Solder Sample...

J

John Larkin

Guest
When we order PCBs, especially first time, we ask for a \"solder
sample\" board, which isn\'t guaranteed to be defect-free. I always glom
on the ss for my board collection.

I\'m not sure if the ss boards actually cost us more. Sometimes the
board houses deliberately wreck them to make them unusable.

I got a whole panel this time.

https://www.dropbox.com/s/k77j40jaonf490h/J270A_Solder_Sample_1.jpg?raw=1

I posted the start of this one, a long time ago.

https://www.dropbox.com/s/ns2fvffx49jd92a/J271_A1.jpg?raw=1

Things are going slow lately.
 
We do populated solder sample boards, actually a lot of them, just for production to play with

Weeds out solder problems or components that cannot handle the reflow profile
 
We do populated solder sample boards, actually a lot of them, just for production to play with

Weeds out solder problems or components that cannot handle the reflow profile
 
On 24/7/20 7:47 am, John Larkin wrote:
When we order PCBs, especially first time, we ask for a \"solder
sample\" board
Click to expand...

What is the purpose of these? Is it to check the quality of the fab\'s work?

CH
 
On 24/7/20 7:47 am, John Larkin wrote:
When we order PCBs, especially first time, we ask for a \"solder
sample\" board
Click to expand...

What is the purpose of these? Is it to check the quality of the fab\'s work?

CH
 
On 24/7/20 7:47 am, John Larkin wrote:
When we order PCBs, especially first time, we ask for a \"solder
sample\" board
Click to expand...

What is the purpose of these? Is it to check the quality of the fab\'s work?

CH
 
On Fri, 24 Jul 2020 10:57:23 +1000, Clifford Heath
<no.spam@please.net> wrote:

On 24/7/20 7:47 am, John Larkin wrote:
When we order PCBs, especially first time, we ask for a \"solder
sample\" board

What is the purpose of these? Is it to check the quality of the fab\'s work?

CH
Click to expand...

Presumably to test solderability. With ENIG gold, that\'s rarely an
issue nowadays, although we have seen some ratty gold. I like to have
a bare board around to look at. The really nice ones go up on the
wall.

https://www.dropbox.com/s/wloouba8qs40l7w/P951_PCB_1.JPG?raw=1





--

John Larkin Highland Technology, Inc

Science teaches us to doubt.

Claude Bernard
 
On Fri, 24 Jul 2020 10:57:23 +1000, Clifford Heath
<no.spam@please.net> wrote:

On 24/7/20 7:47 am, John Larkin wrote:
When we order PCBs, especially first time, we ask for a \"solder
sample\" board

What is the purpose of these? Is it to check the quality of the fab\'s work?

CH
Click to expand...

Presumably to test solderability. With ENIG gold, that\'s rarely an
issue nowadays, although we have seen some ratty gold. I like to have
a bare board around to look at. The really nice ones go up on the
wall.

https://www.dropbox.com/s/wloouba8qs40l7w/P951_PCB_1.JPG?raw=1





--

John Larkin Highland Technology, Inc

Science teaches us to doubt.

Claude Bernard
 
On Thu, 23 Jul 2020 14:47:49 -0700, John Larkin wrote:

When we order PCBs, especially first time, we ask for a \"solder sample\"
board, which isn\'t guaranteed to be defect-free. I always glom on the ss
for my board collection.

I\'m not sure if the ss boards actually cost us more. Sometimes the board
houses deliberately wreck them to make them unusable.

I got a whole panel this time.

https://www.dropbox.com/s/k77j40jaonf490h/J270A_Solder_Sample_1.jpg?
raw=1

I posted the start of this one, a long time ago.

https://www.dropbox.com/s/ns2fvffx49jd92a/J271_A1.jpg?raw=1

Things are going slow lately.
Click to expand...

What kind of rating would you give SF circuits? I know of
them but never used them. I have a project in the work that
will need a couple of boards, one will be a panel of small,
probably 1 x 1.5 in, boards.



--
Chisolm
Texas-American
 
On Thu, 23 Jul 2020 14:47:49 -0700, John Larkin wrote:

When we order PCBs, especially first time, we ask for a \"solder sample\"
board, which isn\'t guaranteed to be defect-free. I always glom on the ss
for my board collection.

I\'m not sure if the ss boards actually cost us more. Sometimes the board
houses deliberately wreck them to make them unusable.

I got a whole panel this time.

https://www.dropbox.com/s/k77j40jaonf490h/J270A_Solder_Sample_1.jpg?
raw=1

I posted the start of this one, a long time ago.

https://www.dropbox.com/s/ns2fvffx49jd92a/J271_A1.jpg?raw=1

Things are going slow lately.
Click to expand...

What kind of rating would you give SF circuits? I know of
them but never used them. I have a project in the work that
will need a couple of boards, one will be a panel of small,
probably 1 x 1.5 in, boards.



--
Chisolm
Texas-American
 
On Fri, 24 Jul 2020 09:22:34 -0500, Joe Chisolm
<jchisolm6@earthlink.net> wrote:

On Thu, 23 Jul 2020 14:47:49 -0700, John Larkin wrote:

When we order PCBs, especially first time, we ask for a \"solder sample\"
board, which isn\'t guaranteed to be defect-free. I always glom on the ss
for my board collection.

I\'m not sure if the ss boards actually cost us more. Sometimes the board
houses deliberately wreck them to make them unusable.

I got a whole panel this time.

https://www.dropbox.com/s/k77j40jaonf490h/J270A_Solder_Sample_1.jpg?
raw=1

I posted the start of this one, a long time ago.

https://www.dropbox.com/s/ns2fvffx49jd92a/J271_A1.jpg?raw=1

Things are going slow lately.

What kind of rating would you give SF circuits? I know of
them but never used them. I have a project in the work that
will need a couple of boards, one will be a panel of small,
probably 1 x 1.5 in, boards.
Click to expand...

I\'ll ask, but we are unforgiving of bad board vendors. We mostly use
Cirexx and Gorilla. We do always require bare-board testing.

That panel sure looks good, and the breakaway scores are really nice.

Lately we panelize anything smaller than, say, 4x6 inches. That panel
has three fiducials on each side, in the corners. We usually have
fiducials on the individual boards, too.



--

John Larkin Highland Technology, Inc

Science teaches us to doubt.

Claude Bernard
 
On Fri, 24 Jul 2020 09:22:34 -0500, Joe Chisolm
<jchisolm6@earthlink.net> wrote:

On Thu, 23 Jul 2020 14:47:49 -0700, John Larkin wrote:

When we order PCBs, especially first time, we ask for a \"solder sample\"
board, which isn\'t guaranteed to be defect-free. I always glom on the ss
for my board collection.

I\'m not sure if the ss boards actually cost us more. Sometimes the board
houses deliberately wreck them to make them unusable.

I got a whole panel this time.

https://www.dropbox.com/s/k77j40jaonf490h/J270A_Solder_Sample_1.jpg?
raw=1

I posted the start of this one, a long time ago.

https://www.dropbox.com/s/ns2fvffx49jd92a/J271_A1.jpg?raw=1

Things are going slow lately.

What kind of rating would you give SF circuits? I know of
them but never used them. I have a project in the work that
will need a couple of boards, one will be a panel of small,
probably 1 x 1.5 in, boards.
Click to expand...

I\'ll ask, but we are unforgiving of bad board vendors. We mostly use
Cirexx and Gorilla. We do always require bare-board testing.

That panel sure looks good, and the breakaway scores are really nice.

Lately we panelize anything smaller than, say, 4x6 inches. That panel
has three fiducials on each side, in the corners. We usually have
fiducials on the individual boards, too.



--

John Larkin Highland Technology, Inc

Science teaches us to doubt.

Claude Bernard
 
On Thu, 23 Jul 2020 14:47:49 -0700, John Larkin wrote:

When we order PCBs, especially first time, we ask for a \"solder sample\"
board, which isn\'t guaranteed to be defect-free. I always glom on the ss
for my board collection.

I\'m not sure if the ss boards actually cost us more. Sometimes the board
houses deliberately wreck them to make them unusable.

I got a whole panel this time.

https://www.dropbox.com/s/k77j40jaonf490h/J270A_Solder_Sample_1.jpg?
raw=1

I posted the start of this one, a long time ago.

https://www.dropbox.com/s/ns2fvffx49jd92a/J271_A1.jpg?raw=1

Things are going slow lately.
Click to expand...

What kind of rating would you give SF circuits? I know of
them but never used them. I have a project in the work that
will need a couple of boards, one will be a panel of small,
probably 1 x 1.5 in, boards.



--
Chisolm
Texas-American
 
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