Re: [Homebrew_PCBs] DIY CNC pcb drilling
2012-04-03 by Spencer
I was looking at getting this for my PCB drilling. http://www.shapeoko.com/ ________________________________ From: Kerry Wentworth
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Re: [Homebrew_PCBs] DIY CNC pcb drilling
2012-04-03 by Kerry Wentworth
Very nice! Mine is a bit different (cruder). I used an industrial XY stage, 6 x6 with stepper motors, mounted on the end of my Sherline mill. A homebrew Z
RE: [Homebrew_PCBs] DIY CNC pcb drilling
2012-04-03 by Boman33
Nice work DJ! Commercial drillers are using scary federate drilling several holes per second. I have been using one of the little turbines too for PCB
Re: [Homebrew_PCBs] DIY CNC pcb drilling
2012-04-03 by DJ Delorie
... Well, each winding was 2-5 individual wires wound in parallel. The little PCB combines those into single pins with a known footprint so I could design
Re: [Homebrew_PCBs] DIY CNC pcb drilling
2012-04-03 by William Laakkonen
Nice work DJ, I can appreciate winding a toroidial transformer such as that on your photos. I guess you mounted it on a PCB assembly to make rework easier?
DIY CNC pcb drilling
2012-04-03 by DJ Delorie
Been working on this project for a long time, finally got some results... DIY CNC 409 0.0145 holes in 12 minutes www.youtube.com/watch?v=SR1y6Eq19EU The CNC
Re: [Homebrew_PCBs] FR4 cutting?
2012-04-02 by Simao Cardoso
... I personally recommend 3 tools: a carbide scriber like
RE: [Homebrew_PCBs] DLP - getting better!
2012-04-02 by MIKE DURKIN
Outch ... ill keep my kidneys for now!! ... From: Cristian Sent: 2 Apr 2012 18:45:30 GMT To: Homebrew_PCBs@yahoogroups.com Subject: RE: [Homebrew_PCBs] DLP -
RE: [Homebrew_PCBs] DLP - getting better!
2012-04-02 by Cristian
... The laser head is 1000E plus VAT The software has the same price. ... [Non-text portions of this message have been removed]
RE: [Homebrew_PCBs] DLP - getting better!
2012-04-02 by MIKE DURKIN
That s what im wondering-- how much? ... From: Cristian Sent: 2 Apr 2012 14:58:50 GMT To: Homebrew_PCBs@yahoogroups.com Subject: RE: [Homebrew_PCBs] DLP -
Re: FR4 cutting?
2012-04-02 by sheldon_mp_cooper
I did a Google search and found this exchange: Easiest way to cut PCB s? (with no dust issues)
RE: [Homebrew_PCBs] DLP - getting better!
2012-04-02 by Cristian
Visit, please, www.bungard.de where you can find the Bungard Laser Direct: Bungard Laser Direct, UV laser direct imaging system for common photoresists. We
Re: FR4 cutting?
2012-04-01 by engmstevens@rocketmail.com
Thank you everyone for the recommendations. I made a few phone calls to some local guys in the maker scene and theyve all pointed me to something like this
Re: [Homebrew_PCBs] IC with exposed pad
2012-03-31 by Leon Heller
... I put a large via in the centre of the pad. I solder the leads first, and then feed solder into the via using a large tip cartridge in my Metcal handpiece.
IC with exposed pad
2012-03-31 by iz5fcy
Hi, sorry for my bad English and my little OT question ... :-) I looking for your experience and your valuable suggestions for bottom exposed pad soldering of
Re: FR4 cutting?
2012-03-30 by alex4459jopiklal44
... here my experience.. I have used a plummer sisor or whatever it is called in english :) the problem is that it bend the edge and if it is with photoresist
Re: FR4 cutting?
2012-03-30 by sheldon_mp_cooper
I second that. That s exactly what I ve been using. For a guide line for cutting with a straight cut aviation tin snip, I show the board outline in the Eagle
Re: FR4 cutting?
2012-03-30 by leeleduc
There was a thread on this topic. Search the messages for Wiss or aviation shears. I ve used these on 0.031 .
Re: [Homebrew_PCBs] FR4 cutting?
2012-03-30 by Harvey White
... At least, hand power tools are ok. You can get a small tile wet saw, desktop, from places like Harbor Freight. ... Yes, metal brake. I have a 30 inch
Re: FR4 cutting?
2012-03-30 by Wayne Causey
What type of metal shear do you use? [Non-text portions of this message have been removed]
Re: FR4 cutting?
2012-03-30 by leeleduc
You can see an example of a 0.031 board I cut with a paper trimmer in the photos section under the Dissolvo Paper Experiment folder. It came out very clean
Re: FR4 cutting?
2012-03-30 by leeleduc
I use 0.031 instead of 0.062 FR4 for hobby use. It s much easier to work with. I can cut it cleanly with a paper trimmer or with sheet metal shears. I use
Re: [Homebrew_PCBs] FR4 cutting?
2012-03-30 by John Greusel
I clamp it between two small boards and cut with one of those 6 hobby saws. It doesn t take long and makes a nice cut. I do it outdoors- weather permitting.
RE: [Homebrew_PCBs] FR4 cutting?
2012-03-30 by Boman33
I have a 10 guillotine type that I bought about 30 years ago. It was not cheap. Over the years I have been cutting PCBs and sheet metal and I have never
Re: [Homebrew_PCBs] FR4 cutting?
2012-03-30 by Leon Heller
I use CEM-1, which is *much* easier to score and snap than FR4.Leon Leon -- Leon Heller G1HSM
FR4 cutting?
2012-03-30 by engmstevens@rocketmail.com
I ve been reviewing options for PCB cutting and my options are limited by the fact that I live in an apartment with no garage, so power tools are out of the
Re: [Homebrew_PCBs] Interpreting step-wedge results
2012-03-29 by Philip Pemberton
... That s fair enough for a negative resist... the thing is, Fotoboard and Microtrak are positive-resist boards (they re coated with a liquid photoresist in
Re: [Homebrew_PCBs] Re: Interpreting step-wedge results
2012-03-29 by Philip Pemberton
... Wrong. http://pcbwiki.philpem.me.uk/ I started this ages ago, but nobody really contributed to it -- it ended up being more or less a dumping ground for my
Re: [Homebrew_PCBs] Re: Interpreting step-wedge results
2012-03-28 by Bert Van Kets
First link in Google: http://www.printedcircuitsboards.com/wiki/ ... [Non-text portions of this message have been removed]
Re: Interpreting step-wedge results
2012-03-28 by John
PCBWiki ??? Where would I find this PCBWiki ??
Re: [Homebrew_PCBs] Interpreting step-wedge results
2012-03-28 by DJ Delorie
Assuming your film wants a hold at 8 on a 21 (riston films do), you want the results of your test to show that step 8 had film, but step 9 didn t. More
Re: Phaser solid ink printers
2012-03-25 by Jkirk3279
... Yes, I just wanted to fast-forward into doing PCB etching and thought the wax would make a good protectant. Has anybody posted a progress report on wax
Re: [Homebrew_PCBs] Interpreting step-wedge results
2012-03-24 by Philip Pemberton
... And the answer is.... no! I exposed a board at 170 seconds. It had a thin film of photoresist coating the entire board -- almost invisible, except when it
Re: [Homebrew_PCBs] How do you suspend your PC board in the etching tank?
2012-03-24 by Philip Pemberton
... I drill a 1.2mm hole in the corner then run a length of thin insulated wire through it. I bought a hundred-metre reel of the stuff at a hamfest. It s too
Interpreting step-wedge results
2012-03-24 by Philip Pemberton
Hi, Can someone please help me interpret the results I m getting from a step wedge test? I m working with Microtrak pre-coated boards and JetStar Premium
Re: How do you suspend your PC board in the etching tank?
2012-03-24 by Andrew
... I don t know about CUCL or persulphates, but it does work with HCl + H2O2 -- or it at least it worked for me the last board I etched. I DON T
Re: How do you suspend your PC board in the etching tank?
2012-03-24 by sheldon_mp_cooper
Yeah, I tried that method, but I just want to put a board in a tank and walk away to do something else while bubbles do all the work. Plus, all of my
Re: [Homebrew_PCBs] How do you suspend your PC board in the etching tank?
2012-03-24 by Harvey White
... I think that only works with ferric chloride, not the CUCL etchant nor the persulfates. Harvey
Re: [Homebrew_PCBs] Looking fot Tutorials for soldering SMD's
2012-03-24 by Henry Liu
Buy a dental pick. Knock them back down with one hand while heating the board with the hot air. Typically I just throw the 0603 caps/resistors with tweezers
Re: [Homebrew_PCBs] How do you suspend your PC board in the etching tank?
2012-03-24 by Jan Kok
Forget about etching tanks. http://www.pcbfx.com/main_site/pages/tech_support/no_etching_tank.html I tried the sponge method last time. It was easy,
Re: Looking fot Tutorials for soldering SMD's
2012-03-24 by sheldon_mp_cooper
The hot plate/skillet method works great and is the cheapest and easiest if you re just doing single-sided boards. Google search using hot plate skillet smd
Re: [Homebrew_PCBs] Re: How do you suspend your PC board in the etching tank?
2012-03-23 by Malcolm Parker-Lisberg
Use Titanium wire U loops, if you can get it, as Ferric Chloride does not touch it, or perforated plastic sheet bent into a U shape attached to a plastic
Re: [Homebrew_PCBs] Re: Rejuvenating ferric chloride etchants
2012-03-23 by Russell Shaw
... I ve never had that problem. I d think it would only happen if the FeCl3 was undiluted (little if any water), and the HCl was stronger than the watery
Re: How do you suspend your PC board in the etching tank?
2012-03-23 by sheldon_mp_cooper
BTW, I need to ask this because I m going to an aerated etching tank with the board held vertically and board suspension techniques is something that most of
Re: Rejuvenating ferric chloride etchants
2012-03-23 by sheldon_mp_cooper
... Well, I guess you must be speaking from experience and I haven t done this myself, but this gent who has says it will:
Re: [Homebrew_PCBs] Re: Rejuvenating ferric chloride etchants
2012-03-23 by Russell Shaw
... Adding a cup of HCl to a litre of spent or unspent ferric chloride will cause absolutely no outgassing whatsoever.
Re: toner transfer limits
2012-03-23 by x100
Using 15 mill traces, I can get 100% (no breaks, no rework) results on the first try with magazine paper. The 8 mil traces were also completely intact, but I
Re: How do you suspend your PC board in the etching tank?
2012-03-22 by x100
I drill a hole and use a piece of thread to suspend the board. My etching tank is simply a mouthwash bottle with the top cut off. I store the etchant in a
Re: [Homebrew_PCBs] How do you suspend your PC board in the etching tank?
2012-03-22 by Randall Morgan
Hi I too use insulated solid conductor house wiring to hold my boards in the tank. I use two large #0 pieces of wire that go across the top of the tank and #10
Re: [Homebrew_PCBs] Re: Rejuvenating ferric chloride etchants
2012-03-22 by Leon Heller
... Cupric chloride is a good etchant, so you didn t need to remove the copper! You just needed to add some HCl and bubble air through it, or use some H2O2 to