Homebrew PCBs

Sure that looks fine for the center that is easy. Your first chip can
be an 18, 20, 28 pin package. You have to find every pin location for
that chip to put the solder paste down. That is the center of the pad
most of the time. Will that program do that and does it work with
Eagle? Looks like a good program but since the Eagle is paid version
we need to use it.

Derek
www.hightechsystemsllc.com




On 9/20/06, Leon Heller <leon.heller@...> wrote:
> ----- Original Message -----
>

> Sent: Thursday, September 21, 2006 12:27 AM
> Subject: Re: [Homebrew_PCBs] Re: SolderPaste dispenser and Pick and Place.
>
>
> >I just went to the Cadsoft website under ulp I still don't see the
> > file with the name smd-coordinate.ulp. You are probably right there is
> > better way to do it. If I ever find this ulp I will give it to Steve
> > to try. At the time that we did it there was nothing we found that was
> > available. You need 2 different reference points the center of the
> > part for pick and place and the center of each pad for solder paste.
> > One axis sorting does not give you the optimal g-code with the fewest
> > moves. Pads right next to the other pad will be skipped and come back
> > to latter. An intelligent sort that can handle 2 axises at the same
> > time is what is needed.
>
> The Pulsonix software I use can output a pick and place file, here is part
> of one for one of my boards:
>
> Ref    Part Name          Side   Placement Centre    Rotation
>
> IC1    16F88              Top    (363.22,570.23)     0
> CONN1  2X1                Top    (349.92,591.18)     90
> CONN2  3X1                Top    (343.61,558.16)     0
> CONN3                     Top    (343.61,547.37)     0
> IC3    78L05              Top    (350.52,585.47)     270
> C1     C1                 Top    (354.33,556.89)     0
> C2                        Top    (356.24,539.75)     180
> C3                        Top    (361.95,539.75)     180
> C4                        Top    (356.24,542.29)     180
> C5                        Top    (361.95,542.29)     0
>
> Leon
> --
> Leon Heller, G1HSM
> Suzuki SV1000S motorcycle
> leon.heller@...
> http://www.geocities.com/leon_heller
>
>
>
>