Sounds like a problem with the brand or PCB you're using, or perhaps a ba=
d=20
(dull) drill bit...?  I have not had this problem, using harbor-freight d=
rill=20
bits, and a drill press operating at about 1000 rpm.

Many techniques to solder w/o plated-thru holes....
- Suspend part about 1/4" (more or less depending on part) above board so=
 you=20
have access to solder the top.   Works well for me, except I question the=
=20
mechanical hold on the part if I'm going to use the board in a vehicle, e=
tc.
- Tin the leads on the part, solder same as above, then slowly push the p=
art=20
down while keeping the lead heated, and sort of "squish" the solder on.  =
I've=20
had poor results with this.
- Design the board so that the pads are mostly on the bottom, except wher=
e you=20
know you have access to the top (like vertically-mounted axial caps, etc)=
=2E  I=20
always do this nowadays and it definitely solves a lot of problems.
- Add additional vias just outside of the component pads and component=20
dimensions for the connection.


Cheers,
-Neil.



On Thursday 24 April 2003 19:20, Jai Dhar wrote:
> Hello all,
>
>  I just finished my first double sided board using UV to transfer the
> tracks. The board turned out really well, except I'm having a problem w=
hile
> drilling. When drilling holes that don't have a track attached (ie: jus=
t a
> pad), the pad lifts off the board and goes onto the drill bit? It reall=
y
> isn't a HUGE problem since there is no track attached, but I do lose a
> soldering point... which brings me to my next question.
>
>  Are there any techniques used for soldering a component on both sides =
of
> the board?  What I mean is that it's easy to solder the bottom side of =
the
> board since it's just the component leads that stick out... but on the =
top
> side, I have to sorta squeeze the iron between the board and the compon=
ent
> - this can easily burn the component, and it looks kind of messy since =
the
> component isn't all the way down against the board. But I can't think o=
f
> any other way to solder it to the top tracks??? I hope I have explained
> myself clearly,
>
> Thank you,
>
> Jai
>
>
>
> ----------------------------------------
> This mail sent through www.mywaterloo.ca

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