Re: [Homebrew_PCBs] Re: Cheap UV laser?
2005-10-10 by Henry Carl Ott
I remember that S.A. article. From back when the amateur scientist did some real science. It was cheap, but complex. Also I believe it was only pulse mode. I
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Re: Cheap UV laser?
2005-10-10 by Dave
... I seem to remember plans where you could build your own ultraviolet Nitrogen based laser (for little cost). I think the plans may have been in Scientific
Eagle PCB SOT223 Routing Question
2005-10-09 by scratch_6057
Can anyone explain how to get the Autorouter in Eagle (Freeware Version) to route two tracks in the PCB layout to one pin in the schematic? Specifically what
GBC Laminator
2005-10-09 by milkgonefunky
Hi guys, I am in AU, and I just bought a GBC Creative Laminator. I am yet to try it out for the purposes of sticking a PCB pattern to a copper board, but I
Cheap UV laser?
2005-10-08 by cristian
Any idea where to find the cheapest UV laser? Cristian
Eagle PCB SOT223 Routing Question
2005-10-07 by scratch_6057
Can anyone explain how to get the Autorouter in Eagle (Freeware Version) to route two tracks in the PCB layout to one pin in the schematic? Specifically what I
Re: My Tool collar setter
2005-10-04 by lcdpublishing
Oh, that is bad. I have only worked with a couple of heidenhein controls and never felt they were too good. But it seems as though you have a system in place
Re: My Tool collar setter
2005-10-03 by Andrew Mawson
... these ... the ... just ... Chris, Yes it s a Bridgeport Interact 1 using a Heidenhain TNC151 controller (1987 vintage), and although tool offsets can
Re: My Tool collar setter
2005-10-03 by lcdpublishing
ANdrew, Sorry if this has already been asked/covered, but are you using these drills on a CNC machine? If so, does that machine have tool length offsets? If
My Tool collar setter
2005-10-03 by Andrew Mawson
OK I bit the bullet and made a tool collar setter last night. It unfortunately relies on the collars being the same thickness so I measure them first. I have
Re: Your Wire EDM
2005-10-03 by ralucas4277
... usec ... 30 ... this ... Curt, I assume it would be neccessary to use a raw rectified feed thru the first scr to the discharge cap, so that the voltage
Re: [Homebrew_PCBs] Re: Setting drill collars to length
2005-10-02 by Stefan Trethan
On Sun, 02 Oct 2005 18:41:06 +0200, Andrew Mawson ... maybe tomorrow. To reference it to the top of the ring you could press the drill
Re: Setting drill collars to length
2005-10-02 by Bob_xyz
... wrote: ... on ... set ... max ... If ... My thought was that, as long as the collars were all the same thickness, there s a fixed distance from the
Re: Setting drill collars to length
2005-10-02 by Andrew Mawson
... I !) ... more ... a ... so ... from ... though.... ... to it, ... one with ... second ... another one. ... (maybe ... similar ... Stephan, Can you pop a
Re: Setting drill collars to length
2005-10-02 by Andrew Mawson
... Alternately, ... height ... The top HAS to be the reference as in fact it rests against a shoulder on the collet to set the position in the spindle.
Re: Setting drill collars to length
2005-10-02 by Bob_xyz
How much do the collars vary in thickness? Might it be workable to add shims to make all of the collars the same thickness? Alternately, could the thicker ones
Re: [Homebrew_PCBs] Setting drill collars to length
2005-10-02 by Stefan Trethan
On Sun, 02 Oct 2005 16:14:15 +0200, Andrew Mawson ... I have a screw device too, i didn t sit down to design much though.... It s just a
Re: [Homebrew_PCBs] Setting drill collars to length
2005-10-02 by Alan King
that the collars vary in thickness and the critical reference is from ... Don t see much need for this manually, so I m guessing you re using a CNC of some
Setting drill collars to length
2005-10-02 by Andrew Mawson
I tend to use resharpend drills (as they are cheaper and so am I !) but use a collar to set the length to a standard so changing mid way through a board is
etching container link
2005-10-02 by pebo festus
found a link that points to a beverage despencer that will make a good etching tank. i found on at a garage sale and traced the manufactuer down.will have to
File - monthly.txt
2005-10-01 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
Re: cheap photo etching strikes back
2005-10-01 by derekhawkins
... vinyl ... Where is the cheap (and assumed readily available) in your photo- etching process besides the use of sunlight? What s the cost and availability
Re: cheap photo etching strikes back
2005-10-01 by hjf2k2
... I don t get it.
Binocular Microscope on Craigslist Seattle
2005-10-01 by Steve
Not mine, thought someone here might be interested. A binocular microscope on Craigslist Seattle for $100. http://seattle.craigslist.org/sys/101108933.html
Re: cheap photo etching strikes back
2005-09-30 by derekhawkins
... Is this the emulsion you have been referring to or an excerpt from your resume? I m confused.
start my account
2005-09-30 by godagamage gampala
start my account ... Yahoo! for Good Click here to donate to the Hurricane Katrina relief effort. [Non-text portions of this message have been removed]
Re: Your Wire EDM
2005-09-29 by Andrew Mawson
... the ... far ... cheaper. ... Stefan, This is a Die Sinker edm m/c - the fluid is constantly pumped through two big cylindrical filters the size of lorry
Re: [Homebrew_PCBs] Re: Your Wire EDM
2005-09-29 by Stefan Trethan
On Thu, 29 Sep 2005 17:37:32 +0200, Andrew Mawson ... Would not water be sufficient for PCBs? A ion exchanger would not be expensive.
Re: [Homebrew_PCBs] Re: Your Wire EDM
2005-09-29 by roger lucas
... Curt, Many thanks for the info. Your schematic will be great, and allow me to finish the PIC controller without having to go over all the ground you have
Re: cheap photo etching strikes back
2005-09-29 by hjf2k2
hey there. I posted pictures on the files area. It s water based emulsion, the MSDS states that it is a vinyl dispersion , a fancy name for white paper glue.
Re: cheap photo etching strikes back
2005-09-29 by hjf2k2
Well I don t know, I m using chemicals for serigraphy for professional use only , more precisely, bichromate-sensitivized vinyl dispersion, used for TEXTILE
Re: Your Wire EDM
2005-09-29 by curt_rxr
- ... Hi Roger, Cristian, Andrew, et al, I used junk box parts that I had around! The SCR was a NTE5369 ( 125A, 1200V )which is a stud mount type and was
Re: Your Wire EDM
2005-09-29 by Andrew Mawson
... Yep - I had to buy two of those drums - nearly £270 including the VAT ! But at least the workshop doesn t stink of paraffin and so far hasn t burnt down
Re: [Homebrew_PCBs] Re: Your Wire EDM
2005-09-29 by roger lucas
Andrew, Yes, I ve just been quoted £2-08/litre by the UK distributor, MIN QTY 55 litres, Gulp, but that is delivered!! I was using a document scanner on my
Re: Your Wire EDM
2005-09-29 by Andrew Mawson
... Roger, If you were to make your scanning system move both the EDM mechanism and an opto head looking at a conventional translucent PCB image, the digital
Re: [Homebrew_PCBs] Re: Your Wire EDM
2005-09-29 by roger lucas
... desire ... I own a CNC milling machine from www.bungard.de and I m interested to replace milling with EDM. Also I ve just bought a high power UV led and
Re: [Homebrew_PCBs] Re: Your Wire EDM
2005-09-29 by roger lucas
... I m a Johnny come lately both on this board and on this thread so I ve probably missed something vital but something puzzles me about this process:
Re: [Homebrew_PCBs] Re: Your Wire EDM
2005-09-29 by cristian
... I own a CNC milling machine from www.bungard.de and I m interested to replace milling with EDM. Also I ve just bought a high power UV led and now I m
Re: Your Wire EDM
2005-09-29 by Andrew Mawson
... Roger, I m a Johnny come lately both on this board and on this thread so I ve probably missed something vital but something puzzles me about this
Re: [Homebrew_PCBs] Re: Your Wire EDM
2005-09-29 by roger lucas
... Cristian I m not sure whether you were referring to Carl s schematics or mine. I had already started a design slightly different to Carl s using a pic as a
Re: [Homebrew_PCBs] Re: Your Wire EDM
2005-09-29 by cristian
... May I have the schematics, please? Cristian
Re: [Homebrew_PCBs] cheap photo etching strikes back
2005-09-28 by Adam Seychell
... Hi, What type of screen emulsion did you use. It sounds like its not water based like the one I tried to use. I recently posted a reply to Bob about my
Re: [Homebrew_PCBs] Re: Your Wire EDM
2005-09-28 by cristian
IPS 5751 is 50V/45A/R=0.019, better than 5451 (45V/35A/R=0.025) and cheaper. Cristian
Re: [Homebrew_PCBs] Pad Cutters Source
2005-09-28 by Leon Heller
... From: Radra To: Sent: Wednesday, September 28, 2005 6:32 PM Subject: [Homebrew_PCBs] Pad Cutters
Re: [Homebrew_PCBs] Pad Cutters Source
2005-09-28 by Stefan Trethan
... dunno where they are sold, you can grind one. Take a broken drill, grind the end flat to maybe 2mm or so, and grind out a center pin and cutting points on
Re: Your Wire EDM
2005-09-28 by idaho_huckleberry
Curtis, I would be very interested in trying this also, do you have a schematic of your circuit available? How fast is brass wire used up as part of the
Pad Cutters Source
2005-09-28 by Radra
Does anyone have any suggestions where I can obtain a set of pad cutters. Would like to be able to cut various size pads on my PCBs. One common use will be to
Re: cheap photo etching strikes back
2005-09-28 by derekhawkins
Clarification.... ... The conventional process uses sodium hydroxide or something similar here. You apparently have to resort to steel wool...Not good. ... The
Re: Your Wire EDM
2005-09-28 by ralucas4277
... wrote: My initial runs ... Curtis, That is very impressive. I am going to breadboard this on a pcb and try it this w/e. BTW, can I ask what spec of SCR you
Re: cheap photo etching strikes back
2005-09-28 by hjf2k2
maybe the aluminum protects itself, like it does on air? I don t know how does it affect copper, but it does. copper gets kind of dull and some colors appear.