A small PAD is for throughhole plated boards or workers
that insist on making bad connections.
the "pipe" the throughhole plating forms holds together the uppper and
lower pad (and maybe some between).
This is obviously MUCH more mechanically stable than only one pad on one
side
which is only held by the glue.
also the electrical contact area is obviously much bigger in a plated hole.
Just apply pressure on one of this tiny pads from above when there is no
top layer
or plating (e.g. on a straight connector) and you will see it lift off
nicely.
do what you want for me the discussion is over.
ST
On Fri, 26 Mar 2004 14:56:04 -0500, Jeremy Taylor <jt@...> wrote:
> A smaller hole, is NOT for PTH,
> The pad size and the hole size, are two entirely different things,
> A hole for PTH needs to be ever so slightly LARGER, to allow for the
> intended proper size, as the plating will reduce the diameter of the
> hole.
> A Small pad is intended for automated assembly machines, or for highly
> skilled workers ; | The bigger pads are nice for hobby level assembly.
>
> The only problem I see with your first link is the not so accurate
> drilling. But still very workable.
> The trace hits the pad.and can go in both directions. as long as the
> contact
> area of where the trace hits the pad is not buggered, you'll get plenty
> of
> contact.
> JT
>
> ----- Original Message -----
> From: "Stefan Trethan" <stefan_trethan@...>
> To: <Homebrew_PCBs@yahoogroups.com>
> Sent: Friday, March 26, 2004 1:08 PM
> Subject: Re: [Homebrew_PCBs] Re: to drill or not to dril?
>
>
>> On Fri, 26 Mar 2004 17:54:39 -0000, Phil <phil1960us@...> wrote:
>>
>> > --- In Homebrew_PCBs@yahoogroups.com, Stefan Trethan
>> > <stefan_trethan@g...> wrote:
>> >> On Fri, 26 Mar 2004 16:32:03 -0000, Phil <phil1960us@y...> wrote:
>> >>
>> >>
>> >> Pads designed for throughhole plated boards just are not to be used
>> > in not
>> >> plated
>> >> boards. it is simple math, the area is too small.
>> >>
>> >
>> > hmmm, guess those last couple of boards I did shouldn't have worked.
>>
>> well, if you say the pads are OK we simply disagree:
>> http://www.geocities.com/phil1960us/pcb/bd2-2.jpg
>>
>> however these here:
>> http://www.geocities.com/phil1960us/pcb/bd1-2.jpg
>>
>> are more what i like...
>>
>> I have no problem with disagreeing with you, but in the first picture
>> the remaining ring is thinner than the track itself. that simply can't
>> be
>> good and
>> i do not think a decent soldering joint will result from it.
>>
>> I had similar pads to the ones you have there, years ago, until i made
>> them bigger
>> and the overall quality did go up dramatically.
>>
>> You can make a working circuit by just ending the track straight, and
>> drilling a hole
>> at the end. then you simply "glue" the part to the track. if you like
>> it,
>> well...
>>
>> However i do not recommend it for a beginner already having problems
>> with
>> hitting the center
>> of the pad.
>>
>> It would not at all be a problem to make bigger pads on the pictures you
>> have there, but
>> hey, i do not want to tell you what to do... if you like it then stay
>> with
>> it.
>>
>> I just want to help..
>>
>> Only keep in mind the difference when you have throughhole plating, it
>> is
>> riveted
>> together, which it isn't with our boards.
>>
>> ST
>>
>>
>>
>> Be sure to visit the group home and check for new Bookmarks and files:
>> http://groups.yahoo.com/group/Homebrew_PCBs
>> Yahoo! Groups Links
>>
>>
>>
>>
>>
>
>
>
>
> Be sure to visit the group home and check for new Bookmarks and files:
> http://groups.yahoo.com/group/Homebrew_PCBs
> Yahoo! Groups Links
>
>
>
>
>