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Old 14th September 2014, 08:28 PM   #1
kees52 is offline kees52  Netherlands
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Default Printing PCB film on a laserprinter.

Hi All


I ahve print a circuit board on a laserprinter for toner transfer, it work but when I do a double sided one i do see the printer is not excact, because of the top pcb is mirorred it do count x 2 when it is not at right 90 degree angles, I hope I say it right.

Have someone do now this? because how bigger the pcb how more problems with pads are out of line.

I have a samsung cheap laser, I think I go find a professional one but it will always be not precise with mirorred angles.

last photo is a transfer test.

regards

kees
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File Type: jpg ScreenHunter_254 Sep. 14 17.17.jpg (104.3 KB, 501 views)
File Type: jpg ScreenHunter_253 Sep. 14 17.16.jpg (87.2 KB, 496 views)
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Old 14th September 2014, 08:36 PM   #2
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You could try putting some registration marks on each side of the pcb.
Do this in opposite corners.
These could then be lined up when placing transfer.
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Old 14th September 2014, 09:24 PM   #3
kees52 is offline kees52  Netherlands
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Quote:
Originally Posted by nigelwright7557 View Post
You could try putting some registration marks on each side of the pcb.
Do this in opposite corners.
These could then be lined up when placing transfer.
this is not the problem, real problem is that when i do put marks excactly in line a part of the pad holes do not align, this is because of the laserprinter do not print precisely when one layer (top) is mirrored.

Maybe there is a solution, use a better printer but do now somebody what kind.

I have a big hp printer 1200 dpi postcript, these did wel but is broken.

regards

jees
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Old 14th September 2014, 11:07 PM   #4
JMFahey is offline JMFahey  Argentina
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Be careful that your printer does not "fit to page" , always select "scale=none".

I'm worried that your first images shows thin white horizontal lines ... why?

And when printing both sides on the same sheet at the same time, (only certain way that they match ), one of them must be mirrored by choosing "X flip" or "Y flip" , not by rotating it 90 degrees.

Anyway the example you show does not seem to be a dual layer PCB but a single layer (bottom) + silkscreen (top) and in that case exact location is not *that* critical .
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Old 14th September 2014, 11:28 PM   #5
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Quote:
Originally Posted by JMFahey View Post
I'm worried that your first images shows thin white horizontal lines ... why?
I've seen that many times in PDF images I've made. They aren't present when printed.

Quote:
Originally Posted by kees52 View Post
I have a big hp printer 1200 dpi postcript, these did wel but is broken.
1200DPI is not needed. I've none dozens of surface mount boards with extremely small pads and thin traces and I always use 600DPI.

If you want good laser printer see if you can find a Samsung ML-2525W for a reasonable price (or a similar Samsung model). I've had mine for a few years now and absolutely love the thing. I've refilled the starter cartridge 3 times and I've yet to see a single streak or blemish in the prints.

When I do double sided boards I do one side and then drill some pads using a very small bit and use pins in the holes to align the transfer for the other side.

Last edited by theAnonymous1; 14th September 2014 at 11:31 PM.
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Old 15th September 2014, 12:51 AM   #6
kees52 is offline kees52  Netherlands
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Hi All

I have a samsung laserprinter ML-2165 600 dpi printer./

The lines in the print is not seen in real, I have done a screen capture from the ghostscript I using.

My problem is when print for example a square box and mirror one of them she do not fit anymore but has a mis alignment with this printer, most caused by the printer system who is most plastic. and so I get not the layers aligned, also not when drill smal holes and align it, yes soms pads in wone corner is oke, but on the other side it is not, and how bigger the pcb how more it do mis align.

If I do print both without mirror the top layer everything is fine, so printer mechanics is not exact horizontal of how it needs to be.

When i do single sides pcb then this problem is not a problem.

coming week she bring a HP 4100TN 1200 dpi print I have bought one hour ago, this professional postcript printer do a much better job, I have one but these was defective.

Afcourse a real hp penplotter do the best job, this is real precise when flip one square get lines also then in line.

PS it is a double sided board of a allfet amplifier.

thanks for all the reactions.
regards

kees
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File Type: jpg ScreenHunter_256 Sep. 15 02.03.jpg (113.6 KB, 449 views)
File Type: jpg ScreenHunter_257 Sep. 15 02.04.jpg (124.6 KB, 419 views)
File Type: jpg ScreenHunter_253 Sep. 14 17.16.jpg (87.2 KB, 70 views)

Last edited by kees52; 15th September 2014 at 01:07 AM.
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Old 15th September 2014, 01:23 PM   #7
JMFahey is offline JMFahey  Argentina
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If you print both sides at the same time, in the same sheet, side by side (of course they must be able to fit side by side in the same sheet !!!) , any mechanical irregularity will happen in both at the same time, so they will still match.

In that case use "X flip" on one to mirror, so the same edge is on top on both.
And print sheet vertical (portrait) , not "landscape" , because no matter what you do on screen, the paper sheet will always be printed along the longest axis.

If it does not fit side by side on the same sheet, then print one per sheet, one X mirrored of course, so although in different sheets they will both travel the same way, both will have the same side on top.

Not as accurate as the other method but better than nothing.
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Old 15th September 2014, 02:07 PM   #8
kees52 is offline kees52  Netherlands
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I have the problem that with ghost postcript I can not do two at the same page, so I need a good program what will work, pdf I hear is not precise 100% don,t get why this is in computer age.

maybe you have some idea,s then I go try.

printing one per sheet I have done, these have to much mechanical error, and how bigger the pcb how wurse it get.

But first remove conduit virus, I had 432 infections, spite that I have malwarebytes and avira antivirus, she have now my negative advise on twitter,

regards

kees

Last edited by kees52; 15th September 2014 at 02:11 PM.
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Old 15th September 2014, 05:14 PM   #9
Krisfr is offline Krisfr  United States
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Download and run ADWCleaner from Bleeping Computer.
http://www.bleepingcomputer.com/download/adwcleaner
works good against Conduit...
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Old 15th September 2014, 05:24 PM   #10
kees52 is offline kees52  Netherlands
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Quote:
Originally Posted by Krisfr View Post
Download and run ADWCleaner from Bleeping Computer.
http://www.bleepingcomputer.com/download/adwcleaner
works good against Conduit...
It is done, by spyhunter, good program find a lot.

If people can advise me how to get the two ps-inverter postscript into one sheet and the do a x flip
I am happy, I can find not much about the postcript. eagle can only export inverted postscript.

thanks for your advise.

regards

Last edited by kees52; 15th September 2014 at 05:34 PM.
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