how do you create pads with an oval slot hole?

Justin Jones wrote:

I'm trying to create PCB footprints for some parts that use an oval

shape slot hole for snap-in mounting.

 

The standard pad menu only seems to offer circular holes.  How can I

define an oval slot-type cut?

 

Thanks!

 

-Justin

Maybe the first question is: how will your board house make these oval

holes ?

Probably need a milling process, in which case you could put a pad and

then mill in the middle of it ?

John G.

John Giddy wrote:

Justin Jones wrote:

I'm trying to create PCB footprints for some parts that use an oval

shape slot hole for snap-in mounting.

 

The standard pad menu only seems to offer circular holes.  How can I

define an oval slot-type cut?

 

Thanks!

 

-Justin

 

Maybe the first question is: how will your board house make these oval

holes ?

Probably need a milling process, in which case you could put a pad and

then mill in the middle of it ?

John G.

...and if so the manufacturer need one gerber with milling traces to

mill before plating (metallised holes), and one to mill after plating

(non-metallised holes) if you have holes/slots of both types.

Justin Jones wrote:

I'm trying to create PCB footprints for some parts that use an oval

shape slot hole for snap-in mounting.

 

The standard pad menu only seems to offer circular holes.  How can I

define an oval slot-type cut?

 

Thanks!

 

-Justin

I had to create oval holes in a project at work though I was using

Altium and not Eagle.  What I did was overlap three holes so it looked

like an oval shape.  The board house we used was Prototron Circuits and

they seemed to know what I wanted though they did call and ask just to

be sure.  Anyway, you might try that though not all board houses will do

oval shapes especially the cheaper ones.

    Z.K.

Hmm, well I haven't really chosen a board house.  I suppose they way I'd

want to implement it is whatever is cheapest and most widely supported at a

variety of board houses.

I have the datasheet here if anybody wants to see what I'm talking about:

http://www.equinoxsystems.net/usb_connector.pdf

Is adding a poly with arc endings to the mill layer the right way to do

this?  Can this sort of cut be done with some sort of router bit that could

go all the way through the board?  This seems like it would be a fairly

common problem, anybody have suggestions on what they've done in similar

situations?

"Justin Jones" <justin@techix.com> wrote in message

news:ggcjqi$mb9$1@cheetah.cadsoft.de...

I'm trying to create PCB footprints for some parts that use an oval shape

slot hole for snap-in mounting.

 

The standard pad menu only seems to offer circular holes.  How can I

define an oval slot-type cut?

 

Thanks!

 

-Justin

Z.K. wrote:

Justin Jones wrote:

I'm trying to create PCB footprints for some parts that use an oval

shape slot hole for snap-in mounting.

 

The standard pad menu only seems to offer circular holes.  How can I

define an oval slot-type cut?

 

Thanks!

 

-Justin

 

I had to create oval holes in a project at work though I was using

Altium and not Eagle.  What I did was overlap three holes so it looked

like an oval shape.

Caution /!\ Risk of breaking the drills if they actually drill on edge

of previous hole.

The board house we used was Prototron Circuits and

they seemed to know what I wanted though they did call and ask just to

be sure.

I guess they changed the holes to a milled trace themselves?

Morgan Leijström pravi:

Z.K. wrote:

Justin Jones wrote:

I'm trying to create PCB footprints for some parts that use an oval

shape slot hole for snap-in mounting.

 

The standard pad menu only seems to offer circular holes.  How can I

define an oval slot-type cut?

 

Thanks!

 

-Justin

I had to create oval holes in a project at work though I was using

Altium and not Eagle.  What I did was overlap three holes so it looked

like an oval shape.

 

Caution /!\ Risk of breaking the drills if they actually drill on edge

of previous hole.

 

The board house we used was Prototron Circuits and

they seemed to know what I wanted though they did call and ask just to

be sure.

 

I guess they changed the holes to a milled trace themselves?

This is usual practice...

If manufacturer see the overlaping drill they change this to mill path.

At least if the drill is under 1mm thick. If the drill is 2.5mm or more

they just use it. (it wont broke) If drill is im midle of that they

usaly contact customer.

s.