http://tech.groups.yahoo.com/group/Homebrew_PCBs/ Homebrew Printed Circuit Boards Sat, 05 Jul 2008 20:04:33 GMT Bertho Boman http://tech.groups.yahoo.com/group/Homebrew_PCBs/message/21072 http://tech.groups.yahoo.com/group/Homebrew_PCBs/message/21072 Here is an interesting piece of related information: A lot of years ago one major company, that I am not allowed to mention, was eyeletting double sided PCB Sat, 05 Jul 2008 18:53:57 GMT Stefan Trethan http://tech.groups.yahoo.com/group/Homebrew_PCBs/message/21071 http://tech.groups.yahoo.com/group/Homebrew_PCBs/message/21071 I most definitely remember reading somewhere that a completely "dry" iron (free of any solder) is to be used to reflow eyelets, else the solder will close the Sat, 05 Jul 2008 18:36:48 GMT Harvey White http://tech.groups.yahoo.com/group/Homebrew_PCBs/message/21070 http://tech.groups.yahoo.com/group/Homebrew_PCBs/message/21070 ... Solder plated just means that they solder a bit more easily, and go better with tin/lead plated boards. I haven't had a problem with either type. Harvey Sat, 05 Jul 2008 17:07:48 GMT JanRwl@... http://tech.groups.yahoo.com/group/Homebrew_PCBs/message/21069 http://tech.groups.yahoo.com/group/Homebrew_PCBs/message/21069 In a message dated 7/5/2008 11:52:01 A.M. Central Daylight Time, gustavo@... writes: For those of you who have used the International eyelets, which Sat, 05 Jul 2008 16:51:49 GMT Gustavo Tenrreiro http://tech.groups.yahoo.com/group/Homebrew_PCBs/message/21068 http://tech.groups.yahoo.com/group/Homebrew_PCBs/message/21068 Thanks for the replies. For those of you who have used the International eyelets, which type have you used ? ( i.e. flat, funnel or rolled flange ). Also what Sat, 05 Jul 2008 10:02:03 GMT Bertho Boman http://tech.groups.yahoo.com/group/Homebrew_PCBs/message/21067 http://tech.groups.yahoo.com/group/Homebrew_PCBs/message/21067 Try printing a grid, for example 10 x 10mm, across the page and measure it to see what is actually happening. If there is a linear error in one direction you Sat, 05 Jul 2008 06:15:22 GMT Michel Baguet http://tech.groups.yahoo.com/group/Homebrew_PCBs/message/21066 http://tech.groups.yahoo.com/group/Homebrew_PCBs/message/21066 I made prints on 76µ (3mil) polyester drawing paper, I bought them 20 years ago to make PCB, using a pen plotter and UV exposure. This paper is very stable Sat, 05 Jul 2008 05:25:14 GMT torquemada40223 http://tech.groups.yahoo.com/group/Homebrew_PCBs/message/21065 http://tech.groups.yahoo.com/group/Homebrew_PCBs/message/21065 If they're simple eyelets, you might just use a small steel plate and a transfer punch. When I built an amplifier a bit ago, I used a transfer punch to stake Sat, 05 Jul 2008 02:16:57 GMT DJ Delorie http://tech.groups.yahoo.com/group/Homebrew_PCBs/message/21064 http://tech.groups.yahoo.com/group/Homebrew_PCBs/message/21064 ... Hmmm... Hadn't thought of it that way. Of course, since I'm using special paper (Silkjet or Jetstar at the moment), my options are limited. Neither have Fri, 04 Jul 2008 23:51:44 GMT John Coppens http://tech.groups.yahoo.com/group/Homebrew_PCBs/message/21063 http://tech.groups.yahoo.com/group/Homebrew_PCBs/message/21063 On 04 Jul 2008 17:57:16 -0400 ... That's what I meant - if the paper is just slightly thicker, the paper would advance (microscopically) faster. Even when the Fri, 04 Jul 2008 22:48:26 GMT Mike Young http://tech.groups.yahoo.com/group/Homebrew_PCBs/message/21062 http://tech.groups.yahoo.com/group/Homebrew_PCBs/message/21062 I haven't bothered in quite a few years... I ground and filed flat the tip of a spring-loaded centerpunch. The anvil is just whatever was suitable and lying Fri, 04 Jul 2008 21:57:18 GMT DJ Delorie http://tech.groups.yahoo.com/group/Homebrew_PCBs/message/21061 http://tech.groups.yahoo.com/group/Homebrew_PCBs/message/21061 ... I don't think so. The pattern is regular, and depends on where on the image it is, and doesn't correspond to my own accuracy tests I did last week or so. Fri, 04 Jul 2008 21:52:04 GMT Stefan Trethan http://tech.groups.yahoo.com/group/Homebrew_PCBs/message/21060 http://tech.groups.yahoo.com/group/Homebrew_PCBs/message/21060 I haven't followed the discussion, but i assume the printer calibration settings were tweaked already? There is a tool for epson printers to adjust all kinds Fri, 04 Jul 2008 21:29:03 GMT John Coppens http://tech.groups.yahoo.com/group/Homebrew_PCBs/message/21059 http://tech.groups.yahoo.com/group/Homebrew_PCBs/message/21059 On 04 Jul 2008 17:15:12 -0400 ... Couldn't the comb indicate that the paper thickness is incorrect? Maybe slightly thinner/thicker paper would cause the error Fri, 04 Jul 2008 21:27:41 GMT Harvey White http://tech.groups.yahoo.com/group/Homebrew_PCBs/message/21058 http://tech.groups.yahoo.com/group/Homebrew_PCBs/message/21058 ... It's toner transfer onto the board, then a white film available from pulsar (www.pulsar.gs). Avoid having the stuff over traces and it does much better. I