X-Authentication-Warning: delorie.com: mail set sender to geda-help-bounces using -f X-Recipient: geda-help AT delorie DOT com X-ASG-Debug-ID: 1452923303-0978df2d7129c39a0001-ensGXf X-Barracuda-Envelope-From: gheskett AT shentel DOT net X-Barracuda-RBL-Trusted-Forwarder: 204.111.2.25 From: "Gene Heskett (gheskett AT shentel DOT net) [via geda-help AT delorie DOT com]" X-Barracuda-Effective-Source-IP: n64s149.fttx.shentel.net[204.111.64.149] X-Barracuda-Apparent-Source-IP: 204.111.64.149 X-Barracuda-RBL-IP: 204.111.64.149 To: geda-help AT delorie DOT com Subject: Re: [geda-help] adding missing footprints Date: Sat, 16 Jan 2016 00:48:13 -0500 X-ASG-Orig-Subj: Re: [geda-help] adding missing footprints User-Agent: KMail/1.9.10 (enterprise35 0.20100827.1168748) References: <201601151906 DOT 12486 DOT gheskett AT shentel DOT net> In-Reply-To: <201601151906.12486.gheskett@shentel.net> X-KMail-QuotePrefix: > MIME-Version: 1.0 Content-Type: Text/Plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit Content-Disposition: inline Message-Id: <201601160048.13233.gheskett@shentel.net> X-Barracuda-Connect: smtp2.edbg.cloud.shentel.net[204.111.2.25] X-Barracuda-Start-Time: 1452923303 X-Barracuda-URL: https://204.111.1.146:443/cgi-mod/mark.cgi X-Barracuda-Scan-Msg-Size: 4908 X-Virus-Scanned: by bsmtpd at cloud.shentel.net X-Barracuda-BRTS-Status: 1 X-Barracuda-BRTS-Evidence: geneslinuxbox.net X-Barracuda-Spam-Score: 0.50 X-Barracuda-Spam-Status: No, SCORE=0.50 using per-user scores of TAG_LEVEL=1000.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=6.0 tests=WEIRD_PORT X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.3.26182 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- 0.50 WEIRD_PORT URI: Uses non-standard port number for HTTP Reply-To: geda-help AT delorie DOT com On Friday 15 January 2016 19:06:12 Gene Heskett (gheskett AT shentel DOT net) [via geda-help AT delorie DOT com] wrote: > On Friday 15 January 2016 07:58:57 gedah AT igor2 DOT repo DOT hu wrote: > > On Fri, 15 Jan 2016, Gene Heskett (gheskett AT shentel DOT net) [via > > geda-help AT delorie DOT com] wrote: > > > Greetings, new subscriber; > > > > > > Using gEDA as in the debian wheezy repo's, although I was able to > > > get a newer pcb to build, so it is 1.99z. > > > > > > I have composed a little 6 part schematic in gschem, but when I do > > > the translation gsch2pcb step, 4 of the 6 parts I chose schematic > > > symbols for, have no "footprint" and are omitted from the pcb. > > > Loaded into pcb, it obviously makes no sense to this beginner. > > > > > > Can this data be added to the library part description? > > > > > > If so how? And if I do it, how can I submit back to gEDA? > > > > For the PCB workflow, you need to specify the "footprint" attribute > > in gschem. It is not possible to ship a generic purpose lib with > > footprints already set because most devices are available in > > different footprints (e.g. lm358 in SO8 or DIP8, 2n3904 in to92 or > > sot23 or even dual NPN in sot23 with 6 pins). > > > > HTH, > > > > Igor2 > > Can this be done with a text editor, or must it refer to a known > pattern from a library entry somehow? > > IOW, where does this "footprint" data come from? > > As a for instance the transistor is a 2SK3264 mosfet. > > The diodes are 1N5822's, and because they are bulky bodied, will > likely be mounted standing up, and that may still require pads on >100 > mill centers. That same pattern will serve for mounting everything > but the transistor, which of course has 3 legs. > > FWIW, I drew up a perfectly servicable pcb pattern in pcb 2 days back, > but when I exported it as gcode, what should have been about 100k of > gcode, was 1500 bytes and didn't backplot anything but a small blob, > so obviously it ignored what I drew and placed on the bottom of the > pcb. > > I figured on reversing the drill file and using it to make clearance > for short prevention on the top side as I only have double-sided > board. I have also made double-sided boards before with eagle, but I > can't get the latest 7.5 to even unpack. > > If I could draw it in pcb, and export working gcode, that would be > ideal. And I have essentially done that although the used real estate on the board could be shrunk some. But for the I/O connection to the outside world, a via is about 10% of the solder area that I need, so I need to delete those 3, and convert them to something that gives a nominally 1/8" diameter solder pad on the end of the trace. Suggestions? I wound up using the R025 footprint for the 5 passive two terminal parts. But running the code in LCNC, I see it only makes a single isolation pass, and the etching tool I would normally use is a carbide 60 degree V bit with an effective radius of about 2 thou when I drive it 3 thou deep, which is deep enough to wear it out eventually digging that deep into the fiberglass board substrate. FWIW, pcb-gcode, used with eagle, expects that sort of a cutting tool and does multiple passes, stepping over about a thou and a half per pass to get 15 thou of isolation, which makes it quite slow production wise. So would I be better off using a .039" endmill for the isolation cut, which also makes a good drill for most lead holes? Or is that so big it will chew up the adjacent solder pad under the TO220 transistor? I also have some .03125" carbide end mills, but there's very fragile, and damned fragile as I found when making the ebony screw covering buttons for some Green & Green style blanket chests I have under construction. I had to use feedrates in the 2 ipm range, cut depths of 5 to 8 thou, and a vacuum to keep the cut clean to avoid a flute packing full of dust & breaking a $13 tool. One size of those I had to make 136 copies of. Fun or boring, depending on ones viewpoint. One of these will be controlling that vacuum when these are done. Yup, I occasionally call myself a JOAT. And I just noted something else. It appears to assume I am using single sided pcb, and I have none, its all 2oz and double sided. I can drive the mill from the keyboard after turning the board over, in order to prevent lead shorts to the top side copper, but it would be nice to have a top drill. If I can get the witness marks to work, I can cp and mirror the bot.drill, so thats not a huge problem, just a surprise. Was there some option I should have enabled? Thanks guys. Cheers, Gene Heskett -- "There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order." -Ed Howdershelt (Author) Genes Web page