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Old 21st April 2007, 11:28 PM   #31
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Quote:
Originally Posted by unbwogable
Bobledeux:
I have a question about the pulsar etching system. Does it work that great? I have some of the paper, and I can't get the toner to transfer for crap! I've tried a dozen different copiers, and I've tried a clothes iron, and two differents heat laminators. Suggestions?
I know this is a bit stale but if the poster is still here.

I use the Pulsar system and it works very well.

Some simple questions?

What is the problem you are having.
Is the toner not attaching to the paper?
Is the paper not letting go of the toner?
Is the toner not sticking to the copper?
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BCHS/3v0's Tutorials
Junebug USB PIC programmer kit., USB Bit Whacker,
The 15 Minute Printed Circuit Board! (+drill time)
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Old 26th October 2007, 07:04 PM   #32
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How can i drill the PCB board without Cracks (It will soon broken when i drill it..............
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Old 26th October 2007, 08:41 PM   #33
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What is the substrate PCB material ?
Some are more prone to breaking then others. Fiberglass would be good.

Use a sharp bit.

Do not push, let the drill do the cutting. Small bits heat quickly. Forcing them makes it worse. Hot drills go dull quickly. May only last a few holes.

Carbide bits stay sharper longer but break easily unless you use a drill press or drill stand. You should be using a drill stand or drill press.

Use a CNC machine
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Old 26th October 2007, 09:04 PM   #34
Default You forgot ..........

Quote:
Originally Posted by 3v0
What is the substrate PCB material ?
Some are more prone to breaking then others. Fiberglass would be good.

Use a sharp bit.

Do not push, let the drill do the cutting. Small bits heat quickly. Forcing them makes it worse. Hot drills go dull quickly. May only last a few holes.

Carbide bits stay sharper longer but break easily unless you use a drill press or drill stand. You should be using a drill stand or drill press.

Use a CNC machine
....... one of the most important things, drill speed (RPM), the higher the better.
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Old 26th October 2007, 10:23 PM   #35
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Quote:
Originally Posted by Rolf
....... one of the most important things, drill speed (RPM), the higher the better.
Yup left that out.

To understand why small drills require high RPM you need to consider how fast the edge of the bit is moving. The edge speed is
edgeSpeed = pi* drillDiameter*rpm

The slower the bit edge moves the slower you need to feed the bit into the work. It is easy to ruin HSS bits by feeding them too fast at low rpm.

What sort of drill are you using ?
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Old 27th October 2007, 12:33 AM   #36
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I use a dremel and one of these:http://www.amazon.com/gp/product/B00...d_i=B0000302Y5

Works like a charm, and you can get a board finished much faster than free-handing it.
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Old 27th October 2007, 04:17 AM   #37
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One problem I have with the HCL etchant is that if you dont mix it correctly, it washes off the ink right off the board
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Old 27th October 2007, 06:02 PM   #38
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Man, that is good. I always had used ferric chloride to etch my boards. Ill try this new stuff soon.
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Old 28th October 2007, 02:38 PM   #39
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Quote:
Originally Posted by Hero999
Press-n-Peel is a waste of money, I just use ordinary magazine paper.
Having tried many methods over the years, including printing onto magazine pages,photo-resist etc. and I would say Press-n-Peel is one on the best I have found. It is quick, easy and fast and I have had spectacular results for my SMD work and double sided boards, with achievable edge definition and fine track widths far better than using paper. I use laser labels to stick correctly sized pieces of P-n-P to normal A4 sheets and have not had a 'jam' on my laser printer yet. As for cost, a 20 sheet pack shipped to Sheffield UK from Techniks in the USA is US$64.50 or about £33.00 which compared to Maplin where you get 5 sheets for £15.52 which is almost twice the price at £3.10 per sheet ! and you have to collect.
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Old 29th October 2007, 06:50 AM   #40
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Quote:
Originally Posted by Krumlink
One problem I have with the HCL etchant is that if you dont mix it correctly, it washes off the ink right off the board
Even with straight 38% HCl, the ink I use, Brother brand, does not dissolve. What kind of ink are you using? I would try out another type if you can. When I was using OfficeMax to make the copies I did not have that problem either. I use a small amount of solution and immerse it while wiping gently with a sponge, and the only problem I had was the ink from OfficeMax chipping. I can rub pretty hard without the Brother ink coming off.

Last edited by Ambient; 29th October 2007 at 06:53 AM.
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Old 29th October 2007, 11:13 PM   #41
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I used permanent marker (sharpie)

It works great if you have 2:1 Mixture, but dont experiment with different values. It works best.
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Old 7th November 2007, 08:31 AM   #42
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check out this site for PCB
http://technofreek.com/index.php?pg=10017
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Old 11th May 2008, 05:30 AM   #43
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Quote:
Originally Posted by Hero999
Heck, I use photo resist board for real PCBs, it doesn't work out that expensive, it's probably cheaper than Press-n-Peel.

It's easy to build a UV exposure, the cheapest way is to lay your board with the artwork on top on a table held down with a peice of glass. Use compact black light for the UV source, the easiest way is to put it in an old desk lamp and direct the beam at your PCB.

http://www.maplin.co.uk/Module.aspx?...ia=UV&doy=25m8

I know there are probably cheaper places to buy these from and don't use the incandesant type they're crap and don't last for very long.

Look, here are some cheaper alternatives:
http://www.blacklight.com/items/FTBPESL13T-BLB
http://www.bulbman.com/index.php?mai...ducts_id=11675 - needs a holder with ballast though.
http://www.doityourself.com/invt/0307207
do you use that UV lamp for presensitized pcb? i don't think a black light can develop the presensitized pcb
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Old 24th June 2008, 11:22 AM   #44
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What is the common commercial name for Hydrogen Peroxide?

TIA
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Old 25th June 2008, 01:26 AM   #45
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I've never heard any other name. Wikipedia lists:

μ-1κO,2κO’-Dioxidodihydrogen
Dihydrogen dioxide
Hydrogen dioxide
Dioxidane
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