Homebrew PCBs

Looking for other peoples experiance with aligning double sided TT 
through a laminator.

I just tried to laminate my first DS board. I stuck down one side, 
removed the paper so I could drill a couple alignment holes and tried 
laminating the other side. Totaly destroyed the toner on the first 
side.

So what do other people do?

-Denny

Here is an Idea!!!
1- transfer  side 1 of pcb
2-use scotch tape to protect side 2 from etching.
3- etch side 1
4- drill a couple of hole for alignment
5-transfer side 2 using alignment holes and common pins
6-use tape to protect side 1 from etching
7-etch side 2
8- LOOK and SMILE!!!


another way I have heard of people doing this is by putting both transfer
papers up to a light and align the two.
then using staples staple the two pieces together like an envelope.
then insert board and transfer I have never tried this but sounds good.
and because you are going through a laminator you may want to replace the
staples with tape perhaps with adhesive on both sides.
just some Ideas
regards
victor

----- Original Message ----- 

From: "dkesterline" <desterline@...>
To: <Homebrew_PCBs@yahoogroups.com>
Sent: Saturday, January 17, 2004 12:22 AM
Subject: [Homebrew_PCBs] Laminating and alignment



> Looking for other peoples experiance with aligning double sided TT
> through a laminator.
>
> I just tried to laminate my first DS board. I stuck down one side,
> removed the paper so I could drill a couple alignment holes and tried
> laminating the other side. Totaly destroyed the toner on the first
> side.
>
> So what do other people do?
>
> -Denny
>
>
>
> Be sure to visit the group home and check for new Bookmarks and files:
> http://groups.yahoo.com/group/Homebrew_PCBs
>
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> To visit your group on the web, go to:
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>
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>
>

I did my first two sided board a couple of weeks ago with 11 mil vias.

After printing my two sides on PNP, I left about a two inch tail of
extra material along one side. After lining up the holes I taped the
tail together from the end and about 1/2 inch of the sides. I did not
tape around where the circuit board would be.

I put the pcb in betwen the the sheets and visually inspect to make
sure the split in the tail is more or less centered with the edge of
the circuit board. I then carefully put the whole assembly inside a
heavy paper carrier and that whole assembly goes through the
laminator. The paper carrier, which is just a piece of heavy
construction paper folded in half, is to keep the rollers from causing
the PNP to shift and make it possible to pass small boards through the
laminator..

In spite of my initial concerns about this working, the holes were
almost dead on.

If I can ever get over this cold, I have a new board that is a little
more complex and hopefully I can repeat these results. Sneezing and
smds do not mix. :-0




--- In Homebrew_PCBs@yahoogroups.com, "dkesterline" <desterline@t...>
wrote:
> Looking for other peoples experiance with aligning double sided TT 
> through a laminator.
> 
> I just tried to laminate my first DS board. I stuck down one side, 
> removed the paper so I could drill a couple alignment holes and
tried 

> laminating the other side. Totaly destroyed the toner on the first 
> side.
> 
> So what do other people do?
> 
> -Denny

Hi Denny,

I put both papers up to a strong light and align them both. They are held
together by means of paper clips (strong spring type ones). The papers are
previously cutted 'front' and 'back', after printing, to the same size of
the image, the sides are not cutted because they will be used for the paper
clips. The image will be in the center of this 'strip'. Then the board is
inserted between the two 'strips' and held in place with 2 or more pieces of
heat resistant tape. Remove the paper clips and send the 'sandwich' trough
the laminator. An extra step that can help keeping the board in place is to
cut the edges of the paper that wore used for the paper clips and use some
more tape.

The trick here is to perfectly cut and align the 'front' of the images with
the board and tape them together. Depending on your type of laminator you
may or may not need to use tape on the other sides.

Nuno T.

-----Original Message-----
From: dkesterline [mailto:desterline@...]
Sent: s\ufffdbado, 17 de Janeiro de 2004 5:23
To: Homebrew_PCBs@yahoogroups.com
Subject: [Homebrew_PCBs] Laminating and alignment


Looking for other peoples experiance with aligning double sided TT
through a laminator.

I just tried to laminate my first DS board. I stuck down one side,
removed the paper so I could drill a couple alignment holes and tried
laminating the other side. Totaly destroyed the toner on the first
side.

So what do other people do?

-Denny

---
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I use the method described above of holding the two sides up to the 
light to align them.  I attach the two sides with a glue stick.  
This holds them well and doesn't interfere with the laminator.  
Works perfectly every time.  I've never had a misalignment.
Tony

--- In Homebrew_PCBs@yahoogroups.com, "dkesterline" 
<desterline@t...> wrote:
> Looking for other peoples experiance with aligning double sided TT 
> through a laminator.
> 
> I just tried to laminate my first DS board. I stuck down one side, 
> removed the paper so I could drill a couple alignment holes and 
tried 

> laminating the other side. Totaly destroyed the toner on the first 
> side.
> 
> So what do other people do?
> 
> -Denny

So the offset of the board thickness does not cause a slight misalignment?

----- Original Message ----- 

From: "Tony Mattioli" <tmattioli@...>
To: <Homebrew_PCBs@yahoogroups.com>
Sent: Sunday, January 18, 2004 10:21 PM
Subject: [Homebrew_PCBs] Re: Laminating and alignment


> I use the method described above of holding the two sides up to the 
> light to align them.  I attach the two sides with a glue stick.  
> This holds them well and doesn't interfere with the laminator.  
> Works perfectly every time.  I've never had a misalignment.
> Tony
> 
> --- In Homebrew_PCBs@yahoogroups.com, "dkesterline" 
> <desterline@t...> wrote:
> > Looking for other peoples experiance with aligning double sided TT 
> > through a laminator.
> > 
> > I just tried to laminate my first DS board. I stuck down one side, 
> > removed the paper so I could drill a couple alignment holes and 
> tried 
> > laminating the other side. Totaly destroyed the toner on the first 
> > side.
> > 
> > So what do other people do?
> > 
> > -Denny
> 
> 
> Be sure to visit the group home and check for new Bookmarks and files:
> http://groups.yahoo.com/group/Homebrew_PCBs 
> 
> Yahoo! Groups Links
> 
> To visit your group on the web, go to:
>  http://groups.yahoo.com/group/Homebrew_PCBs/
> 
> To unsubscribe from this group, send an email to:
>  Homebrew_PCBs-unsubscribe@yahoogroups.com
> 
> Your use of Yahoo! Groups is subject to:
>  http://docs.yahoo.com/info/terms/ 
> 
>

For you guys that use the glue stick idea, do you mean that you put 
your two pieces up to the light to align them, then just dab a bit of 
hot glue between them on one of the edges?  Which edge or edges do 
you glue, or does it matter?

  Oh, and just a poll, how hot does your laminator get?

-Thanks
Josh