Newbie: How do I put component on bottom side of board ?

John wrote:

Beginner looking to place a connector on the bottom side of the

board.  How do i do this ?  I intend to sandwich two boards together

using a 12 pin SIL connector (header on one board and plug on the

other). Thanks in advance.

Mirror

--

Bert

Mirror reverses, but how does eagle know that the component is now on the

bottom side of the board?  (it seems to do this automatically with surface

mounts but how does it know with leaded components) ? ie. if i want to put

my SIL connector on the bottom, if i just use the mirror command, will the

connector now be on the bottom ?  Maybe look at it from manufacturing.  If i

give my design to a boardmaker, how they know if the connector is on top of

board or bottom ?

Thanks

"Bert Menkveld" <bert@betech.biz> wrote in message

news:gdsdio$al0$1@cheetah.cadsoft.de...

John wrote:

Beginner looking to place a connector on the bottom side of the

board.  How do i do this ?  I intend to sandwich two boards together

using a 12 pin SIL connector (header on one board and plug on the

other). Thanks in advance.

 

Mirror

 

--

Bert

 

John wrote:

Mirror reverses, but how does eagle know that the component is now on the

bottom side of the board?  (it seems to do this automatically with surface

mounts but how does it know with leaded components) ? ie. if i want to put

my SIL connector on the bottom, if i just use the mirror command, will the

connector now be on the bottom ?  Maybe look at it from manufacturing.  If i

give my design to a boardmaker, how they know if the connector is on top of

board or bottom ?

 

Thanks

You have to add that info to the design notes you use for manufacturing

or have silkscreen on both sides. I have used a dashed silkscreen on the

component side for circuit side mounted parts. If you wave solder those

holes need to be masked and parts added manually later. So adding a new

layer showing the parts of the board that need solder masking agents

applied before wave would help make sure the documentation is not

overlooked.

Paul R.

Great.  Thanks Paul.  Appreciate it.

"Paul Romanyszyn" <pgr@arcelectronicsinc.com> wrote in message

news:gdsl4p$d8f$1@cheetah.cadsoft.de...

John wrote:

Mirror reverses, but how does eagle know that the component is now on the

bottom side of the board?  (it seems to do this automatically with

surface mounts but how does it know with leaded components) ? ie. if i

want to put my SIL connector on the bottom, if i just use the mirror

command, will the connector now be on the bottom ?  Maybe look at it from

manufacturing.  If i give my design to a boardmaker, how they know if the

connector is on top of board or bottom ?

 

Thanks

You have to add that info to the design notes you use for manufacturing or

have silkscreen on both sides. I have used a dashed silkscreen on the

component side for circuit side mounted parts. If you wave solder those

holes need to be masked and parts added manually later. So adding a new

layer showing the parts of the board that need solder masking agents

applied before wave would help make sure the documentation is not

overlooked.

 

Paul R.

On Fri, 24 Oct 2008 08:03:28 -0400, "Bert Menkveld" <bert@betech.biz>

wrote:

John wrote:

Beginner looking to place a connector on the bottom side of the

board.  How do i do this ?  I intend to sandwich two boards together

using a 12 pin SIL connector (header on one board and plug on the

other). Thanks in advance.

 

Mirror

That seems more like a workaround than the proper way.  Is that the

most appropriate way, within the capabilities of Eagle?  Or is it the

only way?

I ask this because doing  it that way is problematic.  When you put a

surface mount on top, and then a surface mount on bottome, you can

route between the two, and the ratsnests disappear, as if the

connection was made, but the connections aren't actually made.

To connect a surface layer pad between top and bottom requires a via.

But when I test this, one can draw a route (not wire) between two

connecting pads, and the vias disappear.   How does one verify

connections if this is the case?

Mike wrote:

On Fri, 24 Oct 2008 08:03:28 -0400, "Bert Menkveld" <bert@betech.biz>

wrote:

 

John wrote:

Beginner looking to place a connector on the bottom side of the

board.  How do i do this ?  I intend to sandwich two boards together

using a 12 pin SIL connector (header on one board and plug on the

other). Thanks in advance.

 

Mirror

 

That seems more like a workaround than the proper way.  Is that the

most appropriate way, within the capabilities of Eagle?  Or is it the

only way?

That really is the "proper" way.  I don't know of any other way to place a

component on the bottom of the board.

I ask this because doing  it that way is problematic.  When you put a

surface mount on top, and then a surface mount on bottome, you can

route between the two, and the ratsnests disappear, as if the

connection was made, but the connections aren't actually made.

 

To connect a surface layer pad between top and bottom requires a via.

But when I test this, one can draw a route (not wire) between two

connecting pads, and the vias disappear.   How does one verify

connections if this is the case?

Hmmm, I'm afraid I don't really understand what's happening here.  I have

routed SMT components on both sides of the board, and have not encountered

the sort of misbehaviour you're describing.  Things do tend to get more

confusing when you have parts on both sides of the board.

If you can't figure out what's happening, maybe you could post a small

sample board so we can see the problem you're describing.

--

Bert Menkveld

On Mon, 15 Dec 2008 07:48:24 -0500, "Bert Menkveld" <bert@betech.biz>

wrote:

Mike wrote:

On Fri, 24 Oct 2008 08:03:28 -0400, "Bert Menkveld" <bert@betech.biz>

wrote:

 

John wrote:

Beginner looking to place a connector on the bottom side of the

board.  How do i do this ?  I intend to sandwich two boards together

using a 12 pin SIL connector (header on one board and plug on the

other). Thanks in advance.

 

Mirror

 

That seems more like a workaround than the proper way.  Is that the

most appropriate way, within the capabilities of Eagle?  Or is it the

only way?

 

That really is the "proper" way.  I don't know of any other way to place a

component on the bottom of the board.

 

I ask this because doing  it that way is problematic.  When you put a

surface mount on top, and then a surface mount on bottome, you can

route between the two, and the ratsnests disappear, as if the

connection was made, but the connections aren't actually made.

 

To connect a surface layer pad between top and bottom requires a via.

But when I test this, one can draw a route (not wire) between two

connecting pads, and the vias disappear.   How does one verify

connections if this is the case?

 

Hmmm, I'm afraid I don't really understand what's happening here.  I have

routed SMT components on both sides of the board, and have not encountered

the sort of misbehaviour you're describing.  Things do tend to get more

confusing when you have parts on both sides of the board.

 

If you can't figure out what's happening, maybe you could post a small

sample board so we can see the problem you're describing.

Oops! My mistake.  Because you were so sure this would work, I checked

it again.  There actually still is a ratsnest line.  It's just very

short, from the end of the top surface part to the pad on the bottom

surface part.  I was expecting to see the ratsnest from the original

pin to the 2nd pin. 

The other indication that mirror works is that when I do use the via,

the trace will auto complete when I end on the 2nd pad.  Doesn't do

that if I try this without a via. .  I don't use boards with

components on both sides (yet but have one planned) so I guess I

jumped to a false conclusion. Sorry.