Re: PCB EDM MILL Initial Tests
2006-05-03 by curt_rxr
... wrote: Well done Roger! ... Roger I used brass wire and distilled water and had arranged the servo circuit to feed the wire via a pinch roller and worm
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RE: [Homebrew_PCBs] Toner Transfer Methodology
2006-05-03 by Mark Mickelsen
Thanks very much for this help. One big problem is finding a way to move the images around so that they print at different places on the page. I don t have
Re: G3 fax - Good news and Bad News
2006-05-03 by Andrew
... Yeah - I looked at G4 - it does about 25% to 50% better compression on pictures that look like PCBs. I was however planning on using an atmel with only 8K
Re: G3 fax - was EDM Lasers and marraige - was re: homebrew laser plotter
2006-05-03 by Andrew
... Roger - I missed this part in the TIFF FAQ Question 7. Can I not stream TIFF? Why does my library need seeking forward and backward
Re: [Homebrew_PCBs] Blue CuCl etchant...
2006-05-03 by William Kroyer
I can t give specifics. Others have worked it out. The etch reaction is: CuCl2 + Cu -- 2CuCl Where CuCl2 is supposed to be bright green, and CuCl is brown
Re: PCB EDM MILL Initial Tests
2006-05-03 by Chris Horne
Roger, how small do you need to go ? probaly smaller than 0.6mm.. pity.. 0.6mm Mig welding wire is cheap stiff and freely available. Mild Steel would be the
Re: [Homebrew_PCBs] Blue CuCl etchant...
2006-05-03 by Herbert E. Plett
... in other words: you are pouring more pure etchant into the weakened solution! __________________________________________________ Do You Yahoo!? Tired of
Re: [Homebrew_PCBs] Re: G3 fax - Good news and Bad News
2006-05-03 by Dave Hylands
Hi Andrew, ... G4 should give even better compression. It requies a bit more memory to decompress since you need to use the previous line as a reference line.
Re: Blue CuCl etchant...
2006-05-03 by Bill Westfield
... Yeah. See for instance here: http://members.optusnet.com.au/~eseychell/PCB/etching_CuCl/index.html#operate_acid (or our own archives.) The etch reaction
Re: PCB EDM MILL Initial Tests
2006-05-03 by Andrew
... I don t understand why independant control would be advantagous. The EDM was going to be done raster not vector. However - I agree that extra wires would
Re: PCB EDM MILL Initial Tests
2006-05-03 by Andrew
... AND ... But what will I do with unused goats if the wire EDM works sans goats ? andrewm - I d rather be nekkid than wear a thin film of goat blood.
Re: PCB EDM MILL Initial Tests
2006-05-03 by Andrew
... ... YAY
Re: G3 fax - Good news and Bad News
2006-05-03 by Andrew
... Thanks - I suspected that there would be 1001 free librarys on the PC to do tiff. I wanted to try decode it myself so I knew I could re-write the code in
Re: [Homebrew_PCBs] Blue CuCl etchant...
2006-05-02 by William Kroyer
CuCl can be regenerated. It already has copper in it to begin with. It seems to me that when etching you are actually just making more CuCl. I ve only
Re: G3 fax - Good news and Bad News
2006-05-02 by Andrew
... No problems. BMP files are pretty easy to read. I will have a play around with them in the next few days. For my purposes - I will still need to compress
Re: [Homebrew_PCBs] Blue CuCl etchant...
2006-05-02 by Herbert E. Plett
... regenerated? NO, - degenerated! etching is essentially the process of converting metallic copper into water soluble salts. if you have an etchant and
[Homebrew_PCBs] Re: Direct inkjet resist on 1.6mm FR4 results
2006-05-02 by Robert Hedan
Wouldn t just a few drops of black make the yellow very visible? Robert
Re: Direct inkjet resist on 1.6mm FR4 results
2006-05-02 by warrenbrayshaw
To Volkan and others printing with the Yellow MISPRo ink If you get the opportunity, perhaps you could try viewing your ink mix under Black light . If it
RE: [Homebrew_PCBs] Toner Transfer Methodology
2006-05-02 by Herbert E. Plett
... very important: make absolutely sure the scale factor is right, or the holes and pads will not match! ... sure: don t print directly on the expensive
[Homebrew_PCBs] RE : PCB EDM MILL Initial Tests
2006-05-02 by Robert Hedan
A short video would be ever so cool for nerds like me who have never seen this type of machine. I can host it for you for a while too. Robert
Re: [Homebrew_PCBs] PCB EDM MILL Initial Tests
2006-05-02 by Alan King
... Yep hadn t thought on it in a while, but doesn t look like much you can do beyond having the electrode negative and spark power etc. If only you could
Re: [Homebrew_PCBs] Re: PCB EDM MILL Initial Tests
2006-05-02 by Lez
or mallwart
Re: PCB EDM MILL Initial Tests
2006-05-02 by javaguy11111
Since some have suggested carbon electrodes you might try .3mm or .5mm mechanical pencil leads. I have no way of knowing if they would be appropriate,but might
Re: PCB EDM MILL Initial Tests
2006-05-02 by lcdpublishing
Roger, I am not real familiar with EDM, but I do recall that the two materials used for electrodes were carbon (for sinker types) and Brass for Wire EDMs. In
Re: [Homebrew_PCBs] PCB EDM MILL Initial Tests
2006-05-02 by Stefan Trethan
Electrode erosion is quite normal with EDM, it is not a fault as such that can be eliminated. Probably can be reduced though.. ST
Re: [Homebrew_PCBs] PCB EDM MILL Initial Tests
2006-05-02 by Stefan Trethan
We were even considering a rotating electrode and a diamond wheel automatic sharpening station back then. Try graphite, they use it for EDM sinkers. Probably
Re: [Homebrew_PCBs] PCB EDM MILL Initial Tests
2006-05-02 by Codesuidae
... What is the linear feedrate for this? Or, alternatively, about how many square cm of copper are removed per minute? Dave K
Re: [Homebrew_PCBs] PCB EDM MILL Initial Tests
2006-05-02 by roger lucas
Hi Stefan, I know that it should have worked in theory, but I was surprised at how well it actually turned out. I tried with tinned copper wire and a tinned
Re: [Homebrew_PCBs] PCB EDM MILL Initial Tests
2006-05-02 by Stefan Trethan
Good to hear you got such good results. I don t have any specific concerns why it would not work, never had after some manual tests with a simple power supply.
Re: PCB EDM MILL Initial Tests
2006-05-02 by lcdpublishing
VERY COOL! ;-) I am glad to hear that no goats were harmed in the production of those EDM cut PCBs :-) Chris ... just 7p a photo http://uk.photos.yahoo.com
Re: [Homebrew_PCBs] PCB EDM MILL Initial Tests
2006-05-02 by Alan King
... Don t you want to try changing every other variable first, to see if you can eliminate the erosion problem first, then adjust everything else to match?
PCB EDM MILL Initial Tests
2006-05-02 by roger lucas
Well, I finally motivated myself this holiday weekend to get my PCB EDM lash-up to cut copper, and, YES, it does cut clean lines thru the copper without board
Re: [Homebrew_PCBs] Another VERY CHEAP paper that works pretty good....
2006-05-02 by JanRwl@AOL.COM
In a message dated 5/2/2006 8:52:38 A.M. Central Daylight Time, stefan_trethan@gmx.at writes: Personally i prefer to have sheets clear of any printing, and i
OT: Re: [Homebrew_PCBs] Toner. Inkjet, photoprocess discussion, Was--> Easy t
2006-05-02 by javaguy11111
... http://www.shipslasers.com/
Re: [Homebrew_PCBs] Re: G3 fax - Good news and Bad News
2006-05-02 by roger lucas
Andrew, I have just completed some EDM tests (see separate post), and certain requirements have come to light which means that ideally I would like to read a
Re: [Homebrew_PCBs] Re: G3 fax - Good news and Bad News
2006-05-02 by Dave Hylands
Hi Andrew, ... Just an FYI. I ve used the libtiff library (www.libtiff.org) on previous projects and it seems to work quite well. It also has lots of utilities
Re: [Homebrew_PCBs] G3 fax - was EDM Lasers and marraige - was re: homebrew laser plotter
2006-05-02 by roger lucas
Andrew, I am very interested in your approach, code etc etc, although I will probably use a PIC for the raster handling since I already have a PIC controlling
Re: Another VERY CHEAP paper that works pretty good....
2006-05-02 by lcdpublishing
Darn it! I sure wish that ink would get there for you. I probably wrote Ink on the darn customs lable and that probably held it up on this end too if they
Re: [Homebrew_PCBs] Another VERY CHEAP paper that works pretty good....
2006-05-02 by Leon Heller
... From: Stefan Trethan To: Sent: Tuesday, May 02, 2006 2:51 PM Subject: Re: [Homebrew_PCBs] Another
Re: [Homebrew_PCBs] Another VERY CHEAP paper that works pretty good....
2006-05-02 by Stefan Trethan
People have reported good results before with paper from magazines and catalogs. Personally i prefer to have sheets clear of any printing, and i don t mind the
Another VERY CHEAP paper that works pretty good....
2006-05-02 by lcdpublishing
Well, Having run out of the paper I was using (don t know what it was but it transferred consistantly), I had to try something else today. I found the AD
Re: [Homebrew_PCBs] Re: Easy toner transfer using relatively cheap Mall-Wart paper.
2006-05-02 by Stefan Trethan
On Tue, 02 May 2006 14:26:45 +0200, Leon Heller ... well i had a few boards where it didn t. I finally got it off with that pausklar oil to make paper
Re: Easy toner transfer using relatively cheap Mall-Wart paper.
2006-05-02 by Andrew
... I have seen a brand of neg-acting board someone was using do something similar. Thankfully the Kinsten ones I buy have never let me down
Re: [Homebrew_PCBs] Re: Easy toner transfer using relatively cheap Mall-Wart paper.
2006-05-02 by Leon Heller
... From: Stefan Trethan To: Sent: Tuesday, May 02, 2006 1:13 PM Subject: Re: [Homebrew_PCBs] Re:
Re: [Homebrew_PCBs] Re: Easy toner transfer using relatively cheap Mall-Wart paper.
2006-05-02 by Stefan Trethan
... Well, mine don t come with no such nonsense ;-) But then, i had huge trouble with the black lightproof covering on the photoboards. It would leave black
Re: G3 fax - Good news and Bad News
2006-05-02 by Andrew
... Well - The good news and bad news. The good news is I wrote a quick and dirty TIFF file decoding application in C on the PC this afternoon. The bad news is
Re: Easy toner transfer using relatively cheap Mall-Wart paper.
2006-05-02 by Andrew
... 5 or 10 seconds - I could never get off the sticky gummy stuff that comes courtesy of Dick Smith Electronics price stickers in that amount of time. They
Re: [Homebrew_PCBs] Re: Toner Transfer Methodology
2006-05-02 by Leon Heller
... From: Mark Mickelsen To: Sent: Tuesday, May 02, 2006 10:01 AM Subject: RE: [Homebrew_PCBs]
Re: [Homebrew_PCBs] Re: Toner Transfer Methodology
2006-05-02 by Stefan Trethan
For combining the views onto one sheet i use paint shop pro. The old versions (around 6) are quite cheap on ebay and much better than the new versions. You
Re: [Homebrew_PCBs] Blue CuCl etchant...
2006-05-02 by Stefan Trethan
Your gut feeling is right, blue color indicates a lack of HCl. Even if you add H2O2 it will just not do anything. There may also be a blue stuff deposited on