Re: [Homebrew_PCBs] Re: FR4 cutting?
2012-04-12 by Harvey White
... Nope. It s the flex of the board when sheared. Less when cut, even less if diamond cut or milled. My understanding of a shear vs a shear/brake is that
Messages
Browse messages
Page 118 of 707 · 35337 messages matched
Re: FR4 cutting?
2012-04-12 by waynehcausey
Erik, Shannon; Thanks for comments. I will opt for the shear/brake from Grizzly. Wayne
Re: [Homebrew_PCBs] Spin coating small PCB?
2012-04-12 by KeepIt SimpleStupid
Re: [Homebrew_PCBs] Re: FR4 cutting?
2012-04-12 by Shannon Haworth
I would chime in here and agree that a break is useful if you decide to bend metal as well as cut PCB boards. For PCB cutting, it is irrelevant. Neither a pro
Re: [Homebrew_PCBs] Re: FR4 cutting?
2012-04-12 by Erik Knise
Wayne, I have used a variety of shears. The dedicated ones tend to be larger and have a larger capacity. The combo machines usually have a smaller capacity
Spin coating small PCB?
2012-04-12 by waynehcausey
Any experience with spin coating small PCBs? Equipment, RPM, photoresist, etc. Wayne
Re: FR4 cutting?
2012-04-12 by waynehcausey
Harvey, thanks for the info. I am wandering if the Griggly 8 mini shear/brake would be easier on coated PCB than the shear? Will the shear/brake make straight
Re: [Homebrew_PCBs] Re: FR4 cutting?
2012-04-12 by Harvey White
... No real difference. I have a shear/brake combination, and the brake is not used for FR4. Mostly a matter of cost for you. Mine is a 30 inch, gotten on
Re: FR4 cutting?
2012-04-12 by waynehcausey
Which is better for FR4 cutting: Shear or Shear/Brake?
Re: [Homebrew_PCBs] Re: Cheap copper clad boards
2012-04-12 by Leon Heller
... I use CEM-1/FPC 16, which sounds similar. I like it because it s very easy to cut and drill, as well as being cheaper than FR4. Leon -- Leon Heller G1HSM
Re: [Homebrew_PCBs] Looking for PCB's that can't be used for some reason
2012-04-12 by Benjamin Blumer
Here you go: http://www.sparkfun.com/products/8477 . No guarantees on the size though. Sent from my iPad On 2012-04-12, at 12:51 AM, Stefan Trethan
Re: [Homebrew_PCBs] Looking for PCB's that can't be used for some reason
2012-04-12 by Stefan Trethan
Larry, The companies likely don t want to give them away because they need to keep the artwork on it confidential. Large sizes are less common for homemade
RE: [Homebrew_PCBs] Looking for PCB's that can't be used for some reason
2012-04-12 by Boman33
That is bigger size than I typically have available and mine are only 1/16 . I will keep you in mind if I see some bigger sizes. Bertho From: Larry Taylor
RE: [Homebrew_PCBs] Looking for PCB's that can't be used for some reason
2012-04-12 by Larry Taylor
That s 8 X 8 I cut off the other 8 by accident on the other Email From: Homebrew_PCBs@yahoogroups.com [mailto:Homebrew_PCBs@yahoogroups.com] On Behalf Of
RE: [Homebrew_PCBs] Looking for PCB's that can't be used for some reason
2012-04-12 by Larry Taylor
8 X is about as small as most of us can go with. ( 1/8 or thicker ) Maybe we could glue a few sheets together to make them thicker From:
RE: [Homebrew_PCBs] Looking for PCB's that can't be used for some reason
2012-04-12 by Boman33
With large what do you mean? Thickness? What are the smallest size that you would be interested in? Bertho From: Larry Taylor Sent: Wednesday, April 11, 2012
Looking for PCB's that can't be used for some reason
2012-04-12 by Larry Taylor
I m looking to get some PCB s that are no good because of an error of some kind. I need them for fins on High Power Rockets. There are several people in our
Re: [Homebrew_PCBs] Re: Cheap copper clad boards
2012-04-11 by Riley
FWIW they re FR1, which is a paper/epoxy that doesn t eat bits or produce dust that kills pretty much anything. (exposed skin, lungs, bearings, etc) they do
Re: Cheap copper clad boards
2012-04-11 by John
I am still interested! Those boards are 0.062 thick. Too much for my laminator. It could be that after I learn this toner transfer method I won t need the
Re: [Homebrew_PCBs] Re: DIY CNC pcb drilling
2012-04-11 by DJ Delorie
... In this case, they were free :-) But in general, BLDC motors maintain their rated torque at much higher RPM than steppers, and are typically used with
Re: DIY CNC pcb drilling
2012-04-11 by Andrew
DJ, what advantages do the BDC motors have over steppers? And what mechanism did you use for feedback to determine when to start and stop?
Re: Reproducing existing board layouts
2012-04-11 by AlienRelics
... Of course, with an orphaned product that may not be an issue. The original poster may also try looking for updated schematics. I have a few Heathkit
Re: [Homebrew_PCBs] Re: Cheap copper clad boards
2012-04-11 by Spencer W
If anyone is still interested in the boards that I have, let me know. Can t blame ya though as those inventables boards are cheaper! Sent from my iPhone ...
Re: [Homebrew_PCBs] Reproducing existing board layouts
2012-04-10 by John Greusel
I think one of the best uses of that feature is creating PCB production files from old drawings (public domain things) that you like to have silkscreening and
Re: [Homebrew_PCBs] Reproducing existing board layouts
2012-04-10 by DJ Delorie
gEDA s PCB has an option to import an image as your background, specificially for this purpose. Note: the usual caveats about copyright etc apply, when
Re: [Homebrew_PCBs] Re: FR4 cutting?
2012-04-10 by Stefan Trethan
I use a lever shear just like this. For the best edge I have shimmed the blades closer together with paper strips. Cutting boards longer than the blade
Re: [Homebrew_PCBs] Reproducing existing board layouts
2012-04-10 by Stefan Trethan
Some layout software allows you to import bitmaps. Scan your boards as good as you can, and then draw over the imported bitmap. I ve reproduced a couple of
Re: [Homebrew_PCBs] Re: FR4 cutting?
2012-04-10 by Erik Knise
Item # 90757 - http://www.harborfreight.com/8-inch-bench-top-shear-brake-90757.html It sure has gone up in price in the last few years...Grizzly s is way
Re: Cheap copper clad boards
2012-04-09 by John
I think the 0.032 pcb stock was two in a pack and 9-1/2 x 12 inches.
Re: [Homebrew_PCBs] Re: FR4 cutting?
2012-04-09 by Robert Jones
What is the catalog no or product name of the sheet metal cutter on Harbor Freights website? Thanks ________________________________ From: D
Re: Cheap copper clad boards
2012-04-09 by John
If you feel up to it, I would like 2-orders. 4 X 6 is my favorite size. Actually whatever is shippable! a final target size of 3 x 5 is also a good size
Re: Cheap copper clad boards
2012-04-09 by sheldon_mp_cooper
That 0.025 figure probably meshes with my 0.032 double sided stuff, the lower thickness being due to the missing copper side. I d be interested in getting a
Re: Cheap copper clad boards
2012-04-09 by upnxwood16
The board thickness is 0.025 with my calipers, so it is flexible and I can easily get 18 pieces that are 4x6 out of one sheet. It would be hand cut with my
Reproducing existing board layouts
2012-04-09 by BrianS
Hi, I m only a hobbyist too, but I have a number of old test equipment items that manuals are pure unobtainium for. I d like to do up a decent resource file
Re: Samsung laser printers - any good for PCB's?
2012-04-08 by x100
I use a Samsung 1665 printer. I ve been using magazine paper. I do mostly double sided surface mount with 0603 parts and 15 mil traces. The results are very
Re: [Homebrew_PCBs] Re: Cheap copper clad boards
2012-04-08 by Spencer W
Yah I can definitely do that. I will measure the boards here soon and let you know Sent from my iPhone ... [Non-text portions of this message have been
Re: FR4 cutting?
2012-04-08 by D
Hi, ... I use an 8 sheet metal sheer from Harbor Freight and I m happy with the results. It cost around $125. BR, Dennis
Re: Cheap copper clad boards
2012-04-08 by D
Hi Spencer, ... Checked their website. They don t do retail sales on-line. Are you interested in buying, cutting down to size that can be shipped, and
RE: [Homebrew_PCBs] DIY CNC pcb drilling
2012-04-04 by Rodney Jackson
Thank you Kerry, All points noted, thank you for your reply. I will have to learn the magic of C language and things might seem clearer then. Again, thank
RE: [Homebrew_PCBs] DIY CNC pcb drilling
2012-04-04 by Boman33
Thanks DJ, I missed the emulates and saw pulses and direction. Nice work!! Bertho =============================== From: DJ Delorie Sent: Wednesday, April
Re: [Homebrew_PCBs] DIY CNC pcb drilling
2012-04-04 by DJ Delorie
... I don t own any steppers, I don t know why any of my links would talk about them. The BLDC link talks about the brushless DC motor controller; it
Re: Samsung laser printers - any good for PCB's?
2012-04-04 by sailingto
The problem with the HP 1102 model it does not allow mirror when printing. Toner transfer works ok, but if you re using ExpressPCB you don t have the ability
Re: [Homebrew_PCBs] DIY CNC pcb drilling
2012-04-04 by Kerry Wentworth
Hi Rod, Software and steppers should not hold you back. I used some surplus steppers that I had bought surplus for ~$5 each. And there is software out there
RE: [Homebrew_PCBs] DIY CNC pcb drilling
2012-04-04 by Rodney Jackson
Hello Kerry, I am wondering if you might put your talents in a section for know nothings like myself.? As long as you are not in the business of actually
Re: Samsung laser printers - any good for PCB's?
2012-04-04 by leeleduc
I use a Samsung ML-2525. You can see my results in the photos section under the folder Dissolvo Paper Experiment . The paper was just an experiment, I usually
Re: [Homebrew_PCBs] Samsung laser printers - any good for PCB's?
2012-04-03 by Leon Heller
... An inkjet printer is best if you use photo-etch, I get very good results with an HP 5940 which I bought a few years ago. I think that the current model is
Re: Samsung laser printers - any good for PCB's?
2012-04-03 by AlienRelics
Check the Database of the group, there are a few Samsung Laser printers in there. Looks like decent results.
Samsung laser printers - any good for PCB's?
2012-04-03 by thb201
Hello group: I just joined the group and this is my first post so I hope I m not treading over old territory. I ve made PCB s in the past using the black
Re: [Homebrew_PCBs] DIY CNC pcb drilling
2012-04-03 by William Laakkonen
... You would have less lead inductance and perhaps reduce EMI via unintentional radiators if you did solder direct, but I understand the motivation. When it
Re: [Homebrew_PCBs] DIY CNC pcb drilling
2012-04-03 by Kerry Wentworth
Looks very nice, but large and expensive for my purposes. I was given the XY stage, and the rest was built from parts on hand. The laptop cost me $8. I