RE: [Homebrew_PCBs] PCB cutting
2012-12-20 by Rick Sparber
Duane, I have one of these paper cutters but it did not work well for me. The small board squirmed as I started to cut. I can see it working with larger
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RE: [Homebrew_PCBs] PCB cutting
2012-12-20 by Rick Sparber
Mark, I can see how that curving could crack vias and thin traces. Before I made my finger brake ( http://rick.sparber.org/smfb.pdf ), I used aluminum coil .
Re: [Homebrew_PCBs] PCB cutting
2012-12-20 by Duane C. Johnson
I use a paper guillotine. http://en.wikipedia.org/wiki/Paper_cutter The first picture. I think they are about $50us This works much better than tin snips.
Re: [Homebrew_PCBs] PCB cutting
2012-12-20 by Mark Schoonover
I use metal snips for boards no bigger than 2 because anything longer and the board starts to curve up or down depending on which side I need to use. I would
Re: [Homebrew_PCBs] PCB cutting
2012-12-20 by A.Tahir DENGIZ
Proxxon circular saw is not powerfull enough. It has been tried one of my HAM friend. It is only good for balsa wood for models. A.Tahir DENGIZ, TA2T From:
RE: [Homebrew_PCBs] PCB cutting
2012-12-20 by Rick Sparber
I m sure it is a nice machine. But if my sheet metal snips do the trick, why buy something else? Rick ... From: Homebrew_PCBs@yahoogroups.com
RE: [Homebrew_PCBs] PCB cutting
2012-12-20 by Jeff Heiss
How about the Proxxon circular saw for cutting copper clad ($125)? Jeff _____ From: Homebrew_PCBs@yahoogroups.com [mailto:Homebrew_PCBs@yahoogroups.com] On
Re: [Homebrew_PCBs] PCB cutting
2012-12-19 by casy_ch@tbwil.ch
Mark You mean boxes to fit your reserve pcboards ???? hi3x A very good idea this tool. I must have a look if it is available on this side of the pond. Vy 73 de
RE: [Homebrew_PCBs] PCB cutting
2012-12-19 by Rick Sparber
Funny you should mention this. I had a few small circuit boards to cut up just now and tried my sheet metal snips. It is a rather massive hand tool, not the
Re: PCB cutting
2012-12-18 by RDHeiliger
I make my board a bit oversize, don’t have to align toner print as accurately, then trim after etch and drill, have been able to trim off as little as 1/8
Re: [Homebrew_PCBs] PCB cutting
2012-12-18 by Mitch Davis
... On the rare occasion I need to (I m a PCB supplier) I usually use tinsnips. If I had to do it more often I d get my hands on a hand (ie, not air, not
Re: [Homebrew_PCBs] PCB cutting
2012-12-18 by Steve
Richard, Thanks for that recommendation. How does this cutter do if you want small pieces of 1/16in FR4? Seems that I often need a small board perhaps on the
Re: [Homebrew_PCBs] PCB cutting
2012-12-18 by Stefan Trethan
I ve seen a similar cutter for wood laminate flooring but it didn t have the second lever, just a single blade. Also the blade went down into a slot, cutting a
Re: [Homebrew_PCBs] PCB cutting
2012-12-18 by casy_ch@tbwil.ch
What a good idea! Thank you. Here it is available as well. Vy 73 de Jean-Claude, HB3YDH ... [Non-text portions of this message have been removed]
Re: [Homebrew_PCBs] PCB cutting
2012-12-18 by Eldon Brown
RD, Very good, I am going to recommend this to some of my PCB building friends. Here is the HomeDepot URL:
Re: [Homebrew_PCBs] PCB cutting
2012-12-18 by Mark Schoonover
I ve also have been looking for a better way to cut PCB material and I think I ve found it: http://www.youtube.com/watch?v=3RyJHKz8LFU Not only does it say
PCB cutting
2012-12-18 by Richard
a neighbor gave one of these, Roberts Quik-Cut Vinyl Tile Cutter can be found at Home Depot Model # 30002 Internet # 100038849 Store SKU # 729019 $50.00 this
Re: Milling Boards
2012-12-17 by buckeyes1997
oops.. Yes its FR4 from radioshack. I found their board has much smoother surface than the junk I got on ebay. The smallest trace is probably around 8/9 mil.
Re: Milling Boards
2012-12-17 by buckeyes1997
Hello Yes that is the same 90 bit I used. I have tried some 60 degree bits and maybe a 30 degree. I thought the 30 cut too deep to make it useful. The 60
Re: Bernoulli sprayer
2012-12-17 by designer_craig
SS = stainless steel. The Splash tank is about as agressive as a good spray tank and has more action than a bubbler. Wtih a spray thank you could do both
RE: [Homebrew_PCBs] Re: Bernoulli sprayer
2012-12-17 by Jeff Heiss
I m in the USA in Philadelphia. I understand the pros use spray etching. I think I will look at other peoples spray setups and see what they have going on.
Re: Bernoulli sprayer
2012-12-16 by cunningfellow
... Yes SS is stainless. The OP used Amonium Persulfate so SS is OK. If you are etching other metal such as steel or brass then you will be using FeCl3 and
RE: [Homebrew_PCBs] Re: Bernoulli sprayer
2012-12-16 by Andrew Volk
My guess is that SS is Stainless Steel. From: Homebrew_PCBs@yahoogroups.com [mailto:Homebrew_PCBs@yahoogroups.com] On Behalf Of Jeff Heiss Sent: Sunday,
RE: [Homebrew_PCBs] Re: Bernoulli sprayer
2012-12-16 by Jeff Heiss
I like the splash etcher drawing. What does SS stand for in the SS paddle? How would you compare the performance of a splash ether to other etch tanks like
Re: Bernoulli sprayer
2012-12-16 by designer_craig
Jeff, I built the tank back in 1975 and used it off and on for many years. Back in 2000 I was down sizing due to an upcoming move and got rid of it with a lot
Re: Bernoulli sprayer
2012-12-16 by rolynd33
... At the moment I am etching with a bubbler tank and ferric, this works ok for pcb but I have begun fabricating small parts from sheet metal. As I am using
Re: Bernoulli sprayer
2012-12-15 by cunningfellow
... Volume. You don t need a mist. You want fairly large droplets.
RE: [Homebrew_PCBs] Re: Bernoulli sprayer
2012-12-15 by Jeff Heiss
Any pictures of your tank available? Jeff _____ From: Homebrew_PCBs@yahoogroups.com [mailto:Homebrew_PCBs@yahoogroups.com] On Behalf Of designer_craig Sent:
Re: Bernoulli sprayer
2012-12-15 by designer_craig
Guys,just make a splash tank, they are mechanically simple and work very well. All you need is a dasher on the end of a stainless steel or plastic rod
Re: Etching PCB's
2012-12-15 by Roger.Blair
I have done some etching of small brass and copper/bronze parts in the past, although not etching of PCB s, however this etchant/etching discussion has me
Re: Bernoulli sprayer
2012-12-15 by AlienRelics
Perhaps he thinks the box is sealed and pumping air in will build up pressure. The original poster already spoke about filtering any atomized etchant out of
Re: Bernoulli sprayer
2012-12-14 by rolynd33
Thats what I thought, no motors no pumps everything nicely contained in the box, just a source of compressed air from the outside going into the box. But I am
Re: [Homebrew_PCBs] Re: Bernoulli sprayer
2012-12-14 by Stefan Trethan
I don t think you understand the bernoulli pump, the fluid is not pressurized, it is pulled along by the airstream. So it can recirculate just fine. However
Re: Bernoulli sprayer
2012-12-14 by psykhon@yahoo.com
Its not viable becasuse etchant does not recirculate, you just pump it out of the vessel and to the board but if you try to put it back in, it will loose
Re: [Homebrew_PCBs] Milling Boards
2012-12-13 by joe M
On Thu, Dec 13, 2012 at 5:43 PM, Art Eckstein
Re: [Homebrew_PCBs] Milling Boards
2012-12-13 by Art Eckstein
Joe, Just a question, why not use Eagle pcbgcode board? A gentleman just posted how he got Eagle 6.3? and pcbgcode.ulp to work on Unbuntu. And it has auto
Re: [Homebrew_PCBs] Milling Boards
2012-12-13 by joe M
On Thu, Dec 13, 2012 at 9:25 AM, Art Eckstein gerber and excellon - pcb2gcode - G-code - EMC2/Axis -
Re: [Homebrew_PCBs] Milling Boards
2012-12-13 by Art Eckstein
Joe, So far, most has been just tying to make things work properly. Calibration needs to be done initially to find out how wide a path your actually cutting.
Re: [Homebrew_PCBs] Milling Boards
2012-12-13 by joe M
On Thu, Dec 13, 2012 at 11:41 AM, Art Eckstein
Re: [Homebrew_PCBs] Milling Boards
2012-12-13 by Art Eckstein
Joe, I forget where I saw it, but one rule of thumb is 1IPM per 1000rpm of the spindle. It seems to be a good starting place and of course might need tweaking
Re: [Homebrew_PCBs] Milling Boards
2012-12-13 by joe M
Hello Art, Is there any algorithm to figure out the feed rate? I am using a mill feed of 6 inches per min at 10,000 rpm and it seems to be working well (in my
Re: [Homebrew_PCBs] Milling Boards
2012-12-13 by Art Eckstein
Joe, I use 30 IPM and 30,000 rpm No bother either as I am glad to give back to the system that has given me so much. Art Country Bubba
Re: [Homebrew_PCBs] Re: Milling Boards
2012-12-13 by joe M
Hello Buckeyes1997, 90 degree cutter cut was very smooth without any burr. But, it did not provide much leeway when the pcb is not very smooth. Even a mil
Re: [Homebrew_PCBs] Milling Boards
2012-12-13 by Jamie Cunningham
Thanks Joe! I believe that s a 30 degree engraving bit (I only have 30 and 60 degree bits atm) Jamie Check out my CNC projects (and more) at
Re: [Homebrew_PCBs] Milling Boards
2012-12-13 by joe M
Hello Art, Another quick question, What feed rate did you use? Thanks and Sorry for the bother, Joe ... [Non-text portions of this message have been removed]
Re: [Homebrew_PCBs] Milling Boards
2012-12-13 by Art Eckstein
Joe, Reading in the pcb-gcode group, I learned that you needed to calibrate your bit to find out exactly what size it was actually cutting based on depth of
Re: Milling Boards
2012-12-13 by buckeyes1997
I have had very good results with 90 degree cutters. PCB cut with 90 degree bit [Non-text
Re: [Homebrew_PCBs] Bernoulli sprayer
2012-12-13 by Duane C. Johnson
... Try this: http://en.wikipedia.org/wiki/Atomizer_nozzle Duane -- Home of the $35 Solar Tracker Receiver http://www.redrok.com/led3xassm.htm [*]
Re: [Homebrew_PCBs] Milling Boards
2012-12-13 by joe M
Hello Jamie, Those are some good looking pens. That seems to be a pretty sharp bit. What bits did you use? Thanks Joe On Thu, Dec 13, 2012 at 9:15 AM, Jamie
Re: [Homebrew_PCBs] Milling Boards
2012-12-13 by joe M
Hello Art, Thanks for your advice. How did you end up using the 30 degree V-bit? Have you tried the other v-bits such as 45, 60 and 90? I am trying to