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> > >
> > > >
> > > > On Mar 18, 3:13=A0am, Peter Bennett wro=
te:
> > > > > On Wed, 17 Mar 2010 12:08:34 -0700 (PDT), Alex
>
> > > > > wrote:
> > > > > >hi
> > > > > >I have to get a board manufactured , and I have to keep all
> > > > > >designrules to 8 mil .
> > > > > >this wil give me a ring without copper around a hole made in a p=
olygon
> > > > >in signal layer.
> > > > > >and this ring will be 8 mil or 0,2 mm
> > > > > >I would =A0like to get your oppinion about this ..is the distanc=
e =A0small
> > > > >enough to solder =A0a pin in the hole to the copper area when th=
ere are
> > > > >this 8 mil distance. I know that =A0it will be soldered with a w=
ave
> > > > >solder mashine. I have never been worrying about such details as=I
> > > > >have drilled my boards myself , but thinking that often the pin =
or
> > > > >wire is not filling the hole fully out, and its not a =A0problem=
to hand
> > > > >solder =A0at all.. but what about when its wave soldered.. =A0? =
=A0I have
> > > > >been looking at pads in the libraries ,and it seems that there w=
ill be
> > > > >a ring without copper at only 4mil /0,1 mm
> > > > > >thank you for any thoughts about this
> > > > > >alex
>
> > > > > If the hole, or a pin inserted in the hole, =A0is intended to con=
nect to
> > > > the polygon plane, then there should be NO clearance around the h=
ole -
> > > > the copper of the plane should connect directly to the plating in=
the
> > > > hole. =A0If the hole is not plated, then the plane copper should =
come
> > > > right up to the edge of the hole.n
>
> > > > > The 8 mil design rule means you require an 8 mil clearance betwee=
> > > > different circuits, not between parts of a single circuit.
>
> > > > > If you want solder to connect two pieces of copper, it will not b=
ridge
> > > > a 1 mil gap. =A0But if you don't want a connection, it will happi=
ly
> > > > bridge an 0.1 inch gap!
>
> > > > > --
> > > > > Peter Bennett, VE7CEI =A0
> > > > > peterbb4 (at) interchange.ubc.ca =A0
> > > > > GPS and NMEA info:formatting link
> > > > > Vancouver Power Squadron:formatting link
otedtext-
> > > > > - Show quoted text -
>
> > > > Thank you Peter
> > > > this was what I needed to understand that I scould not have any
> > > > distance between polygon and hole .and yep solder always connect wh=
ere
> > > it is impossible..
>
> > > > But if I use a hole and put it into a polygon (eagle) then I get
> > > > distance, and only when setting copper to hole and all lines to 0 m=
il
> > > its possible ..I guess its because a hole is not treated as a solde=r
> > > hole.e
> > > > So I got an idea ,to make a pad in library with the same form as th=
> > > whole polygon and with a hole placed ,and this seems to work
> > > > alex
>
> > > that's not the right way to do it. only things with the same net name
> > > will be connected.
> > > if you want a pad connected to a polygon you should just use a normal
> > > pad and then
> > > give the polygon the same net name as the pad.
>
> > > a hole is normally just a hole, it does't have copper inside it meant
> > > for
> > > mounting screws and such
>
> > > a hole with copper inside is called a pad and should follow the rules
> > > for
> > > how much bigger the copper circle should be than the hole inside
>
> > > -Lasse- Skjul tekst i anf=F8rselstegn -
>
> > > - Vis tekst i anf=F8rselstegn -
>
> > mange tak :)
> > thank you.. but I have tried to take a pad, change drill to 8 mm
> > +change diameter to 13 and put it into the polygon.. change names to
> > same name.
> > but ..the problem I then got was small openings in copper for thermal
> > relief..
> > and in this design I'm not allowed to have any other holes in the
> > copper.
>
> > If you have an idea to get a whole copper plane around the pad ,i like
> > to hear from you..until now ,think I have tried 100 different
> > approaches to solve my problem..
>
> right click the polygon and untick thermals :)
>
>
>
> > I have just been saved from the problem as the boards will be made
> > with a smaller hole and the client will drill it to size .but would
> > ofcourse like to get a solution after much time spend.
> > It can be solved with using library and create a pad with a polygon to
> > make the whole pad. and when creating it this way, all is in the pad
> > layer.
> > you said that it was not correct to do so ? =A0why.
> > alex
>
> just a very backwards way of doing it and not the way it was meant to
> be done
>
> -Lasse- Skjul tekst i anf=F8rselstegn -
>
> - Vis tekst i anf=F8rselstegn -
ok but then give me a way to do it ...and be sure it realy works alex