Solder resist ink
2006-10-02 by tukiel
Hello all, Does anyone know what silkscreen ink I should use for making solder resists (mask)? I have made many prototypes, but a nice thing to have would be a
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Re: Surface tension -- Direct to pcb printing
2006-10-02 by Andrew
... ST said something about failed tests not completly cleaned from the copper affecting the inkjet tests. I found something similar with toner transfer. (way
Re: Epson R220 printer - anyone made progress yet?
2006-10-02 by mycroft2152
... Hi Chris, I ve been working on it on and off. Toner transfer works well for me so this is more oF a as time permits and I need a break from something
Re: [Homebrew_PCBs] Surface tension -- Direct to pcb printing
2006-10-02 by Stefan Trethan
On Mon, 02 Oct 2006 19:59:17 +0200, Myc Holmes ... Well, Mycie, i don t mind having another test to quantify the effects of wetting
Re: [Homebrew_PCBs] Surface tension -- Direct to pcb printing
2006-10-02 by Myc Holmes
Sigh.... You missed the point again, Steffie. Once you have identified a property, and have a tool to measure the effects, the tool can be used to optimize the
Re: [Homebrew_PCBs] Surface tension -- Direct to pcb printing
2006-10-02 by Stefan Trethan
Yes, the thing is, this is easy to over-do. If you apply too much, say propylenglycol, you ll get ink running all over the place. BTW diluted ink (from a
Surface tension -- Direct to pcb printing
2006-10-02 by mycroft2152
Jam5411 s recent EUREKA moment with using the Simple Green wipes on a inkjet printed pcb got me to thinking. There has been a lot of discussion on the best
Re: [Homebrew_PCBs] Re: Etch resist tests added to Photos section
2006-10-02 by Lez
... Odd that you use so much heat, I was having problems with the toner not transfering to the board so used ore heat, it got better, I then uprated the
Re: [Homebrew_PCBs] Re: Etch resist tests added to Photos section
2006-10-02 by Stefan Trethan
On Mon, 02 Oct 2006 01:28:16 +0200, kilocycles ... Simply do not remove the paper from the other side. I used to align two papers, put
Re: Etch resist tests added to Photos section
2006-10-01 by kilocycles
Hi Stefan, I had been using 3M 33+ because it is very stretchy compared to other electrical tapes, and it conforms well. I have been running my fingernail
File - monthly.txt
2006-10-01 by Homebrew_PCBs@yahoogroups.com
Monthly Reminder, please read: Messages and threads: Please do NOT start a new thread by replying to another message. Even if you change the subject line
Re: [Homebrew_PCBs] UV LED arrays?
2006-10-01 by Henrik Olsson
Yep, the LED s they used where: Kingbright L-7113UVC. That particular LED has a 20 degree beam , they put 24 of them in a grid ~32mm appart. The distance from
Re: [Homebrew_PCBs] UV LED arrays?
2006-10-01 by Leon Heller
... From: yllawk To: Sent: Saturday, September 30, 2006 3:53 PM Subject: [Homebrew_PCBs] UV LED arrays?
RE: [Homebrew_PCBs] UV LED arrays?
2006-10-01 by Tony Smith
... They re the wrong wavelength, so they don t work anyway. Tony
Re: [Homebrew_PCBs] Etch resist tests added to Photos section
2006-09-30 by Stefan Trethan
On Sat, 30 Sep 2006 16:42:49 +0200, kilocycles ... I found the problem goes away if i rub the overlap with a fingernail to close it up.
UV LED arrays?
2006-09-30 by yllawk
Hi Folks, I m mostly a learning lurker on these tech exchange lists, but the recent UV source discussion has stimulated a question I ve been wondering about. I
Etch resist tests added to Photos section
2006-09-30 by kilocycles
Hi Group, After some inconsistent results on retouches and second-side masking, I did some test using some common pens and other materials. The photos of the
Re: UV Light Sources
2006-09-28 by derekhawkins
... Thought I was already in the dog house . LOL!
Re: UV Light Sources
2006-09-28 by Steve
... I don t know what you have against John Craddock, but I don t tolerate bullying. Derek, you are on moderated status. Steve Greenfield listowner
Re: [Homebrew_PCBs] Re: UV Light Sources - the MV HID
2006-09-28 by Adam Seychell
Also, remember window soda glass shuts off anything below 270nm so that includes _all_ UVB. I haven t done side by side comparisons between the various HID MV
Re: UV Light Sources
2006-09-27 by Steve
... Huh? I was taking Derek to task. How have I offended you? Steve Greenfield
Re: [Homebrew_PCBs] Re: UV Light Sources
2006-09-27 by Russell Shaw
... If you put a collimator (lens) in front of an isotropic light source such that the cone of interception is 90 degrees (quite efficient for a lense setup),
Re: [Homebrew_PCBs] UV Light Sources
2006-09-27 by william.kroyer@kilroysprojects.net
Just something else that occured to me in regards to MV bulbs put to use for photoresist. If you want to find them cheap/free make friends with some local
Re: [Homebrew_PCBs] Re: UV Light Sources
2006-09-27 by william.kroyer@kilroysprojects.net
So basically UVB is useless for photoresist and it s UVA output that s key? Wouldn t a full spectrum plant bulb work fairly well then? If I recall most put
RE: [Homebrew_PCBs] Re: UV Light Sources
2006-09-26 by John Craddock
... Well Steve you just created another lurker. Sorry I asked the question. Regards John C
Re: UV Light Sources
2006-09-26 by derekhawkins
... If you remove the reflector and put a collimator in front of the lamp you ll get your collimation without focus. Yes, nice low intensity parallel rays.
Re: [Homebrew_PCBs] Re: UV Light Sources
2006-09-26 by Russell Shaw
... That s just a roundabout way of saying you get the fastest exposure by focusing all the light to a smaller area, maximizing the power density. I designed
Re: [Homebrew_PCBs] Re: UV Light Sources
2006-09-26 by Zoran A. Scepanovic
Hello Leon, Tuesday, September 26, 2006, 9:52:31 AM, you wrote: Some snippings :) and replies inbetween the lines ... UV-C (UV-A) is long wave UV ... Good one!
Re: UV Light Sources
2006-09-26 by derekhawkins
... This is more to do with focus than collimation. Parallel rays would be better than divergent rays but convergent rays would even be better than parallel
Moderated Re: UV Light Sources
2006-09-26 by Steve
... I m sorry to do this, but since you continue to be combatative and are attempting to bait, you are now on moderated status. Steve Greenfield listowner
Re: UV Light Sources
2006-09-26 by Steve
... missed it; sorry we don t have any American schools in OZ. Your insinuation in the snide comment above is pretty dammed offensive and totally uncalled for
Re: [Homebrew_PCBs] Re: UV Light Sources
2006-09-26 by Leon Heller
... From: John Craddock To: Sent: Tuesday, September 26, 2006 4:07 AM Subject: RE:
RE: [Homebrew_PCBs] Re: UV Light Sources
2006-09-26 by John Craddock
... Thank you very much for that information Russell. Points like your experience on the exposure time and distance between light source and object provide a
Re: UV Light Sources
2006-09-26 by twb8899
... questions mixed in context below. ... There is ... or is it separate? The reflectors in my exposure unit are external to the lamp. They are made of thin
RE: [Homebrew_PCBs] Re: UV Light Sources
2006-09-26 by John Craddock
... That was precisely the reason for my question (see the first post on this thread). I understand from my web searching that UV-A is the radiation band that
Re: [Homebrew_PCBs] Re: UV Light Sources
2006-09-26 by Russell Shaw
... I made a UV lightbox with a 125Watt HID lamp (HPR-125) 24 from the glass, and in a cylindrical parabolic reflector (lamp lays horizontal). 90%+ exposure
Re: UV Light Sources
2006-09-26 by derekhawkins
... Missed what? Searching on mercury vapour
RE: [Homebrew_PCBs] Re: UV Light Sources
2006-09-25 by John Craddock
Tom, thank you very much for that information. I have a few questions mixed in context below. ... Is the reflector built into the globe i.e.. is it a PAR type
RE: [Homebrew_PCBs] Re: UV Light Sources
2006-09-25 by John Craddock
... Snip ... Derek FYI in the English language we spell vapor as vapour, so a search missed it; sorry we don t have any American schools in OZ. Your
Epson R220 printer - anyone made progress yet?
2006-09-25 by lcdpublishing
Hi guys, Just checking in to see if there has been any progress or successes yet with this model of printer. I am sort of stuck on a few other projects and
Re: UV Light Sources
2006-09-25 by derekhawkins
... Hear, hear!
Re: UV Light Sources
2006-09-25 by twb8899
We had two DMVL-930 exposure units for dry film photoresist and they used 1000 watt bulbs. When I closed the PWB plant I kept the best one for my home shop and
Re: UV Light Sources
2006-09-25 by derekhawkins
... Search these archives on Colight DMVL-930
Re: [Homebrew_PCBs] UV Light Sources
2006-09-25 by Leon Heller
... From: John Craddock To: Sent: Monday, September 25, 2006 8:13 AM Subject: RE:
RE: [Homebrew_PCBs] UV Light Sources
2006-09-25 by John Craddock
... Thanks Leon For the collimation I was going to use a parabolic reflector. With a 16 (400mm) dia., reflector it would seem to be feasible to have a working
Re: UV Light Sources
2006-09-25 by Andrew
... Yes the mecury vapour lamps work fine for PCB resist. Most expensive comercial machines use them I think. They also (as others have pointed out) need to
Re: [Homebrew_PCBs] UV Light Sources
2006-09-25 by Leon Heller
... From: John Craddock To: Sent: Monday, September 25, 2006 3:35 AM Subject: RE:
Re: Circuit design for the motivated beginner: How to proceed?
2006-09-25 by Steve
... Then you should add it to the Links! Steve Greenfield
Re: [Homebrew_PCBs] UV Light Sources
2006-09-25 by william.kroyer@kilroysprojects.net
Well mercury vapor bulbs are a popular choice for lighting amongst reptile owners because they offer a decent amount of UVB that is needed by a number of
RE: [Homebrew_PCBs] UV Light Sources
2006-09-25 by John Craddock
I read somewhere on the web that a mercury vapour lamp with the outer uv blocking envelope removed gives a very good source of uv light for photo-pcb resist