Muriatic acid and H2O2
2006-06-26 by mark.mickelsen
I m considering using this combination as an echant and I was wondering if anyone could give me some tips as to how to dispose of it safely when I m through
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Re: 6/6 Rules (.006" lines and .006" spacing)
2006-06-25 by Andrew
... Nice etching. I agree collimation is not needed and bubble etching works well. I currently use both an uncollimated light source and a kinsten bubble
Re: homebrew laser plotter
2006-06-25 by Andrew
... Roel - I have done a bit more work on the PLL thing. That one posted so far was just a test of concept / prototype. There are a few things un-needed and
Re: 6/6 Rules (.006" lines and .006" spacing)
2006-06-25 by derekhawkins
... Kinsten ET-10 is what I have and it works well. The one in the shot has seen active duty for around 5 years and worked so well that I bought two more
Re: 6/6 Rules (.006" lines and .006" spacing)
2006-06-25 by derekhawkins
... Diminshed returns in a homebrew scenario. I have tried float etching with Ferric Chloride (FC) and yes it s possible that it more faithfully reproduces
Re: [Homebrew_PCBs] TT Procedure - was: How to calculate effective mil values from printer dpi
2006-06-25 by Herbert E. Plett
... surely it does, just try yourself when, how and how much. Direct ironing (with the edge or tip) is sometimes necessary to insure proper application, mostly
Re: [Homebrew_PCBs] Re: 6/6 Rules (.006" lines and .006" spacing)
2006-06-25 by Russell Shaw
... Look at the blue etcher tank on http://www.kalex.net.au When the bubbles rise between the pcb and the tank side, a vacuum forms, pulling the pcb against
Re: [Homebrew_PCBs] Re: 6/6 Rules (.006" lines and .006" spacing)
2006-06-25 by John Popelish
... If you want the ultimate in etching, you need to collimate that process. Bubble or spray etching is a far less collimated process than exposing a mask to
Re: 6/6 Rules (.006" lines and .006" spacing)
2006-06-25 by fenrir_co
... I ve used vertical bubble etchers, both homemade, and commercial (but cheaper models), and both of them caused terribly uneven etching. I suspect that 1)
Re: [Homebrew_PCBs] TT Procedure - was: How to calculate effective mil values from printer dpi
2006-06-24 by Kamal Shankar
... Hmm... is using a buffer between the iron (set at cotton) and TT paper back that important ? Tilll today, I just apply the iron directly onto the back of
Re: homebrew laser plotter
2006-06-24 by roel_cnc
... Hi all, M i started this toppic - got lots of replys on it with ideas :) i gonna use Cunningfellow s pll thing some stepper for the laser and a dma-16 card
Re: [Homebrew_PCBs] 6/6 Rules (.006" lines and .006" spacing)
2006-06-24 by Russell Shaw
... I ve used a vertical bubble etcher for a few years and have no uneven etching at all. These myths are in the same category such as ferric chloride is
6/6 Rules (.006" lines and .006" spacing)
2006-06-24 by derekhawkins
I m attempting to debunk the following two myths at the same time; 1. A collimated light source is needed for .005 to .01 rules when photoetching. 2. All
Re: [Homebrew_PCBs] How to calculate effective mil values from printer dpi
2006-06-23 by Stefan Trethan
On Fri, 23 Jun 2006 02:56:28 +0200, Kamal Shankar ... I don t soak it long, no. I have never tried so i dunno if a paper will come off overnight. Your method
Re: [Homebrew_PCBs] Procedure - was: How to calculate effective mil values from printer dpi
2006-06-23 by Stefan Trethan
On Fri, 23 Jun 2006 08:20:50 +0200, Herbert E. Plett ... I don t agree, i rub quite a lot with some papers and it isn t a problem. It s
[Homebrew_PCBs] Procedure - was: How to calculate effective mil values from printer dpi
2006-06-23 by Herbert E. Plett
... or use another paper ... throw the hot board into a cold (warm) water bowl ... paper should not be rubbed off, it must peel gently or even float off by
Re: Anyone have extra time to etch?
2006-06-23 by janpaul2481
hello steven, im paul from the philippines...count me in...
Re: [Homebrew_PCBs] Re: How to calculate effective mil values from printer dpi
2006-06-23 by Kamal Shankar
... The term has it s root in the Latin word - mîllçsimus, or 1000 as we all know. I guess, as standard for all milling machines are in inches (anyone
Re: [Homebrew_PCBs] How to calculate effective mil values from printer dpi
2006-06-23 by Kamal Shankar
... Stefan - my limit currently is my procedure for removing the paper from the copper clad after doing the transfer. The method I use serviced me well till
Re: [Homebrew_PCBs] Re: How to calculate effective mil values from printer dpi
2006-06-22 by Stefan Trethan
... On the right you see single lines of the width specified in the middle. On the left you see two lines with the gap specified in the middle. I hope this
Re: How to calculate effective mil values from printer dpi
2006-06-22 by derekhawkins
... What was the intended spacing between the two 6.66 lines in the artwork?
Re: RE : [Homebrew_PCBs] Re: How to calculate effective mil values from print...
2006-06-22 by JanRwl@AOL.COM
In a message dated 6/22/2006 8:26:31 A.M. Central Daylight Time, lcdpublishing@yahoo.com writes: The crazy terminology of each industry, it keeps everyone
Anyone have extra time to etch?
2006-06-22 by Steven
Anyone willing to help me out by etching a few boards for me? It s definitely going to be a labor of love. It s up to you to use which method you like.
Re: [Homebrew_PCBs] How to calculate effective mil values from printer dpi
2006-06-22 by Stefan Trethan
On Thu, 22 Jun 2006 03:45:27 +0200, Kamal Shankar ... What it can print reliably might be quite different from how wide a dot is, theoretically. If you make a
Re: How to calculate effective mil values from printer dpi
2006-06-22 by derekhawkins
... Probably useful if all you re interested in printing is isolated straight lines. Typically, the toner spill on paper for even a 1200 DPI laser extends
Re: How to calculate effective mil values from printer dpi
2006-06-22 by lcdpublishing
Yup, same here too - just didn t want to inject too much slang into the subject ;-) Chris
Re: [Homebrew_PCBs] Re: How to calculate effective mil values from printer dpi
2006-06-22 by Leon Heller
... From: lcdpublishing To: Sent: Thursday, June 22, 2006 2:21 PM Subject: RE : [Homebrew_PCBs] Re:
RE : [Homebrew_PCBs] Re: How to calculate effective mil values from printer dpi
2006-06-22 by lcdpublishing
Mil isn t used by machinists (here in the U.S.). Our basis is the thousandth of an inch .001 and of course the Inch unit. So, our references follow those
RE : [Homebrew_PCBs] Re: How to calculate effective mil values from printer dpi
2006-06-22 by Robert Hedan
... ... Actually, the term mil _does_ make sense. Americans assume it s supposed to make sense in English; mille means thousand in French. But I
Re: How to calculate effective mil values from printer dpi
2006-06-22 by scratch_6057
... My guess, ( the way I calculate it ) would be 1 inch divided by the DPI (Dots Per Inch), then round off i.e. 1 / 600 ...
How to calculate effective mil values from printer dpi
2006-06-22 by Kamal Shankar
Hi What s the method to find out the track width (in mils) that a laser printer can print reliably from it s resolution in dpi ? Stefan told me that a 600dpi
Macro Lenses for PCB photography - was - Re: My best fine-pitch PCB so far
2006-06-21 by derekhawkins
... I take that approach too when necessary but there are at least two downsides with digital that this F22 shot demonstrates (used flash instead of a tripod);
Macro Lenses for PCB photography - was - Re: My best fine-pitch PCB so far
2006-06-21 by derekhawkins
... I take that approach too when necessary but there are at least two downsides with digital that this F22 shot demonstrates (used flash instead of a tripod);
Macro Lenses for PCB photography - was - Re: My best fine-pitch PCB so far
2006-06-21 by Andrew
... Though your butterflies are pretty I don t have that much patience. All my macro photography will be pretty stationry (PCBs, gears, scratches) I used to
Macro Lenses for PCB photography - was - Re: My best fine-pitch PCB so far
2006-06-21 by derekhawkins
... I was in the Nikon camp too once, have some CP5700 shots here; http://www.pbase.com/eldata/cp5700 ... 100mm in 35mm terms. ... Not at all. For a close
Photoplotter revisited - was - Re: My best fine-pitch PCB so far
2006-06-21 by Andrew
... UV tubes are still pretty cheap compared to UV leads if you are going to make an exposure box that is more than about 100 mm x 100mm. ... DC servo motor
Photoplotter revisited - was - Re: My best fine-pitch PCB so far
2006-06-21 by Andrew
... UV tubes are still pretty cheap compared to UV leads if you are going to make an exposure box that is more than about 100 mm x 100mm. ... DC servo motor
Photoplotter revisited - was - Re: My best fine-pitch PCB so far
2006-06-21 by Andrew
... Yep RED7 was the film I was looking at. And the 1000$ AUD is a bit of a steep price of entry. But I Think it might be worth it even if you can t find a
Collimation is over rated - was - Re: My best fine-pitch PCB so far
2006-06-20 by derekhawkins
... Epson R320 and Epson transparencies. I have two HP lasers here and used them until the dimensional inaccuracies started to get in the way of CNC drilling.
Re: [Homebrew_PCBs] Photoplotter revisited - was - Re: My best fine-pitch PCB so far
2006-06-20 by Adam Seychell
... Yes, cheap and easy are the two words I had in mind when pondering on the idea of a homebrewed photoplotter. The dedicated photoplotter film was a bit
Macro Lenses for PCB photography - was - Re: My best fine-pitch PCB so far
2006-06-20 by Andrew
... Derek - Like your closeups of the SMD components. I am looking at getting a macro lens for my Nikon D70 as I miss not having a macro from my old CP5700.
Collimation is over rated - was - Re: My best fine-pitch PCB so far
2006-06-20 by Andrew
... Derek - what are you using as a phototool to get good 6/6 ? I can get 6/6 when I borrow a fancy laser printer to print on vellum. However my personal
Eagle Tips - Reversing a Polygon Ground Pane Pour, and Isolate
2006-06-20 by kilocycles
The way to delete the polygon ground pane pour is to open the board, such that you have the blue line around the edge. Type in the command: polygon; The ;
Re: My best fine-pitch PCB so far
2006-06-20 by derekhawkins
... 6/6 is doable here but I ve never had reason to with anything real. Here is tortuous 6/6 artwork, this photo doesn t do it justice due to moire and other
Re: My best fine-pitch PCB so far
2006-06-20 by scratch_6057
... and ... absolutely ... thousands ... you ... drops. ... First off I apologize if I am taking the above too far out of context. It is not my intention to
Re: [Homebrew_PCBs] Photoplotter revisited - was - Re: My best fine-pitch PCB so far
2006-06-20 by Philip Pemberton
... Sounds like fun. I d like to have a go at building something like that myself. Could be kinda neat to play with photo-etching. Apparently you can use UV
Photoplotter revisited - was - Re: My best fine-pitch PCB so far
2006-06-20 by Andrew
... Yes - Rotating drum. Single Laser. 15 minutes a page kinda thing. Just a rehash of the one John Elson (pico systems) did. I hope to make it cheap and easy
Re: [Homebrew_PCBs] Re: My best fine-pitch PCB so far
2006-06-20 by Adam Seychell
... Are you actually building your own photoplotter ? I m interested how your doing it. Is it a rotating drum with a slow scan single pass laser ? Or is it the
Re: My best fine-pitch PCB so far
2006-06-20 by Andrew
... I agree that 8/8 is quite do-able with a contact frame and UV tubes. However - what I am calling 8/8 and what others call 8/8 may differ. I think that I
Re: My best fine-pitch PCB so far
2006-06-20 by derekhawkins
... 8 mil is a walk in the park with or without collimation provided you re using a contact frame. Less than 5 mil may benefit from it but by that time you ve