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2005-05-06 by rruss45826@aol.com
In a message dated 5/6/2005 12:41:53 A.M. Eastern Daylight Time, robert.hedan@videotron.ca writes: Are there other dangers besides sound waves? I can easily
2005-05-06 by Robert Hedan
Are there other dangers besides sound waves? I can easily protect against that, I have high-quality ear protectors used at the firing range. If a chamber
2005-05-06 by rruss45826@aol.com
In a message dated 5/5/2005 4:32:33 P.M. Eastern Daylight Time, stefan_trethan@gmx.at writes: And most importantly: remember vacuum chanber failures are
2005-05-06 by rruss45826@aol.com
In a message dated 5/5/2005 4:07:58 P.M. Eastern Daylight Time, robert.hedan@videotron.ca writes: Hi, I m fabricating my own vacuum chamber right now. I m
2005-05-06 by Brian Clancy
Grant. Light bulbs contain inert gas at atmospheric pressure. Vacuum tubes (thermionic valves) contain? a vacuum. This is why the glass is so much thicker than
2005-05-05 by Earl T. Hackett, Jr.
I didn t get the start of this thread so I m getting in late. I take it that the object is to make some custom connectors. I do this routinely to make
2005-05-05 by Stefan Trethan
On Thu, 05 May 2005 19:57:19 -0000, Robert Hedan ... there is a good group on casting (casting@yahoogropups.com). Go there! You can basically degass both, the
2005-05-05 by Robert Hedan
Hi, I m fabricating my own vacuum chamber right now. I m using a pressure cooker and 2 venturi pumps (PneuAire) connected to a ordinary shop air compressor.
2005-05-02 by Earl T. Hackett, Jr.
laser beams are almost perfectly columinated. You just have to control dot size. The simplest technique would be to use a pinhole just a bit smaller than the
2005-05-02 by Steve
I think he means he wants to collimate a UV laser beam. Steve Greenfield ... .0254mm UV
2005-05-02 by Steve
A high resolution projector is 1024x768. At 6x4, that is about 180ppi, give or take. As a comparison, most find that for toner transfer a 600dpi laser printer
2005-05-02 by Earl T. Hackett, Jr.
I gather that you re using the CNC table to move a board under a UV source, much like a Gerber plotter. Years ago this was called direct imaging. The
2005-05-02 by Brian Clancy
G day I haven t tried it myself but I one saw reference to using the eggcrate diffuser for flourescent lights and painting it matt black to eliminate
2005-05-02 by Cristian C
Anyone knows where to order an UV Collimator? I m working to replace the mill on a CNC Milling Machine with a .0254mm UV beam, on presensitivized PCB. Cristian
2005-05-01 by skippy_0410e
High everyone, I ve just joined your group even though I ve been cruising this site for a while. I m a member over at cnczone (great site) and I started a
2005-05-01 by Homebrew_PCBs@yahoogroups.com
Monthly Reminder, please read: Subject lines: Remember to change the subject line if you are straying from the original thread. Please change the subject line
2005-04-29 by mikezcnc
www.diptrace.com among many other benefits it allows routing PCBs aswell as drilling. Free to 250 nodes. Cheap for a full version. Mike ... the ... from ...
2005-04-26 by zaheer abbas
HELLO TO ALLL THE MEMBERS OF THIS GROUP .I AM A BEGINNER SO PLZ HELP ME IN PCB DESIGN __________________________________________________ Do You Yahoo!?
2005-04-26 by Jeff Cooper
I failed to hit the answer to this with a search but I m sure it has been described. I have a Sears Craftsman dremel tool I bought some time ago and kept in
2005-04-26 by Phil
... wrote: ... setup to accurately cut PCBs to size? ... they any good? ... a nice job of cutting PCBs? I have used a shear (with a nice
2005-04-26 by Hermod Pedersen
... That was my aim -- alas, I failed at my first attempt with photo resist. Being unsure whether the board was exposed long enough, I got another board, fired
2005-04-25 by Stefan Trethan
rOn Mon, 25 Apr 2005 15:47:08 -0400, Roy J. Tellason ... Glassfiber reinforced. Phenolic paper will not dull the bits as quickly i assume. If the hole quality
2005-04-25 by Roy J. Tellason
... Is this assuming any particular board material?
2005-04-25 by Martin Haverland
you are surely right about hole quality... but it fits my needs until now :-) and the hss i just had around in a fairly high amount... ... speed...works ok for
2005-04-25 by Stefan Trethan
On Mon, 25 Apr 2005 18:58:55 +0200, Martin Haverland ... While i agree with most of your post, HSS drills do not produce holes of the same quality as carbide
2005-04-25 by Martin Haverland
... From: Martin Haverland To: Sent: Monday, April 25, 2005 5:55 PM Subject: Re: [Homebrew_PCBs] Re:
2005-04-25 by Leon Heller
... From: Hermod Pedersen To: Sent: Sunday, April 24, 2005 10:56 PM Subject: [Homebrew_PCBs]
2005-04-25 by JanRwl@AOL.COM
In a message dated 4/24/2005 8:51:45 P.M. Central Daylight Time, hermod.pedersen@bolina.hsb.se writes: I wonder if the amount of etch solution could influence
2005-04-25 by Stefan Trethan
On Sun, 24 Apr 2005 23:56:15 +0200, Hermod Pedersen ... Depends on etching solution (which one) and board size, copper thickness, area, ... IF there is not
2005-04-25 by Ben H. Lanmon
... are they any ... holes with ... their drill press ... one of the ... runout (15% ... table. Drilling Well I agree that the Dremel is not the best but
2005-04-24 by Hermod Pedersen
I wonder if the amount of etch solution could influence the result -- as I would like to use a smaller plastic container with a transparent lid (less etchant,
2005-04-24 by Stefan Trethan
... That s true but i avoid traces at the edges anyway and do no plating of holes. I have a small table saw with carbide blade, but most times i avoid the
2005-04-24 by Bill Blackburn
Hi Guys Does anyone know of a PCB Program that will produce CNC files for the Milling machine directly without using a second program to convert from DXF, etc?
2005-04-24 by JanRwl@AOL.COM
In a message dated 4/23/2005 10:20:54 P.M. Central Daylight Time, uhmgawa@member.fsf.org writes: While I ve used shearing in the past, I d rather not do so if
2005-04-24 by JanRwl@AOL.COM
In a message dated 4/23/2005 9:19:29 P.M. Central Daylight Time, rruss45826@aol.com writes: Boards can easily be cut to size on a band saw. I also use this
2005-04-24 by uhmgawa
... While I ve used shearing in the past, I d rather not do so if I had a choice. Shearing stresses are rather broadly distributed compared to sawing,
2005-04-24 by rruss45826@aol.com
In a message dated 4/23/2005 6:17:28 P.M. Eastern Daylight Time, JanRwl@AOL.COM writes: 1). Cutting boards Does anyone know of a suitable mini saw
2005-04-24 by retired0
... setup to ... much good, ... blade. The ... they any ... a nice ... do more ... have ... slightly-large ... holes with ... drill press ... For small
2005-04-23 by JanRwl@AOL.COM
In a message dated 4/23/2005 2:48:58 P.M. Central Daylight Time, email.me@kevp.com writes: And changing the subject away from Toner Transfer!!! ;-) ] 1).
2005-04-23 by Stefan Trethan
On Sat, 23 Apr 2005 20:47:58 +0100, Kev Pearce (kevp.com) ... Sheet metal shears/scissors. Either handheld or the bench variety, all works well. Tile saws are
2005-04-23 by Kev Pearce (kevp.com)
Hi all, I ve been making homebrew PCBs for a while using the blue Press-and-Peel and getting good results. I was wondering if anyone could help with tips on
2005-04-23 by Steve
Don t discount the Files, Photos, Links and Database sections of the list. Some links about using cheaper paper, from the Toner Transfer folder in Links:
2005-04-23 by vignesh e
Hi all, I am a newbie in this group so i go off with a question straight away. I heard about this group in yet another forum through ST and joined here. I am
2005-04-22 by Dave Mucha
You can Google PCB trace calculator. probably one of the most common softwares we use. Dave ... copper, so ... there is ... while ago.
2005-04-20 by lcdpublishing
Thanks Stefan - that was what I needed! Chris ... copper, so ... a ... there is ... while ago.
2005-04-20 by Stefan Trethan
On Wed, 20 Apr 2005 12:58:08 -0000, lcdpublishing ... In the links section, folder design rules, i have put a link a while ago. ST
2005-04-20 by lcdpublishing
Hi Group, Are there any guidelines as to the relationship between trace thickness (width, I guess) and the current it can handle? I know that copper clad
2005-04-20 by Leon Heller
Electronics Weekly has an article on a new UK initiative started by Circatex with government backing to develop inkjet printing for PCB manufacture:
2005-04-20 by Adam Seychell
... Dremal s are designed for engraving, grinding and other small low precision odd ball jobs. I would suggest you look at industrial die grinders or
2005-04-19 by Tobias Gogolin
Another question how about Negative Iron On Transfers with following electroplating (first copper then an etch resistent metal) Are they using tin ? What i am