how to hold PCBs at right angles to each other?

M

Michael

Guest
Hi - I am working on a board where I will have three PCBs at right
angles to each other. Thus they'll have one common corner and three
shared edges. These boards need to be exactly at right angles to each
other, and they can't be allowed to move. Are there any premade
solutions for holding boards at right angles to each other? Surely
something like this exists?

Thanks!

-Michael
 
On May 16, 10:04 pm, Michael <nleah...@gmail.com> wrote:
Hi - I am working on a board where I will have three PCBs at right
angles to each other. Thus they'll have one common corner and three
shared edges. These boards need to be exactly at right angles to each
other, and they can't be allowed to move. Are there any premade
solutions for holding boards at right angles to each other? Surely
something like this exists?

Thanks!

-Michael
Click to expand...
DIMM socket
 
On Wed, 16 May 2007 22:04:29 -0700, Michael wrote:

Hi - I am working on a board where I will have three PCBs at right
angles to each other. Thus they'll have one common corner and three
shared edges. These boards need to be exactly at right angles to each
other, and they can't be allowed to move. Are there any premade
solutions for holding boards at right angles to each other? Surely
something like this exists?

Mount them in the corner of a box, with standoffs?
Click to expand...

Good Luck!
Rich
 
Rich Grise wrote:

On Wed, 16 May 2007 22:04:29 -0700, Michael wrote:


Hi - I am working on a board where I will have three PCBs at right
angles to each other. Thus they'll have one common corner and three
shared edges. These boards need to be exactly at right angles to each
other, and they can't be allowed to move. Are there any premade
solutions for holding boards at right angles to each other? Surely
something like this exists?


Mount them in the corner of a box, with standoffs?

Good Luck!
Rich

Hot Melt glue ??
Click to expand...
 
On Thu, 17 May 2007 11:23:02 -0600, Donald <Donald@dontdoithere.com>
wrote:

Rich Grise wrote:

On Wed, 16 May 2007 22:04:29 -0700, Michael wrote:


Hi - I am working on a board where I will have three PCBs at right
angles to each other. Thus they'll have one common corner and three
shared edges. These boards need to be exactly at right angles to each
other, and they can't be allowed to move. Are there any premade
solutions for holding boards at right angles to each other? Surely
something like this exists?


Mount them in the corner of a box, with standoffs?

Good Luck!
Rich

Hot Melt glue ??
Click to expand...

Row of wires out of one pcb soldered into the other

D from BC
 
D from BC <myrealaddress@comic.com> writes:
Row of wires out of one pcb soldered into the other
Click to expand...
Put an exposed copper strip along each edge, and just solder the edges
directly together.
 
On May 17, 1:23 pm, Donald <Don...@dontdoithere.com> wrote:
Rich Grise wrote:
On Wed, 16 May 2007 22:04:29 -0700, Michael wrote:

Hi - I am working on a board where I will have three PCBs at right
angles to each other. Thus they'll have one common corner and three
shared edges. These boards need to be exactly at right angles to each
other, and they can't be allowed to move. Are there any premade
solutions for holding boards at right angles to each other? Surely
something like this exists?

Mount them in the corner of a box, with standoffs?

Good Luck!
Rich

Hot Melt glue ??
Click to expand...
Maybe I wasn't specific enough... They need to be at exactly 90
degrees to each other. A degree error would be very significant...
 
On May 17, 1:53 pm, DJ Delorie <d...@delorie.com> wrote:
D from BC <myrealaddr...@comic.com> writes:

Row of wires out of one pcb soldered into the other

Put an exposed copper strip along each edge, and just solder the edges
directly together.
Click to expand...

This would work if I didn't have as stringent of accuracy
requirements. They need to be at 90 degrees plus or minus a tenth of a
degree or so. Initial production numbers will be fairly low (~100) so
they will be hand assembled.
) soI wouldso
 
On May 17, 12:04 pm, linnix <m...@linnix.info-for.us> wrote:
On May 16, 10:04 pm, Michael <nleah...@gmail.com> wrote:

Hi - I am working on a board where I will have three PCBs at right
angles to each other. Thus they'll have one common corner and three
shared edges. These boards need to be exactly at right angles to each
other, and they can't be allowed to move. Are there any premade
solutions for holding boards at right angles to each other? Surely
something like this exists?

Thanks!

-Michael

DIMM socket
Click to expand...
The boards are something along the lines of 3cmx3cm. Dimm sockets are
too big I think.
 
On 17 May 2007 13:09:25 -0700, Michael <nleahcim@gmail.com> wrote:

On May 17, 1:23 pm, Donald <Don...@dontdoithere.com> wrote:
Rich Grise wrote:
On Wed, 16 May 2007 22:04:29 -0700, Michael wrote:

Hi - I am working on a board where I will have three PCBs at right
angles to each other. Thus they'll have one common corner and three
shared edges. These boards need to be exactly at right angles to each
other, and they can't be allowed to move. Are there any premade
solutions for holding boards at right angles to each other? Surely
something like this exists?

Mount them in the corner of a box, with standoffs?

Good Luck!
Rich

Hot Melt glue ??

Maybe I wasn't specific enough... They need to be at exactly 90
degrees to each other. A degree error would be very significant...
Click to expand...
Aluminum block with a slot in it..
D from BC
 
Michael wrote:

On May 17, 1:23 pm, Donald <Don...@dontdoithere.com> wrote:

Rich Grise wrote:

On Wed, 16 May 2007 22:04:29 -0700, Michael wrote:

Hi - I am working on a board where I will have three PCBs at right
angles to each other. Thus they'll have one common corner and three
shared edges. These boards need to be exactly at right angles to each
other, and they can't be allowed to move. Are there any premade
solutions for holding boards at right angles to each other? Surely
something like this exists?

Mount them in the corner of a box, with standoffs?

Good Luck!
Rich

Hot Melt glue ??


Maybe I wasn't specific enough... They need to be at exactly 90
degrees to each other. A degree error would be very significant...

I do not believe you will find and off the shelf solution with less the
Click to expand...
1 degree error on each side.

Temperature will move any stand off or fastener beyond 1 degree true.

Sounds like a Stainless steel frame with holes for the boards.
Then the wiring can be anything you like.

The sides won't move after that.

Please send pictures of what ever you come up with.

donald
 
Michael <nleahcim@gmail.com> writes:
This would work if I didn't have as stringent of accuracy
requirements.
Click to expand...
So clamp them to a precision block before soldering.

http://www.grizzly.com/products/g5642
 
D from BC <myrealaddress@comic.com> wrote in
news:j14p43p1kvd9k7r9kc3e85uip2rmqr4ptu@4ax.com:

On Thu, 17 May 2007 11:23:02 -0600, Donald <Donald@dontdoithere.com
wrote:

Rich Grise wrote:

On Wed, 16 May 2007 22:04:29 -0700, Michael wrote:


Hi - I am working on a board where I will have three PCBs at right
angles to each other. Thus they'll have one common corner and three
shared edges.
Click to expand...
Like this; _|_ or like this; |_| ?

These boards need to be exactly at right angles to each
other, and they can't be allowed to move. Are there any premade
solutions for holding boards at right angles to each other? Surely
something like this exists?


Mount them in the corner of a box, with standoffs?

Good Luck!
Rich

Hot Melt glue ??


Row of wires out of one pcb soldered into the other

D from BC
Click to expand...
TEK used to use 1/4" aluminum blocks,drilled and tapped for 4-40 screws,one
block at each corner.

If you leave a strip or tabs of copper at the edges,you could solder the
PCBs together.
I've made boxes for detectors that way,using copper-clad epoxy-glass.


--
Jim Yanik
jyanik
at
kua.net
 
"Michael" <nleahcim@gmail.com> wrote in message
news:1179378269.543324.300650@e65g2000hsc.googlegroups.com...
Hi - I am working on a board where I will have three PCBs at right
angles to each other. Thus they'll have one common corner and three
shared edges. These boards need to be exactly at right angles to each
other, and they can't be allowed to move. Are there any premade
solutions for holding boards at right angles to each other? Surely
something like this exists?

Thanks!

-Michael
Click to expand...
Keystone makes threaded "L" brackets which could work. They look to be bent
in a pressbrake though and will most likely not give the sub 1 degree
accuracy you need. With that type of accuracy, you'll need a machined block.

Chris
 
Michael wrote:
These boards need to be exactly at right angles to each other,
and they can't be allowed to move.
Click to expand...
Have you priced 3-axis accelerometers
rather than trying to build your own?
 
On May 16, 10:04 pm, Michael <nleah...@gmail.com> wrote:
Hi - I am working on a board where I will have three PCBs at right
angles to each other. ... Are there any premade
solutions for holding boards at right angles to each other?
Click to expand...
There are two-part connectors for mounting cards to a motherboard;
DIN connectors like Nubus used (see DigiKey part # H1020-ND for
example). Of course, to fix three right-angle-edges, will take
a half dozen connectors. Figure $3 each...

A welded or brazed steel frame might be easiest in the long run.
You can fine-tune the angles easily, if your hammer skills are good.
 
On May 16, 10:04 pm, Michael <nleah...@gmail.com> wrote:
Hi - I am working on a board where I will have three PCBs at right
angles to each other. ... Are there any premade
solutions for holding boards at right angles to each other?
Click to expand...
There are two-part connectors for mounting cards to a motherboard;
DIN connectors like Nubus used (see DigiKey part # H1020-ND for
example). Of course, to fix three right-angle-edges, will take
a half dozen connectors. Figure $3 each...

A welded or brazed steel frame might be easiest in the long run.
You can fine-tune the angles easily, if your hammer skills are good.
 
On 17 May 2007 13:11:23 -0700, Michael <nleahcim@gmail.com> wrote:

On May 17, 1:53 pm, DJ Delorie <d...@delorie.com> wrote:
D from BC <myrealaddr...@comic.com> writes:

Row of wires out of one pcb soldered into the other

Put an exposed copper strip along each edge, and just solder the edges
directly together.


This would work if I didn't have as stringent of accuracy
requirements. They need to be at 90 degrees plus or minus a tenth of a
degree or so. Initial production numbers will be fairly low (~100) so
they will be hand assembled.
) soI wouldso
Click to expand...

Mill a groove (not through) in the PCB to be mated to that is a few
mils over one PCB thickness wide. Place the copper strips along each side
of the groove. Put copper on the edge of the mating PCB, and let the
groove be what maintains the right angle. Solder the strips. VIOLA!

As long as the PCB is rigid (use 90 mill PCB for the grooved one), you
are set. You can break up the strips into segments so they do not all
need to be soldered at once.

My fee is 0.25% of your net. :-]
 
On 17 May 2007 17:03:32 -0400, DJ Delorie <dj@delorie.com> wrote:

Michael <nleahcim@gmail.com> writes:
This would work if I didn't have as stringent of accuracy
requirements.

So clamp them to a precision block before soldering.

http://www.grizzly.com/products/g5642
Click to expand...

3 cm on a side is pretty small compared to those behemoths.

The bear growls... Grrrr.
 
On May 16, 10:04 pm, Michael <nleah...@gmail.com> wrote:
Hi - I am working on a board where I will have three PCBs at right
angles to each other. Thus they'll have one common corner and three
shared edges. These boards need to be exactly at right angles to each
other, and they can't be allowed to move. Are there any premade
solutions for holding boards at right angles to each other? Surely
something like this exists?
Click to expand...
How about attaching them to the outside of a cube? You would have to
keep all the components on one side to do it.

You may want to consider increasing the number of PCBs to six. The
unsupported corners are going to cause you trouble,
 
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