Re: [Homebrew_PCBs] Re: Spray etcher
2004-06-17 by Adam Seychell
... You wouldn t get a even etch with stationary nozzles. The nozzles are mounted on a piece of pipe and the pipe can be rotated about the axis or it can more
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Re: [Homebrew_PCBs] Re: Spray etcher
2004-06-17 by Stefan Trethan
On Thu, 17 Jun 2004 12:02:13 +1000, Adam Seychell ... what i would fear with a pump setup is the fixed position of the nozzles - how do you get a even etch? st
Re: [Homebrew_PCBs] Re: Soldering DIP sockets on the top of the board
2004-06-17 by Stefan Trethan
... i see now what it is all about. There is a similar concept nowadays - socket strips on plastic carrier. they are precision sockets on a plastic strip with
SCOTCH 8007
2004-06-17 by don2822003
Hi all, I am new to this group and come recomended by the AMATEUR REPAIRS group. I am in Australia and have a question. Can anyone help me with the
Re: [Homebrew_PCBs] Re: Spray etcher
2004-06-17 by Adam Seychell
I agree with Ballendo, In regards to amount of hours spent building any spray etching machine, you will save far more time (and possibly money)trying to by off
Re: [Homebrew_PCBs] Re: Soldering DIP sockets on the top of the board
2004-06-17 by JanRwl@AOL.COM
In a message dated 6/16/2004 3:50:21 PM Central Standard Time, stefan_trethan@gmx.at writes: thank god i have no idea whatsoever what you are talking about
Re: Spray etcher
2004-06-17 by ballendo
Hello, I now you said you didn t want the pump. But I wonder why? A RULE brand pump for bilge duty in boats is less than 12 bucks, designed for occasional
Re: Turcite nuts, was: bit cleaning while drilling PCBsf
2004-06-17 by ballendo
System stiffness, or lack thereof, due to long moments and singular pivots involved... Ballendo
Re: [Homebrew_PCBs] Spray etcher
2004-06-16 by JanRwl@AOL.COM
In a message dated 6/16/2004 3:33:32 PM Central Standard Time, atlantis7@gmx.ch writes: ...so that no pump is needed. Can anyone tell me how exactly these
Re: [Homebrew_PCBs] Re: Soldering DIP sockets on the top of the board
2004-06-16 by Stefan Trethan
... thank god i have no idea whatsoever what you are talking about with those socket strips - i assume that must mean i m still rather young ;-)) good luck st
Re: [Homebrew_PCBs] Spray etcher
2004-06-16 by Stefan Trethan
... the centrifugal force spews out the fluid through the nozzles, this creates a void inside the tube. you need to spin it rather fast i d say, maybe 5000rpm
Re: [Homebrew_PCBs] Re: Soldering DIP sockets on the top of the board
2004-06-16 by JanRwl@AOL.COM
In a message dated 6/16/2004 5:58:28 AM Central Standard Time, ballendo@yahoo.com writes: Nope, Similar, but not flea clips. Flea clips were also formed and
Re: Turcite nuts, was: bit cleaning while drilling PCBsf
2004-06-16 by James Newtons Massmind
Sure, but all you have to do is limit your working area to avoid the center pivot. Step size is smaller near the pivot and larger away from it, but with a nice
Spray etcher
2004-06-16 by cruizzer77
Hi, I m thinking about building a spray etcher. This has been discussed here before, but I haven t found an answer to my questions. I want to build the
Re: Turcite nuts, was: bit cleaning while drilling PCBsf
2004-06-16 by ballendo
James, Didn t see the link yet, but usually you trade one source of error for another. The probnlem with rotary-used-linear machines is that as the distance
Re: Soldering DIP sockets on the top of the board
2004-06-16 by ballendo
Jan, Nope, Similar, but not flea clips. Flea clips were also formed and sold in strips, but were U -shaped--think miniature garden trowel-- with two
Re: [Homebrew_PCBs] Re: How does everyone hold down SMT parts
2004-06-16 by Stefan Trethan
On Wed, 16 Jun 2004 06:51:36 -0000, luismoreira_2004 ... 350 to 400 degree, 20-30cm over the board, vertical, on low volume setting to
Re: How does everyone hold down SMT parts
2004-06-16 by luismoreira_2004
Hi Stefan How do you solder using a heat Gun ? what type do you use and what temperature ? I never used this method but if I could do it with the heat gun
Re: [Homebrew_PCBs] How does everyone hold down SMT parts
2004-06-16 by Stefan Trethan
... the glue is only needed for industrial appliation when one side is soldered upside down. you can use the described solder tacking. a member here (sorry,
Re: [Homebrew_PCBs] How does everyone hold down SMT parts
2004-06-16 by Leon Heller
... From: Dave Hylands To: Sent: Wednesday, June 16, 2004 5:33 AM Subject: RE: [Homebrew_PCBs] How
RE: [Homebrew_PCBs] How does everyone hold down SMT parts
2004-06-16 by Dave Hylands
Hi Martin, This is what I do. I ve never had any formal training, so my technique might not be the best, in which case, I m sure that one of the more
How does everyone hold down SMT parts
2004-06-16 by mava3941
How does everyone hold down the SMT parts prior to hand soldering? What type of adhesive is used to hold the SMT parts? Where can I get(I am in the USA) it?
Re: [Homebrew_PCBs] Re: Soldering DIP sockets on the top of the board
2004-06-15 by Stefan Trethan
... Have seen that in some led voltmeters to change range. thought must remember back then. My fluke meters also use a socket with several resistors beside
Re: Soldering DIP sockets on the top of the board
2004-06-15 by Dave Mucha
... pull ... then ... did ... place. ... do? ... on top ... pride ... off ... toothbrush ... I think the pins that are soldered in actually look better than
Re: [Homebrew_PCBs] Re: Turcite nuts, was: bit cleaning while drilling PCBsf
2004-06-15 by JanRwl@AOL.COM
In a message dated 6/14/2004 7:14:14 PM Central Standard Time, dhylands@broadcom.com writes: I couldn t help but notice the Commodore Pet sitting next to it.
RE: [Homebrew_PCBs] Re: Turcite nuts, was: bit cleaning while drilling PCBsf
2004-06-15 by Dave Hylands
Hi Jan, ...
Re: Turcite nuts, was: bit cleaning while drilling PCBsf
2004-06-14 by James Newtons Massmind
Jan, that is a nice looking unit! http://photos.groups.yahoo.com/group/homebrew_pcbs/vwp?.dir=/JanRowland I couldn t find any other information in the Files /
Re: [Homebrew_PCBs] Re: Soldering DIP sockets on the top of the board
2004-06-14 by Jeremy Taylor
Yup - Page 830 - particularly 575-310320 is percisly what I use. $11 for 100 They are not the true socket pins, but the indent in the top allows one to solder
Re: [Homebrew_PCBs] Re: Soldering DIP sockets on the top of the board
2004-06-14 by Stefan Trethan
On Mon, 14 Jun 2004 17:22:00 -0400, Jeremy Taylor ... you can get pins for that purpose, they are like square header pins but smaller and the size of IC pins.
Re: [Homebrew_PCBs] Re: Soldering DIP sockets on the top of the board
2004-06-14 by Jeremy Taylor
I use something similar made by Mill-Max . They are simply called IC pins and printed circuit pins. I use them to make mini dips from SMD components for use on
Re: bit cleaning while drilling PCBs - drilling plexi
2004-06-14 by bsjoelund
Hi, Keep in mind when drilling PLEXI, that you build up thermal stress into the material and can easily break thereof. If critical parts are machined thermal
Re: [Homebrew_PCBs] Re: Soldering DIP sockets on the top of the board
2004-06-14 by Stefan Trethan
On Mon, 14 Jun 2004 20:23:58 -0000, Dave Mucha ... why then not just leave the plastic carrier in place like so many do? With enough
Re: Soldering DIP sockets on the top of the board
2004-06-14 by Dave Mucha
I still can t find the link, but one of the ways I do it is to pull the pins out of a chp socket or an inline header. they come out pretty easy. then put them
Re: [Homebrew_PCBs] Re: Soldering DIP sockets on the top of the board
2004-06-14 by JanRwl@AOL.COM
In a message dated 6/14/2004 11:45:01 AM Central Standard Time, leon_heller@hotmail.com writes: I used to use those. They are made by Molex and should still be
Re: [Homebrew_PCBs] Re: Soldering DIP sockets on the top of the board
2004-06-14 by Leon Heller
... From: ballendo To: Sent: Monday, June 14, 2004 4:32 PM Subject: [Homebrew_PCBs] Re: Soldering DIP
Re: [Homebrew_PCBs] Re: bit cleaning while drilling PCBs - drilling plexi
2004-06-14 by Stefan Trethan
... should have asked that topic before... would have saved me a few hours of ruined work.. ST
Re: bit cleaning while drilling PCBs - drilling plexi
2004-06-14 by ballendo
Hello, It works going the other way too. Using much STEEPER angles, then the breakthrough is a gradual thinng. Most drill sold fro plastic drilling will look
Re: bit cleaning while drilling PCBs
2004-06-14 by ballendo
Hello, BTW, in PCB s there is an effect call epoxy smear, which DOES cause havoc with platethrough holes. Anything you read in depth about PCB s will mention
Re: Soldering DIP sockets on the top of the board
2004-06-14 by ballendo
Hello, I used to buy sockets on a roll(or in strips) which were attached at .100 to the strip of metal they were formed from (at the top). After soldering, the
Re: [Homebrew_PCBs] Re: bit cleaning while drilling PCBs - drilling plexi
2004-06-14 by Stefan Trethan
... makes sense, then the flutes can t dig in and break everything... I have flat ground drills somewhere for milling slots, next time i will use one of the
Re: bit cleaning while drilling PCBs - drilling plexi
2004-06-14 by Dave Mucha
... exits, ... exit ... Another way to drill plexiglass is to use a second sheet as a backing plate. and take a piece of wood to hold it down on your drill
Re: bit cleaning while drilling PCBs
2004-06-14 by Steve
... Look in Files for a larger version: Note what computer he had controlling
Re: [Homebrew_PCBs] Re: bit cleaning while drilling PCBs - drilling plexi
2004-06-14 by Stefan Trethan
On Mon, 14 Jun 2004 07:13:07 -0000, Dave Mucha ... i see... thanks, that s goin to be helpful. st
Re: bit cleaning while drilling PCBs - drilling plexi
2004-06-14 by Dave Mucha
... well; ... appropriate ... The key to drilling plastics is to drill with a flat bottom drill. the normal taper drill will remove a lot of plastic and as it
Re: bit cleaning while drilling PCBs milling plastic
2004-06-14 by Dave Mucha
... have to ... no ... heat is the killer on plastics. also clearing chips is vital. if a chip gets between the cutter and the stock being cut, it acts like a
Re: [Homebrew_PCBs] bit cleaning while drilling PCBs
2004-06-14 by JanRwl@AOL.COM
In a message dated 6/13/2004 7:52:33 PM Central Standard Time, dg140@freenet.carleton.ca writes: How did you account for backlash in your homebrew CNC rig?
Re: [Homebrew_PCBs] bit cleaning while drilling PCBs
2004-06-14 by dg140@freenet.carleton.ca
For larger holes in plexi, drilling a pilot or starter hole works well; speeds at about 500-600 RPM,; and the plexiglass bit with its appropriate flutes and
Re: [Homebrew_PCBs] bit cleaning while drilling PCBs
2004-06-14 by Stefan Trethan
On Sun, 13 Jun 2004 19:47:09 -0400 (EDT), ... my main problem with plexi is: melting - binding - shattering when drilling larger
Re: [Homebrew_PCBs] bit cleaning while drilling PCBs
2004-06-13 by dg140@freenet.carleton.ca
Hi Jan. How did you account for backlash in your homebrew CNC rig? What about those PCB drilling machines, what do they do for backlash and other error
Re: [Homebrew_PCBs] bit cleaning while drilling PCBs
2004-06-13 by dg140@freenet.carleton.ca
How does ABS and PP handle the heat generated by drilling? I have to also mill some ABS. --