black photoresist masters - darkening
2005-07-25 by hjf2k2
Hi all, I m still working on the serigraphy emulsion system. I think I need to increase the exposure time to burn the emulsion a little more. The problem is
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Re: Experimental method
2005-07-25 by hjf2k2
... It s just a 40W fluorescent lamp, just a cheap light for the storage area (that s a wooden platform which divides the 4 meter ceiling into two 2-meter
[Homebrew_PCBs] Pulsar technique materials
2005-07-25 by Robert Hedan
Hi, I d like to know what you people think of the last 2 steps in the Pulsar technique: - applying pure silver powder over the traces (available from
[Homebrew_PCBs] Pulsar toner tranfer technique
2005-07-25 by Robert Hedan
I ve posted a pic in to give a general idea of the quality of the etch I was able to achieve. I m hopeful that others will
New file uploaded to Homebrew_PCBs
2005-07-25 by Homebrew_PCBs@yahoogroups.com
Hello, This email message is a notification to let you know that a file has been uploaded to the Files area of the Homebrew_PCBs group. File :
Re: Experimental method
2005-07-25 by Bob_xyz
... wrote: ... or cut ... make wave ... Perhaps this might be a good use for the non-stick Reynolds aluminum foil that someone
[Homebrew_PCBs] Re: Experimental method
2005-07-25 by Robert Hedan
Ok, finished downloading. I love it! It s great seeing people from around the world use different techniques and material to achieve the same goal. I nearly
[Homebrew_PCBs] Re: Experimental method
2005-07-25 by Robert Hedan
I m taking pictures of every step of the Pulsar process and taking notes on problems that pop up along the way. So far, I think the Pulsar technique is the
Re: [Homebrew_PCBs] Experimental method-jamming
2005-07-25 by Radra
I too encountered the jamming problem with 0.062 material. Refer to message 7700 for a different solution. Lyman
Re: Experimental method
2005-07-24 by hjf2k2
Hey everyone. I posted the pictures as promised. Here they are: http://groups.yahoo.com/group/Homebrew_PCBs/files/PhotoEtching/ It s a RAR file with the
RE : RE : [Homebrew_PCBs] Re: what if - drilling under water
2005-07-24 by Robert Hedan
Ooops, I see now you ve already discussed this idea. One note, if you have the shopvac higher relative to the drill, you can use gravity to move the water, no
RE : [Homebrew_PCBs] Re: what if - drilling under water
2005-07-24 by Robert Hedan
Simple, use the water along with a water-type shopvac (I think they all are). The water stops dirt particles from going airborn, and the shopvac stops the
Re: what if - drilling under water
2005-07-24 by lcdpublishing
... to ... That device is commonly referred to as a Slinger and it works great in a variety of similar applications. Chris
Re: [Homebrew_PCBs] Re: what if - drilling under water
2005-07-24 by Stefan Trethan
On Sun, 24 Jul 2005 16:17:01 +0200, lcdpublishing ... I think with open sides on the drill there is no way it lifts the water up. I do think people overreact
Re: what if - drilling under water
2005-07-24 by lcdpublishing
OH, and I forget to mention also! As you know, water and electricity make for nasty enemies! Depending on the helix angle of the drill (or other cutting tool)
Re: [Homebrew_PCBs] Re: what if - drilling under water
2005-07-24 by Stefan Trethan
On Sun, 24 Jul 2005 14:58:24 +0200, lcdpublishing ... Well, most seems to be fine dust when drilling in air. But sometimes fibers seem to stick together and
Re: [Homebrew_PCBs] what if - drilling under water
2005-07-24 by Stefan Trethan
On Sun, 24 Jul 2005 15:02:47 +0200, Leon Heller ... Ok, thanks. I ve had bubbling before, never thought it might be not enough dryig time but it might well be.
Re: [Homebrew_PCBs] what if - drilling under water
2005-07-24 by Leon Heller
... From: Stefan Trethan To: Sent: Sunday, July 24, 2005 11:58 AM Subject: [Homebrew_PCBs] what if -
Re: what if - drilling under water
2005-07-24 by lcdpublishing
Hi Stefan, The process of drilling metal under water I have done in the past - usually with very hard steels and at very slow spindle speeds. FOr PCBs, there
[Homebrew_PCBs] what if - drilling under water
2005-07-24 by Stefan Trethan
Hi, whille looking around for a shop vac to catch drilling dust i had an idea. If i set up the CNC for EDM anyway, why not simply drill the boards under water?
Re: RE : RE : [Homebrew_PCBs] Experimental method
2005-07-24 by Stefan Trethan
... Maybe the others don t use a carrier, and it isolates the board better. ST
Re: RE : RE : [Homebrew_PCBs] Experimental method
2005-07-24 by Phil
passing .064 material through the stock H200 was an exercise in nasty noises. .032 did just fine though. post mods (see next paragraphs) it mostly works ok.
Re: RE : [Homebrew_PCBs] Experimental method
2005-07-24 by hjf2k2
... Yes, i promise, I ll post pics. About the design rules, shame on me, I have no idea, I just press buttons on the Eagle CAD software because English
Re: Experimental method
2005-07-24 by hjf2k2
Exactly. It s a clear, odorless liquid, they called it a decapant , the guy who sold it to me said it was ecological , thus, safe to go down the drain.
Re: RE : [Homebrew_PCBs] Experimental method
2005-07-24 by hjf2k2
... Yes, as soon as I get a digital camera :) tomorrow maybe.
Re: Experimental method
2005-07-24 by hjf2k2
... Yes, it s called POLI-X-SOL, but you won t find it on the US because it seems to be a local brand for my country (Argentina). It s the cheapest one, the
RE : RE : [Homebrew_PCBs] Experimental method
2005-07-24 by Robert Hedan
Phil, I can t speak for the H200, but from the point of view of the H300, the mods are useless. I can t for the life of me figure out how it alters anything.
Re: Experimental method
2005-07-23 by Bob_xyz
Could you tell us the brand name of the emulsion you used, what sort of quantities are available, and its shelf life? Do you have any indication as to how well
Re: RE : [Homebrew_PCBs] Experimental method
2005-07-23 by Phil
I agree - post the pixs please! He didn t say how the board came out, what kind of design rules (trace width, etc), cleaning ... It would be also good to
Re: Experimental method
2005-07-23 by Bob_xyz
Screen cleaner should strip it off easily. When a silk screen is done with a job, it can be cleaned of the cured emulsion and reused. Regards, Bob
Re: Experimental method
2005-07-23 by lcdpublishing
Is there a way to get the Cured emulsion off of the traces after etching? ... water. ... curing.
RE : [Homebrew_PCBs] Experimental method
2005-07-23 by Robert Hedan
Can you posts pics please? I m really curious as to how it came out. I m trying out the Pulsar technique right now and I like it. I had some messing-up
Experimental method
2005-07-23 by hjf2k2
Hi all, i ve been testing a way to make photo etching cheap n easy. I went to a Screen-print shop and bought photosensitive emulsion, the cheapest type. I
Re: RE : [Homebrew_PCBs] CuCl
2005-07-23 by Stefan Trethan
Oh i don t mind it either to show an ID when buying such chemicals, but what i fear is that it will be less available in general if it is a hassle to sell. I
RE : [Homebrew_PCBs] CuCl
2005-07-23 by Robert Hedan
I bought acetone just yesterday, but then again I live in a rural area (potatoe field next door, had a pig farm a mile away, dairy farm on the way to
Re: [Homebrew_PCBs] Re: Uneven etching problem
2005-07-23 by Adam Seychell
... Yes, I ve done that before and it seems to work a 2nd time just ok. Note: the residue is invisible. I ve seen it as an extremely thin clear film that peals
Re: Uneven etching problem
2005-07-23 by Bob_xyz
If the short etch does show signs of residue, can the board be rinsed and additional developing attempted? Or is it all over at that point? Regards, Bob ...
Re: [Homebrew_PCBs] Uneven etching problem
2005-07-23 by Adam Seychell
... Is does appear like your getting uneven etching. There are two main causes. 1) non-uniform solution agitation. 2) photoresist residue. To solve problem 1,
[Homebrew_PCBs] CuCl
2005-07-22 by Stefan Trethan
Hi, just wondering, has anyone noticed trouble buying CuCl chemicals? I mean after the London bombs i would be slightly apprehensive buying HCl, H2O2, and
Another Reynolds paper
2005-07-22 by curtgood
Hi, I am a newbie, and this is first post. Have enjoyed reading all the ideas, and when I came to the one on Reynolds Parchment paper, I thought it would be
Re: [Homebrew_PCBs] Uneven etching problem
2005-07-22 by Russell Shaw
... I agree. The solution is to lay the board flat in a shallow container of ferric chloride and do the etching by brushing the etcher over the pcb with a
Re: Uneven etching problem
2005-07-21 by Phil
How are you getting circulation of your etchant? I don t know if that s your problem but when I ve had uneven etching, it s been due to poor circulation. A
Re: [Homebrew_PCBs] Uneven etching problem
2005-07-21 by Leon Heller
... From: Stuart Wallace To: Sent: Thursday, July 21, 2005 4:59 PM Subject: [Homebrew_PCBs] Uneven etching
[Homebrew_PCBs] Re: PCB copper clad board
2005-07-21 by Robert Hedan
Phil, You should start a list of interested parties like we did on the Electronics_101 group. I m interested in a cheap source of PCB as well, keep me
Uneven etching problem
2005-07-21 by Stuart Wallace
Hi, Bit of a ramble -- sorry about this... I ve recently developed a bit of a problem with my etching process and I m hoping that someone can give me some
Re: [Homebrew_PCBs] Re: Another rookie starts a high volume pcb project.
2005-07-21 by Stefan Trethan
On Thu, 21 Jul 2005 16:44:33 +0200, Mike Phillips ... i go to a shop that sells chemicals, there is get everything i want really cheap
Re: Another rookie starts a high volume pcb project.
2005-07-21 by Mike Phillips
You were correct. The bottle is labeled 32.something percent. Where might I generally find 30% Hydrogen Peroxide? I wonder a bottle from Radio Shack would be
CNC router images - may be useful if you are making a CNC PCB machine
2005-07-20 by lcdpublishing
Hi everyone, This CNC router is something of a work in progress - eventually it will be presented in our magazine as a project. During the last few months or
RE: [Homebrew_PCBs] need ideas - linear bearings for cnc
2005-07-20 by D. Daniel McGlothin
David, I don t have ideas, as such, but a pointer to a current project from which you might get a few. Your machine has been admired from afar, over on one of
need ideas - linear bearings for cnc
2005-07-20 by David McNab
Hi, It doesn t need to be said that the makeshift linear bearing and transport I ve been using with my CNC setup (http://www.freenet.org.nz/cnc) is less than