs] Re: Direct Toner - First Try Results


> Instead of modifying a George Foreman grill how about sandwiching the 
> board
> between two thick aluminum plates, using enough c-clamps to insure even
> compression and placing the whole thing in an oven at 400 degrees for 
> about
> 30 minutes?
> Dave
>
> At 10:43 AM 4/3/2008, you wrote:
>
>>I am new to this group, and never thought about making my own PCB's.
>>I have usually ordered them, but I see the benefit and am curious
>>about this.
>>
>>Now on this thread...It would seem to me that you could modify a
>>George Foreman grill to use flat plates instead of the ribbed ones
>>and limit the heat and whammo a simple small double sided hotplate.
>>
>>Am I completely wrong on this? If not, I might look into it as I
>>have a couple laying around. And even so, they are only like 20
>>bucks for the small one.
>>
>>Brian
>>
>>--- In
>><mailto:Homebrew_PCBs%40yahoogroups.com>Homebrew_PCBs@yahoogroups.com,
>>"Bertho Boman" <boman01@...>
>>wrote:
>> >
>> > Hi Mark,
>> >
>> > If you are using a hotplate, the contact between it and the PCB
>>affects the
>> > PCB's temperature. In that case, you also ought to have a cover
>>that
>> > matches the hotplate temperature (good contact). That then in
>>effect forms
>> > a mini-oven with uniform temperature.
>> >
>> >
>> >
>> > It might be more convenient to have an oven with proper air
>>circulation and
>> > independently of the oven temperature control, attach a
>>thermocouple to the
>> > bottom of the PCB to monitor its temperature.
>> >
>> >
>> >
>> > Do you have any pictures of the modified laser printer?
>> >
>> > Bertho
>> >
>> >
>> >
>> > From: Mark Lerman Sent: Thursday, April 03, 2008 08:39
>> > Bertho,
>> >
>> > I wouldn't have thought that opto interruptors would be that
>> > repeatable. I'm going to run a sheet of paper through a laser
>>printer
>> > twice and see how well duplicate images register - a rough measure
>>of
>> > what's easily accomplishable.
>> >
>> > I just bought a pid controller - going to put it on a hot plate and
>> > see what happens. Or maybe an oven? Which is better for smt
>>soldering?
>> >
>> > Mark
>> >
>> >
>> >
>> >
>> >
>> > [Non-text portions of this message have been removed]
>> >
>>
>>
>
>
> [Non-text portions of this message have been removed]
>
>
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