Dwayne's advice is dead on. It works really well. The only problem I've ever had was the wire-wrap wire coming unsoldered at the top, and that was because there was another pad right next to the failed one which transferred heat up to the top. I re-did it with the wire-wrap wire wrapped between the two pads and all was well.?
I've also pulled a variation of this trick in the past when working with a part that has a flexible, but large lead (power cap) which wouldn't fit through the hole after the wire-wrap wire was in place.Take the component lead, and bend a little loop in it, which will lay flat against the top of the PCB, contacting the remaining top layer pad or trace before going through the hole. Insert remaining lead through hole, bend over so it contacts bottom layer pad / trace, solder top and bottom.?
Obviously that won't work with a lead which isn't accessible from the top after component placement. Some components can be lifted up enough to provide access and have long enough leads to pull that trick, but many don't.?
|
hmmmmm....?? I have WW wire....? I have to play with
that idea.
I got WW wire to experiment with radio building.
BIG mistake.
Pretty much concluded that loose wires pick up hand capacitance
and 60Hz hum
while etched PCB cures all sorts of that noise.
which sent me down the home brew pcbs path
On 06/11/2018 02:21 PM, Dwayne Reid
wrote:
toggle quoted message
Show quoted text
My usual way to fix a board with a missing PTH is to either simply
patch
from the pin to the next closest node on the bottom of the board
**or**
scrape the solder mask from the top-side trace, run a piece of 30
AWG
bare wire-wrap wire through the hole, lay the wire on top of the
top-side
trace and solder.? Yhen install the component through the hole and
solder the wire-wrap wire to the component lead.
I do have an expensive kit that replaces through-hole plating that
I will
use on the rare occasion that demands a cosmetically-perfect
repair.? It is extremely reliable when done properly but the kit
is
darned expensive.? Most repairs don't require using this
kit.
dwayne
At 05:31 PM 6/10/2018, Jim Pruitt wrote:
Can someone recommend a pc board eyelet and tools for pc board
repair.?? I have tried to contact intl-eyelets at
multiple times but gotten no response.?? I thought their
F-3093-C
eyelet was what I was looking for.?? I need to repair a pc
board
where a 4 pin .1" spacing header strip pulled the plating out
of the
hole.?? So I need an eyelet that will accept a .025" square
pin.?? From researching this in the past it seemed the swaging
tool
was outrageously expensive ($200).?? Since this is for a one
time
thing I can't justify that kind of money but would like to
find some
eyelets.?? What other outfits are out there that sell
eyelets??? Are there any cheap anvil tools for inserting the
eyelets
and seating them?
Thank you.
Jim Pruitt
|
My usual way to fix a board with a missing PTH is to either simply patch
from the pin to the next closest node on the bottom of the board **or**
scrape the solder mask from the top-side trace, run a piece of 30 AWG
bare wire-wrap wire through the hole, lay the wire on top of the top-side
trace and solder.? Yhen install the component through the hole and
solder the wire-wrap wire to the component lead.
I do have an expensive kit that replaces through-hole plating that I will
use on the rare occasion that demands a cosmetically-perfect
repair.? It is extremely reliable when done properly but the kit is
darned expensive.? Most repairs don't require using this
kit.
dwayne
At 05:31 PM 6/10/2018, Jim Pruitt wrote:
Can someone recommend a pc board eyelet and tools for pc board
repair.?? I have tried to contact intl-eyelets at
multiple times but gotten no response.?? I thought their F-3093-C
eyelet was what I was looking for.?? I need to repair a pc board
where a 4 pin .1" spacing header strip pulled the plating out of the
hole.?? So I need an eyelet that will accept a .025" square
pin.?? From researching this in the past it seemed the swaging tool
was outrageously expensive ($200).?? Since this is for a one time
thing I can't justify that kind of money but would like to find some
eyelets.?? What other outfits are out there that sell
eyelets??? Are there any cheap anvil tools for inserting the eyelets
and seating them?
Thank you.
Jim Pruitt
_._,_._,_
--
Dwayne Reid?? <dwayner@...>
Trinity Electronics Systems Ltd??? Edmonton, AB,
CANADA
780-489-3199 voice?? 780-487-6397 fax??
888-489-3199 Toll Free
Custom Electronics Design and Manufacturing
|
?
You might try .? I purchased
items?on there
to make a switch.? Nice folks to deal with.
?
73,
Charlie, N0TT
?
On Sun, 10 Jun 2018 16:31:42 -0700 "Jim Pruitt" < jpruitt67@...> writes:
Can someone recommend a pc board eyelet and tools for pc
board repair.? I have tried to contact intl-eyelets at
multiple
times but gotten no response.? I thought their F-3093-C eyelet was what I
was looking for.? I need to repair a pc board where a 4 pin .1" spacing
header strip pulled the plating out of the hole.? So I need an eyelet
that will accept a .025" square pin.? From researching this in the past
it seemed the swaging tool was outrageously expensive ($200).? Since this
is for a one time thing I can't justify that kind of money but would like to
find some eyelets.? What other outfits are out there that sell
eyelets?? Are there any cheap anvil tools for inserting the eyelets and
seating them?
Thank you.
Jim Pruitt
?
|
Sort thru this: -- Paul Mateer, AA9GG
Elan Engineering Corp.
NAQCC 3123, SKCC 4628
|
Can someone recommend a pc board eyelet and tools
for pc board repair.? I have tried to contact intl-eyelets at
multiple times but gotten no response.? I thought their F-3093-C
eyelet was what I was looking for.? I need to repair a pc board
where a 4 pin .1" spacing header strip pulled the plating out of
the hole.? So I need an eyelet that will accept a .025" square
pin.? From researching this in the past it seemed the swaging tool
was outrageously expensive ($200).? Since this is for a one time
thing I can't justify that kind of money but would like to find
some eyelets.? What other outfits are out there that sell
eyelets?? Are there any cheap anvil tools for inserting the
eyelets and seating them?
Thank you.
Jim Pruitt
|
Re: Seems like we moved + pcb fab idea.
Hi guys
Check this out from Marco Reps
All his videos have some great info. He has PCB laser etching nailed. He's done this one and some following on how he upgraded it. Amazing results possible.
You can get the engraver here:
and a UV laser 405nm which has a sharper focused dot (see Marco Rep's videos) than the 445nm ones here:
Got one myself but they're so cool it's got used for everything other than etching PCBs. Soon though....
Andy.
|
Re: Seems like we moved + pcb fab idea.
Guys, Check the videos out by this guy. (Marco Reps) You can get the kit from banggood: and a 405nm laser which has a better focussed dot than the 445nm ones.
See Marco Reps videos. This guy has it nailed. Search him on Youtube. All you'll ever need to know on PCB laser etching.
Bought one myself but they're so cool I've used it for everything else but PCBs so far.?
Andy.
|
Re: Means of going from a pdf file board image to a file to engrave from?
Here is a PDF to Gerber converter:
Leon
On Thursday, 7 June 2018, 17:58, Leon via Groups.Io <leon355@...> wrote:
Sorry, it looks like I was wrong about Pulsonix being able to convert from PDF to Gerber. It does work the other way round, but that isn't much use.
Leon
On Thursday, 7 June 2018, 17:31, LEON HELLER <leon355@...> wrote:
The Pulsonix PCB software I use can convert PDF files to Gerbers. I could probably convert that file for you.
Leon
On Thursday, 7 June 2018, 13:03, Tony Smith <ajsmith1968@...> wrote:
You can convert the scanned image to a vector image, the vector can be used to run the engraver. Eg: https://www.dropbox.com/s/x9qc7bqdt3m9l9x/traces-bw.dxf?dl=0That was done using CorelDraw with the default setting so can be improved on.? CorelDraw doesn't do the best job, but I already had it open.? I usually use VectorMagic for this stuff. InkScape has an image to vector converter as well, that's free but I've not used the converter. Tony
> -----Original Message----- > From: [email protected] [mailto: [email protected]] On > Behalf Of Chris Wilson > Sent: Thursday, 7 June 2018 9:44 PM > To: [email protected]> Subject: [homebrewpcbs] Means of going from a pdf file board image to a file > to engrave from? > > 07 June 2018 > > > I? restore old test gear and sometimes have to make new boards as some > old? PCB's suffer from poor track adhesion when repairs are attempted. > I have fixed up a huge linear bench DC power supply but really I would > like to make new boards. I use a thermal wax printer to put the layout > taken? from? a Photoshop modded photograph of an original single sided > board? onto clear sheet and then use photo resist to make a board. but > I'd? like to get an engraver and try that method. Hence I need a means > of going from a black and white pdf image to a file suitable to run on > the? engraver.? Any ideas if this is possible and if so how to achieve > this? please?? There's? a? link? to the images I would want to convert > here, the images are actual size: > > http://www.chriswilson.tv/traces-bw.pdf> > Thanks? for? any ideas! A means to convert to a format a pcb fab house > could? work with is another possibility, I am happy to drill the holes > manually on my milling machine. > > > > -- > > > Best regards, >? Chris? ? ? ? ? ? ? ? ? ? ? ? ? ? mailto: chris@...> > >
|
Re: Means of going from a pdf file board image to a file to engrave from?
Sorry, it looks like I was wrong about Pulsonix being able to convert from PDF to Gerber. It does work the other way round, but that isn't much use.
Leon
On Thursday, 7 June 2018, 17:31, LEON HELLER <leon355@...> wrote:
The Pulsonix PCB software I use can convert PDF files to Gerbers. I could probably convert that file for you.
Leon
On Thursday, 7 June 2018, 13:03, Tony Smith <ajsmith1968@...> wrote:
You can convert the scanned image to a vector image, the vector can be used to run the engraver. Eg: https://www.dropbox.com/s/x9qc7bqdt3m9l9x/traces-bw.dxf?dl=0That was done using CorelDraw with the default setting so can be improved on.? CorelDraw doesn't do the best job, but I already had it open.? I usually use VectorMagic for this stuff. InkScape has an image to vector converter as well, that's free but I've not used the converter. Tony
> -----Original Message----- > From: [email protected] [mailto: [email protected]] On > Behalf Of Chris Wilson > Sent: Thursday, 7 June 2018 9:44 PM > To: [email protected]> Subject: [homebrewpcbs] Means of going from a pdf file board image to a file > to engrave from? > > 07 June 2018 > > > I? restore old test gear and sometimes have to make new boards as some > old? PCB's suffer from poor track adhesion when repairs are attempted. > I have fixed up a huge linear bench DC power supply but really I would > like to make new boards. I use a thermal wax printer to put the layout > taken? from? a Photoshop modded photograph of an original single sided > board? onto clear sheet and then use photo resist to make a board. but > I'd? like to get an engraver and try that method. Hence I need a means > of going from a black and white pdf image to a file suitable to run on > the? engraver.? Any ideas if this is possible and if so how to achieve > this? please?? There's? a? link? to the images I would want to convert > here, the images are actual size: > > http://www.chriswilson.tv/traces-bw.pdf> > Thanks? for? any ideas! A means to convert to a format a pcb fab house > could? work with is another possibility, I am happy to drill the holes > manually on my milling machine. > > > > -- > > > Best regards, >? Chris? ? ? ? ? ? ? ? ? ? ? ? ? ? mailto: chris@...> > >
|
Re: Means of going from a pdf file board image to a file to engrave from?
The Pulsonix PCB software I use can convert PDF files to Gerbers. I could probably convert that file for you.
Leon
On Thursday, 7 June 2018, 13:03, Tony Smith <ajsmith1968@...> wrote:
You can convert the scanned image to a vector image, the vector can be used to run the engraver. Eg: https://www.dropbox.com/s/x9qc7bqdt3m9l9x/traces-bw.dxf?dl=0That was done using CorelDraw with the default setting so can be improved on.? CorelDraw doesn't do the best job, but I already had it open.? I usually use VectorMagic for this stuff. InkScape has an image to vector converter as well, that's free but I've not used the converter. Tony
> -----Original Message----- > From: [email protected] [mailto: [email protected]] On > Behalf Of Chris Wilson > Sent: Thursday, 7 June 2018 9:44 PM > To: [email protected]> Subject: [homebrewpcbs] Means of going from a pdf file board image to a file > to engrave from? > > 07 June 2018 > > > I? restore old test gear and sometimes have to make new boards as some > old? PCB's suffer from poor track adhesion when repairs are attempted. > I have fixed up a huge linear bench DC power supply but really I would > like to make new boards. I use a thermal wax printer to put the layout > taken? from? a Photoshop modded photograph of an original single sided > board? onto clear sheet and then use photo resist to make a board. but > I'd? like to get an engraver and try that method. Hence I need a means > of going from a black and white pdf image to a file suitable to run on > the? engraver.? Any ideas if this is possible and if so how to achieve > this? please?? There's? a? link? to the images I would want to convert > here, the images are actual size: > > http://www.chriswilson.tv/traces-bw.pdf> > Thanks? for? any ideas! A means to convert to a format a pcb fab house > could? work with is another possibility, I am happy to drill the holes > manually on my milling machine. > > > > -- > > > Best regards, >? Chris? ? ? ? ? ? ? ? ? ? ? ? ? ? mailto: chris@...> > >
|
Re: Means of going from a pdf file board image to a file to engrave from?
You can convert the scanned image to a vector image, the vector can be used
to run the engraver.
Eg:
That was done using CorelDraw with the default setting so can be improved
on. CorelDraw doesn't do the best job, but I already had it open. I
usually use VectorMagic for this stuff.
InkScape has an image to vector converter as well, that's free but I've not
used the converter.
Tony
toggle quoted message
Show quoted text
-----Original Message-----
From: [email protected] [mailto:[email protected]] On
Behalf Of Chris Wilson
Sent: Thursday, 7 June 2018 9:44 PM
To: [email protected]
Subject: [homebrewpcbs] Means of going from a pdf file board image to a file to engrave from?
07 June 2018
I restore old test gear and sometimes have to make new boards as some
old PCB's suffer from poor track adhesion when repairs are attempted.
I have fixed up a huge linear bench DC power supply but really I would
like to make new boards. I use a thermal wax printer to put the layout
taken from a Photoshop modded photograph of an original single sided
board onto clear sheet and then use photo resist to make a board. but
I'd like to get an engraver and try that method. Hence I need a means
of going from a black and white pdf image to a file suitable to run on
the engraver. Any ideas if this is possible and if so how to achieve
this please? There's a link to the images I would want to convert
here, the images are actual size:
Thanks for any ideas! A means to convert to a format a pcb fab house
could work with is another possibility, I am happy to drill the holes
manually on my milling machine.
--
Best regards,
Chris mailto:chris@...
|
Means of going from a pdf file board image to a file to engrave from?
07 June 2018
I restore old test gear and sometimes have to make new boards as some
old PCB's suffer from poor track adhesion when repairs are attempted.
I have fixed up a huge linear bench DC power supply but really I would
like to make new boards. I use a thermal wax printer to put the layout
taken from a Photoshop modded photograph of an original single sided
board onto clear sheet and then use photo resist to make a board. but
I'd like to get an engraver and try that method. Hence I need a means
of going from a black and white pdf image to a file suitable to run on
the engraver. Any ideas if this is possible and if so how to achieve
this please? There's a link to the images I would want to convert
here, the images are actual size:
Thanks for any ideas! A means to convert to a format a pcb fab house
could work with is another possibility, I am happy to drill the holes
manually on my milling machine.
--
Best regards,
Chris mailto:chris@...
|
Re: Seems like we moved + pcb fab idea.
We’re not dealing with thousands of watts like the ‘experts’ who always chime in think we are, you don’t need much power to burn off paint.? Like the earlier link said he only used 2 watts. ? The beam will scatter somewhat (it’s painted copper after all), plus defocus going through the lens, and it’s a long back to the tube through the mirrors.? It’s not going to have much power left after that. ? For the equipment we’re using it’s a non-issue.? I’m sure someone has a friend of friend who heard about it… ? It obviously works, I really should try it. ? Tony ? ? ?
toggle quoted message
Show quoted text
From: [email protected] [mailto:[email protected]] On Behalf Of David Lyon
Sent: Thursday, 7 June 2018 5:52 PM
To: [email protected]
Subject: Re: [homebrewpcbs] Seems like we moved + pcb fab idea.? Alter the angle of the laser to fire at 15-degrees so that it doesn't shoot back on itself.? ? ? ? On Thu., 7 Jun. 2018, 08:18 anode505 via Groups.Io, <anode505=[email protected]> wrote: Still wouldn't use a CO2.? Back reflections are the issue. Ever see a resonator after the beam goes back into it? That happens at the pierce or etching (which is what you are doing).? Once the cut starts its typically OK (unless you lose the cut)
CO2 & copper is a gamble I wouldn't take.
But for that application I'd just get a like a 5w-7W LED and roll.
|
Re: Seems like we moved + pcb fab idea.
Alter the angle of the laser to fire at 15-degrees so that it doesn't shoot back on itself.?
On Thu., 7 Jun. 2018, 08:18 anode505 via Groups.Io, <anode505= [email protected]> wrote: Still wouldn't use a CO2.? Back reflections are the issue. Ever see a resonator after the beam goes back into it? That happens at the pierce or etching (which is what you are doing).? Once the cut starts its typically OK (unless you lose the cut)
CO2 & copper is a gamble I wouldn't take.
But for that application I'd just get a like a 5w-7W LED and roll.
|
Re: Seems like we moved + pcb fab idea.
Glass tube?? ? What resonator? ? With flying mirrors? ? Ain’t gunna happen. ? We’re not cutting either, so the beam is going to get reflected back all the time. ? Still ain’t gunna happen. ? It’s more likely to happen with a laser diode. ? Tony ? ?
toggle quoted message
Show quoted text
From: [email protected] [mailto:[email protected]] On Behalf Of anode505 via Groups.Io
Sent: Thursday, 7 June 2018 8:18 AM
To: [email protected]
Subject: Re: [homebrewpcbs] Seems like we moved + pcb fab idea.? Still wouldn't use a CO2.? Back reflections are the issue. Ever see a resonator after the beam goes back into it? That happens at the pierce or etching (which is what you are doing).? Once the cut starts its typically OK (unless you lose the cut)
CO2 & copper is a gamble I wouldn't take.
But for that application I'd just get a like a 5w-7W LED and roll.
|
Re: Seems like we moved + pcb fab idea.
Still wouldn't use a CO2.? Back reflections are the issue. Ever see a resonator after the beam goes back into it? That happens at the pierce or etching (which is what you are doing).? Once the cut starts its typically OK (unless you lose the cut)
CO2 & copper is a gamble I wouldn't take.
But for that application I'd just get a like a 5w-7W LED and roll.
|
Re: Seems like we moved + pcb fab idea.
This is the sort of thing he’s describing: ? Sticking a laser diode onto a 3D printer works because they’re both lightweight machines that need to move relatively fast, while a router moves slower but needs a stronger frame. ? So you end up somewhere between an under-built router and an over-built printer that’s really really expensive. ? For the price of just that ZMorph laser head you can buy one of those 40W Chinese lasers off eBay.? A bit rubbish, but hey, laser! ? 3D printers are moving towards that changeable tool head model because that’s one way of being able to automatically change out colours or material types, and it’s not too hard to make one of the heads a laser or basic drill or whatever.? Then resin will become cheap and we’ll all switch to that. ? People put 3D print heads onto milling machines, it works but mills are usually too slow.? Plus do you really want your milling machine running a 30 hour job? ? Tony ? ?
toggle quoted message
Show quoted text
From: [email protected] [mailto:[email protected]] On Behalf Of Anton Krug
Sent: Wednesday, 6 June 2018 6:40 PM
To: [email protected]
Subject: Re: [homebrewpcbs] Seems like we moved + pcb fab idea.? ? On Wed, Jun 6, 2018 at 6:03 AM, r.d. terramir <terramircomputers@...> wrote: Ok 3d printers are all the rage. I myself built one like 7+ years ago? But I have a fab idea based on a laser cutter idea I have seen. They used black matt paint and laser ed away the paint and etched the board. #1 I dun think burning away paint is all that healthy #2 I think it could be done simpler #3 could use 3 small steppers one for the z tool head. X&Y two more either drilling tool head for the holes after #4 And a spring loaded needle to scratch away the paint the fine point of the needle should allow for spaces between ?tracks that are about 5 to 8 mil. #5 So smd's should be possible and a syringe tool head should allow for solder paste dispensing as well tool paths should be availible as well. ?
|
Re: Seems like we moved + pcb fab idea.
Sounds like you've just described a CNC machine. I have one like this:
... and it was less than ?200 at Christmas. If you are wedded to the paint idea (to later etch), then you replace the bit with a needle and experiment whether rotating the needle has benefits. If that doesn't work out then you can put the cutting bit back and mill the tracks as DuWayne shows in the above link.
73
Tony G4WIF
|
Re: Seems like we moved + pcb fab idea.
toggle quoted message
Show quoted text
On Wed, Jun 6, 2018 at 6:03 AM, r.d. terramir <terramircomputers@...> wrote: Ok 3d printers are all the rage. I myself built one like 7+ years ago? But I have a fab idea based on a laser cutter idea I have seen. They used black matt paint and laser ed away the paint and etched the board. #1 I dun think burning away paint is all that healthy #2 I think it could be done simpler #3 could use 3 small steppers one for the z tool head. X&Y two more either drilling tool head for the holes after #4 And a spring loaded needle to scratch away the paint the fine point of the needle should allow for spaces between ?tracks that are about 5 to 8 mil. #5 So smd's should be possible and a syringe tool head should allow for solder paste dispensing as well tool paths should be availible as well. What you folks think terramir
|
AA9GG
Leon