Re: gEDA-user: DIY brass stencils
DJ Delorie wrote: The issue is that, if you're etching through 5 mil of brass, you should expect 5 mil of undercutting. I don't think there's much of a way around that, so I'm kinda limited to a 5 mil radius by the time I'm through the panel. What about the methods of electro-polishing? I think that may apply in some commercial secret formulas to get a better etch wall... A lot of those kinds of ideas get discussed on the MEMS list, but often with non metal -- more SiO2 etching. In electro-polishing, the etchant has gelling properties adjusted so the effective concentration in a low area or corner is less than on a high spot or straight long edge. At first everything etches at the same rate, but then the etchant trapped in corners and at the bottom of the undercut gets depleted. That kind of formula might give better corners while still giving a slanted edge like the first experiment with the wiping technique. (Just idea generating -- not tried by me yet) Spray etching or good stirring with a slight amount of gel added might be good... John G ___ geda-user mailing list geda-user@moria.seul.org http://www.seul.org/cgi-bin/mailman/listinfo/geda-user
Re: gEDA-user: DIY brass stencils
John Griessen wrote: In electro-polishing, the etchant has gelling properties adjusted so the effective concentration in a low area or corner is less than on a high spot or straight long edge. At first everything etches at the same rate, but then the etchant trapped in corners and at the bottom of the undercut gets depleted. Reverse that last... Gel would make the corners more round, less corner-like. If you had enough that it slowed etching in a .5 mil radius, it might make the wall straighter by slowing the etching under the toner while not slowing it farther down from the toner edge. The toner edge would be a projecting shelf by then... John Griessen ___ geda-user mailing list geda-user@moria.seul.org http://www.seul.org/cgi-bin/mailman/listinfo/geda-user
Re: gEDA-user: DIY brass stencils
What about the methods of electro-polishing? Given that I'm doing this at home, I'm limited in what I can apply to it. Otherwise I'd just buy a 1mil CNC laser and cut them out, or have someone else make them ;-) ___ geda-user mailing list geda-user@moria.seul.org http://www.seul.org/cgi-bin/mailman/listinfo/geda-user
gEDA-user: Polygon clearance around a hole
It doesn't seem to be possible to have polygon clearance around an unplated via (a via with the hole flag). As soon as the hole flag is enabled, any clearance between the edge of the hole and the polygon it is sitting in disappears. As a result, it's not possible to add mounting holes in a polygon without having any screws then connect to the polygon. Why is this? Is it just a current technical limitation or is it a specific feature? cheers, Justyn ___ geda-user mailing list geda-user@moria.seul.org http://www.seul.org/cgi-bin/mailman/listinfo/geda-user
Re: gEDA-user: Polygon clearance around a hole
PCB version: 20060822 So this was a bug that's been fixed in the CVS version? cheers, Justyn On 22/02/07, DJ Delorie [EMAIL PROTECTED] wrote: It doesn't seem to be possible to have polygon clearance around an unplated via (a via with the hole flag). What version of pcb? It seems to work ok in cvs. ___ geda-user mailing list geda-user@moria.seul.org http://www.seul.org/cgi-bin/mailman/listinfo/geda-user ___ geda-user mailing list geda-user@moria.seul.org http://www.seul.org/cgi-bin/mailman/listinfo/geda-user
Re: gEDA-user: Polygon clearance around a hole
PCB version: 20060822 So this was a bug that's been fixed in the CVS version? No, but the polygon code was completely rewritten since then. The new version seems to do the right thing. ___ geda-user mailing list geda-user@moria.seul.org http://www.seul.org/cgi-bin/mailman/listinfo/geda-user
Re: gEDA-user: Polygon clearance around a hole
I have a related question: I can't seem to add polygon clearance to text either. Is this intentional? I want to add some (copper) text to an area covered by a polygon. cheers, Justyn On 22/02/07, Justyn Butler [EMAIL PROTECTED] wrote: Great, thanks. On 22/02/07, DJ Delorie [EMAIL PROTECTED] wrote: PCB version: 20060822 So this was a bug that's been fixed in the CVS version? No, but the polygon code was completely rewritten since then. The new version seems to do the right thing. ___ geda-user mailing list geda-user@moria.seul.org http://www.seul.org/cgi-bin/mailman/listinfo/geda-user ___ geda-user mailing list geda-user@moria.seul.org http://www.seul.org/cgi-bin/mailman/listinfo/geda-user
Re: gEDA-user: Ones Zeros Technologies Pays PCB Design Engineers Royalties Same as Artists and Musicians
On Feb 22, 2007, at 5:38 PM, Bob Paddock wrote: I'm sure this has problems in so many different ways, but thought you'd find it interesting none the less: http://www.pcb007.com/anm/templates/article.aspx? articleid=14561zoneid=79v= OZT has revolutionized the industry by announcing the company's plans to additionally compensate design engineers for production of their PCB designs. No method exists today for PCB designers to track and/or benefit from the current and future production runs of their designs. This new business method should create a paradigm shift in the industry, states Todd Stewart, CEO of OZT. By registering with http://www.microgrouppcb.com/ , a division of OZT, the design engineer receives a unique registration identifier (ID) administered from the client system. This ID is perpetually assigned to the PCB Design Engineer Get the full article here: http://www.pcb007.com/anm/templates/article.aspx? articleid=14561zoneid=79v= Has anyone noticed a revolution in PCB design? I've apparently missed it. :-) Anyone signing up? All well and good, except for the part in most employee/contractor agreements which stipulates, the company paying you the money owns everything. It's all work for hire, unless the agreement specifically says otherwise. -a ___ geda-user mailing list geda-user@moria.seul.org http://www.seul.org/cgi-bin/mailman/listinfo/geda-user
Re: gEDA-user: Ones Zeros Technologies Pays PCB Design Engineers Royalties Same as Artists and Musicians
On Thursday 22 February 2007 19:45, Andy Peters wrote: I'm sure this has problems in so many different ways, but thought you'd find it interesting none the less: It's all work for hire, unless the agreement specifically says otherwise. Yes, that was number one on my problem list. It gets really ugly during buyouts, where the company is sold off to different people. Someone owns the production rights and has physical possession of the Gerber files, but someone else owns the Intellectual Property, the PCB source files. Messy. Only people that make out are the lawyers. ___ geda-user mailing list geda-user@moria.seul.org http://www.seul.org/cgi-bin/mailman/listinfo/geda-user
Re: gEDA-user: Ones Zeros Technologies Pays PCB Design Engineers Royalties Same as Artists and Musicians
All well and good, except for the part in most employee/contractor agreements which stipulates, the company paying you the money owns everything. I stopped reading at the part that said you had to make them your preferred fab vendor on all your boards. Essentially, they're bribing you to get more business. ___ geda-user mailing list geda-user@moria.seul.org http://www.seul.org/cgi-bin/mailman/listinfo/geda-user
Re: gEDA-user: Ones Zeros Technologies Pays PCB Design Engineers Royalties Same as Artists and Musicians
I had to read this twice before I realized it did not say the ID is perpetually attached to the PCB Design Engineer By registering with http://www.microgrouppcb.com/ , a division of OZT, the design engineer receives a unique registration identifier (ID) administered from the client system. This ID is perpetually assigned to the PCB Design Engineer ___ geda-user mailing list geda-user@moria.seul.org http://www.seul.org/cgi-bin/mailman/listinfo/geda-user
RE: gEDA-user: Ones Zeros Technologies Pays PCB Design EngineersRoyalties Same as Artists and Musicians
This ID allows Ones and Zeros Technologies, Inc. and the client to perpetually track the PCB design through recurring production in the future. Upon completion and acceptance of manufacturing, with accepted delivery and receipt of payment, the registered PCB Design Engineer will be entitled to the predetermined compensation. So basically... I am working for a company to design a board. If I go through OZT, then my company pays X amount of dollars to make the board, and OZT slips me a few cents for every board made. Over time the few cents add up to a million dollars. Im sure my company wouldn't have a problem with that. -Original Message- From: [EMAIL PROTECTED] [mailto:geda-user- [EMAIL PROTECTED] On Behalf Of Andy Peters Sent: Thursday, February 22, 2007 4:45 PM To: gEDA user mailing list Subject: Re: gEDA-user: Ones Zeros Technologies Pays PCB Design EngineersRoyalties Same as Artists and Musicians On Feb 22, 2007, at 5:38 PM, Bob Paddock wrote: I'm sure this has problems in so many different ways, but thought you'd find it interesting none the less: http://www.pcb007.com/anm/templates/article.aspx? articleid=14561zoneid=79v= OZT has revolutionized the industry by announcing the company's plans to additionally compensate design engineers for production of their PCB designs. No method exists today for PCB designers to track and/or benefit from the current and future production runs of their designs. This new business method should create a paradigm shift in the industry, states Todd Stewart, CEO of OZT. By registering with http://www.microgrouppcb.com/ , a division of OZT, the design engineer receives a unique registration identifier (ID) administered from the client system. This ID is perpetually assigned to the PCB Design Engineer Get the full article here: http://www.pcb007.com/anm/templates/article.aspx? articleid=14561zoneid=79v= Has anyone noticed a revolution in PCB design? I've apparently missed it. :-) Anyone signing up? All well and good, except for the part in most employee/contractor agreements which stipulates, the company paying you the money owns everything. It's all work for hire, unless the agreement specifically says otherwise. -a ___ geda-user mailing list geda-user@moria.seul.org http://www.seul.org/cgi-bin/mailman/listinfo/geda-user ___ geda-user mailing list geda-user@moria.seul.org http://www.seul.org/cgi-bin/mailman/listinfo/geda-user
gEDA-user: PCB Element for a Molex 71661-2068?
I need a PCB element for a Molex 71661-2068: http://www.molex.com/product/micro/71661r.html It's got 4 rows of staggered .010 pins (17 ea for the 68 pin) plus two mounting index holes. I haven't learned how to make PCB elements yet, so a pointer to a similar element and/or script would be great. -- Ben Jackson AD7GD [EMAIL PROTECTED] http://www.ben.com/ ___ geda-user mailing list geda-user@moria.seul.org http://www.seul.org/cgi-bin/mailman/listinfo/geda-user
Re: gEDA-user: PCB Element for a Molex 71661-2068?
Thank you Ben for yet another ;) shameless opening for self promotion try this document for an understanding of PCB landpatterns and yes there are scripts available http://www.brorson.com/gEDA/land_patterns_20050129.pdf Steve meier Ben Jackson wrote: I need a PCB element for a Molex 71661-2068: http://www.molex.com/product/micro/71661r.html It's got 4 rows of staggered .010 pins (17 ea for the 68 pin) plus two mounting index holes. I haven't learned how to make PCB elements yet, so a pointer to a similar element and/or script would be great. ___ geda-user mailing list geda-user@moria.seul.org http://www.seul.org/cgi-bin/mailman/listinfo/geda-user
