I really think is a problem with temperature. My procedure derived from
much experimenting is to set the laminator to 275F, preheat the board to
around 250F, run the board through the laminator twice, preheat again to
250F and pass through two more times. The reason you have to preheat
again is because it will cool by the second pass. Do not depend on the
laminator to heat the board. It will not. Do you have a thermocouple
probe to take measurements?
On 2/17/2011 12:00 PM, Randy S. wrote:
>
> ok on the HP Toners ..
> I ran it thru the laminator ..and there was no sign of the toner even
> having thoughts of sticking to the board ..
> Either toner .. post office or the HP .. i guess its just not getting
> hot enough ..
> Are there popular laserjet printers used for PCB's ??
> I will keep trying .. and will try the paper towels ..
>
> Randy
>
> ________________________________
> From: "kabowers@... <mailto:kabowers%40NorthState.net>"
> <kabowers@... <mailto:kabowers%40NorthState.net>>
> To: Homebrew_PCBs@yahoogroups.com <mailto:Homebrew_PCBs%40yahoogroups.com>
> Sent: Thu, February 17, 2011 9:15:51 AM
> Subject: Re: [Homebrew_PCBs] Toner not sticking to PCB well
>
> On Wed, 16 Feb 2011 22:09:39 -0800 (PST), you wrote:
>
> >OK .. went from the problem with the traces running together
> >to the toner not sticking well to the copper ..
> >
> >Can it be that I'm not heating long enough ?
> >
> >Or can it also be that specific toner ?
> >
> >Its from a newer model HP copier ..
> >
> >Randy
> >
> >
> The variables have variables. Unless HP has changed their toners work
> great.
> I run mine (1022) at the highest quality/density setting.
>
> There's a "sweet spot" between time, temperature and size of board.
> I did a 4x6 board a couple of days ago using with the iron set halfway
> between cotton and linen and ironed for 2.5 minutes with moderate
> pressure.
> Pay special attention to the edges. I paced the board in a folded Bounty
> paper towel and used an old cutting board for support.
>
> I use Hammermill OficeOne Business Glossy 32# paper (16302-0) which
> may be discontinued. If you "overcook" this stuff it's almost
> impossible to
> get off without pulling the toner off the copper. "Undercooking"
> results in
> failure to adhere; "overcooking" or slippage results in smeared traces.
>
> I recently failed to properly support a board in the center and had to
> strip
> with acetone and start over due to traces running together; lesson
> learned.
>
> A couple of years ago someone here suggested placing the board between
> sheets of paper towel; this resulted in a major improvement for me.
>
> Keith Bowers WB4LSJ- Thomasville, NC
>
> [Non-text portions of this message have been removed]
>
>
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