Re: [Homebrew_PCBs] Eagle help with making pads thicker
2009-11-19 by leon Heller
... From: billshat44 To: Sent: Thursday, November 19, 2009 12:59 PM Subject: [Homebrew_PCBs] Eagle
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Re: [Homebrew_PCBs] Eagle help with making pads thicker
2009-11-19 by Harvey White
... Carroll ... Eagle is optimized for board production houses, which means plated though holes and the like. You do want bigger pads for home production.
Mod msg Re: [?? Probable Spam] [Homebrew_PCBs] Eagle help with making pads thic
2009-11-19 by AlienRelics
This is getting rather old. Andrew, would you please fix your spam filter, or edit the subject line when it adds the probable spam text to it? I ve asked you
Re: [?? Probable Spam] [Homebrew_PCBs] Eagle help with making pads thicker
2009-11-19 by Stefan Trethan
You can only do it this way in the library editor, not the PCB layout. You might be able to trick it with design rules.... ST On Thu, Nov 19, 2009 at 2:12 PM,
Re: [Homebrew_PCBs] Eagle help with making pads thicker
2009-11-19 by Ehab Anwar
hi to make the pads bigger, edit the foot print in the library to do this flow the steps 1- from the control panel go to (file --- open --- library) 2-
Re: [?? Probable Spam] [Homebrew_PCBs] Eagle help with making pads thicker
2009-11-19 by Andrew Mathison
Dear Billshat44 in Eagle (haven t done it for years!) you select a Change and change pad sizes to what you want.......up to over 0.5 if necessary!! Look in
Eagle help with making pads thicker
2009-11-19 by billshat44
I spent the last hour reviewing old threads about tt and have a question about making component pads thicker using Eagle. The process I use is design the
Re: [Homebrew_PCBs] Silkscreen printing
2009-11-19 by William Alford
... i owned a screen print business for almost 25 years and my guess is no, although i didn t look at the link. the mesh count for doing most t-shirts is
Silkscreen printing
2009-11-18 by designer_craig
FYI, Got a flyer from Michaels (craft store) and they had a product called a YUDU for just north of $200 us. http://www.whatdoyudu.com/products/default.aspx
Re: [Homebrew_PCBs] PCB Layers
2009-11-16 by leon Heller
G1HSM ... From: fox342002 To: Sent: Monday, November 16, 2009 10:20 AM Subject: [Homebrew_PCBs] PCB
PCB Layers
2009-11-16 by fox342002
Hi all, Could someone help with a text explaning the name of the layers used by Altiu m software? What layers are needed to create a PCB and the meaning of
Re: Positive Photoresist.
2009-11-16 by Ben L
... Myself I use M G Chemicals 600 Series boards, they come with positive resist on them. I normally buy thru Mouser www.mouser.com. You may can get them
FS Gold Plating Bath for Edge Connectors
2009-11-15 by Alan
Sorry to take you bandwidth. Long standing group memeber just posted a Gold Plating bath on ebay. Number 260507334550 Thank you Alan
Re: Making PCB using these new 405nm LASER Diodes
2009-11-15 by pork_u_pine2000
I might be interested in one of those. Can you contact me with the specifics? Dave Witten ... ...
Positive Photoresist.
2009-11-15 by Terry Mickelson
Where in the world can I buy positive photoresist?
Re: Making PCB using these new 405nm LASER Diodes
2009-11-15 by Daniel
There it s no need to spin the laser diode. On the motor just put 2 mirrors like in periscope and that s all. It just needs a sync mechanism.
Re: [Homebrew_PCBs] Making PCB using these new 405nm LASER Diodes
2009-11-14 by Adam Seychell
... Those links to data sheets are of complete polygon mirror motor assemblies. You supply 24V and then point a laser on them. I don t think I can fabricate
Re: [Homebrew_PCBs] Making PCB using these new 405nm LASER Diodes
2009-11-14 by Simao Cardoso
... It s free (as free beer), or at least i can send you one for free. Is just like those, a little bigger with a 2 levels 6 faces mirror, more precise with 3
Re: Making PCB using these new 405nm LASER Diodes
2009-11-14 by designer_craig
Donald, In the Gerber code D1 is expose on , D2 is expose off and D3 is flash . For the Gcode one could convert these to M codes like spindle on/off.
[?? Probable Spam] [Homebrew_PCBs] Re: Making PCB using these new 405nm LASER Diodes
2009-11-14 by designer_craig
The laser diodes don t start to lase until the current reaches a threshold value. Even at the threshold the power output is significant in relation to eye
Re: [Homebrew_PCBs] Making PCB using these new 405nm LASER Diodes
2009-11-14 by Henry Liu
If you want an /easy/ way to do this, just buy something like a Roland DXY type plotter off ebay. I bought two, a roland DXY880 and another a roland dxy1280 I
New file uploaded to Homebrew_PCBs
2009-11-14 by Homebrew_PCBs@yahoogroups.com
Hello, This email message is a notification to let you know that a file has been uploaded to the Files area of the Homebrew_PCBs group. File :
Re: [Homebrew_PCBs] Making PCB using these new 405nm LASER Diodes
2009-11-14 by Russell Shaw
... You can drive the motor in any laser printer scanner head. It s only a problem getting motors if you want to build your own head and optics. You could pull
Re: [Homebrew_PCBs] Re: Making PCB using these new 405nm LASER Diodes
2009-11-14 by Andrew Mathison
Dear lmri2071 You wrote:- You can control the spot size of the laser beam by moving the Z-axe of your mill. Focusing the beam produce a cone of light which is
Re: [Homebrew_PCBs] Making PCB using these new 405nm LASER Diodes
2009-11-14 by Andrew Mathison
The Polygon mirror, with its motor and the special comb to provide for the signals of the position of the mirror, can be found in early, non LED Laser printers
Re: [?? Probable Spam] [Homebrew_PCBs] Re: Making PCB using these new 405nm LASER Diodes
2009-11-14 by Andrew Mathison
Is it not possible to either reduce/control the power output to a safe level or to substitute a normal laser pointer just for setting up? (I am a total newbie
Re: [Homebrew_PCBs] Making PCB using these new 405nm LASER Diodes
2009-11-14 by Adam Seychell
... Ok, maybe not such a good idea. Are laser scanners assemblies expensive ? Some searching revels:
Re: Making PCB using these new 405nm LASER Diodes
2009-11-14 by designer_craig
I will have to play with that when I get the mill put back together. I am in the process of rebuilding the head I just have a few more things take apart, clean
Re: [Homebrew_PCBs] Re: Making PCB using these new 405nm LASER Diodes
2009-11-14 by Donald H Locker
Hi, Craig. The vector plotting reminds me of pen plotters - pen-down would be laser-on; pen-up would be laser-off. I don t think that s part of the G-code or
Re: [Homebrew_PCBs] Making PCB using these new 405nm LASER Diodes
2009-11-13 by Simao Cardoso
... You could use a circular pcb with 2 big circles made off copper tracks and some electric motor brushes to connect power. The signal must be made with a two
Re: Making PCB using these new 405nm LASER Diodes
2009-11-13 by lmri2071
You can control the spot size of the laser beam by moving the Z-axe of your mill. Focusing the beam produce a cone of light which is truncated when the laser
Re: [Homebrew_PCBs] Re: Making PCB using these new 405nm LASER Diodes
2009-11-13 by Adam Seychell
The main problem I see is exposing the centre area of the spiral. You would need to align the disk axis so aligns within 50um of linear axis of the laser. I m
Re: [Homebrew_PCBs] Making PCB using these new 405nm LASER Diodes
2009-11-13 by Volkan Sahin
Good idea. How to make reliable electrical power and video connection to the laser? ... From: Adam Seychell Subject: Re:
Re: Making PCB using these new 405nm LASER Diodes
2009-11-13 by designer_craig
That s a great idea. For small boards possilby a CD drive hack would do. Would take some code to convert the cartesian data to polar data. One could possible
Re: [Homebrew_PCBs] Re: Making PCB using these new 405nm LASER Diodes
2009-11-13 by Volkan Sahin
Hello Dave, There are some poor man s method for the power measurement check Sam s Laser, so many information exist. I m always using goggles during tests.
Re: [Homebrew_PCBs] Making PCB using these new 405nm LASER Diodes
2009-11-13 by Adam Seychell
... The polygon mirror concept sounds more difficult to implement. How about a large diameter disc with a laser diode mounted on the perimeter. The PCB moves
Re: [Homebrew_PCBs] Re: Making PCB using these new 405nm LASER Diodes
2009-11-13 by Leslie Newell
The tricky bit is keeping the exposure times reasonably equal. The disk would have to speed up as the laser approaches the center line. Nice idea though... Les
Re: Making PCB using these new 405nm LASER Diodes
2009-11-13 by designer_craig
Henry, I will have to look at the bmp to raster path. I haven t played with Mach all that much so I don t know how it imports a raster. Do you run the raster
Re: Making PCB using these new 405nm LASER Diodes
2009-11-13 by javaguy11111
... I wonder if instead of trying to do cartesian scans, put the board on some sort of a spinning disk and run the laser in a radial direction or a polar scan.
Re: Making PCB using these new 405nm LASER Diodes
2009-11-13 by pork_u_pine2000
... ... One difficulty that I have worried about using diode lasers is focusing and power measurement. I don t have any tools that are specifically useful for
Re: [Homebrew_PCBs] Re: Making PCB using these new 405nm LASER Diodes
2009-11-13 by Henry Liu
I think it d be way less work to just export gerber as BMP and raster scan. Mach3 has raster scan capability from a bmp. Easy solution. ... [Non-text portions
Re: [Homebrew_PCBs] Re: Making PCB using these new 405nm LASER Diodes
2009-11-13 by Adam Seychell
... No, but I think if the intensity causes polymerisation under 30 seconds or so then it is linear. (i.e exposure time = 1/intensity). I discovered this when
Re: Making PCB using these new 405nm LASER Diodes
2009-11-13 by designer_craig
I looked into a couple of these but I believe they are for island milling. Converting the xy moves from the gerber to the G-code is the easy part the files
Re: Making PCB using these new 405nm LASER Diodes
2009-11-13 by pork_u_pine2000
... ... I have been experimenting with ammonium di-(or bi- same thing) chromate and gelatin emulsions off and on for about a year and a half. Though I don t
Re: [Homebrew_PCBs] Re: Making PCB using these new 405nm LASER Diodes
2009-11-13 by Henry Liu
For your problem to convert to Gcode from gerber, there are three ways: -pcb-gcode (works ok but in Eagle) -export to DXF then into Cam package like LazyCAM
Re: Making PCB using these new 405nm LASER Diodes
2009-11-13 by designer_craig
I had the same idea last spring and purchased a 405nm laser diode with holder/lense and some Riston film off ebay. I added a heat sink to the holder and have
Re: [Homebrew_PCBs] Making PCB using these new 405nm LASER Diodes
2009-11-13 by Volkan Sahin
There is nothing wrong with dryfilm. Only side effect can be its thickness. It is thicker than liquid photoresist. I ve used dichromated PVA in order to avoid
Re: [Homebrew_PCBs] Making PCB using these new 405nm LASER Diodes
2009-11-13 by Donald H Locker
Thank you for the link, Volkan. In my occasional searches over the last few years (mostly for terms like homemade photoresist ) I hadn t found that.
Re: [Homebrew_PCBs] Making PCB using these new 405nm LASER Diodes
2009-11-13 by Adam Seychell
... What s wrong with using dry film photoresist ? Its relatively cheap (under 10% cost of FR4 PCB material per unit area) easy to apply, fairly sensitive to
Re: [Homebrew_PCBs] Making PCB using these new 405nm LASER Diodes
2009-11-13 by Volkan Sahin
Hello Donald, There is no magic for the formula check http://www.holowiki.com/index.php/Dichromated_Gelatin_Chemistry they have detailed information on it. I m