Re: gEDA-user: Surface mount footprint pin pitch changes at different magnifications in PCB

2009-06-05 Thread John Luciani
On Fri, Jun 5, 2009 at 5:28 PM, Rob Butts <[1]r.but...@gmail.com> wrote: How do you print the postscript file? I doubt I can do it on windows. I guess I'm going to have to bite the bullet and get my printer working in fedora (uhgg). On Fedora I use kghostview to v

Re: gEDA-user: Surface mount footprint pin pitch changes at different magnifications in PCB

2009-06-05 Thread Cyril Hrubis
Hi! >   How do you print the postscript file?  I doubt I can do it on >   windows. Yes you can: http://pages.cs.wisc.edu/~ghost/gsview/get49.htm -- metan ___ geda-user mailing list geda-user@moria.seul.org http://www.seul.org/cgi-bin/mailman/listinfo

Re: gEDA-user: Surface mount footprint pin pitch changes at different magnifications in PCB

2009-06-05 Thread Rob Butts
How do you print the postscript file? I doubt I can do it on windows. I guess I'm going to have to bite the bullet and get my printer working in fedora (uhgg). On Fri, Jun 5, 2009 at 4:33 PM, John Luciani <[1]jluci...@gmail.com> wrote: On Fri, Jun 5, 2009 at 4:27 PM, Rob Bu

Re: gEDA-user: Surface mount footprint pin pitch changes at different magnifications in PCB

2009-06-05 Thread John Luciani
On Fri, Jun 5, 2009 at 4:27 PM, Rob Butts <[1]r.but...@gmail.com> wrote: I'm exporting a postscript file and then converting that to a pdf with the ps2pdf command. I then come up in windows and print the file to my Samsung laser printer. I have to do this be

Re: gEDA-user: Surface mount footprint pin pitch changes at different magnifications in PCB

2009-06-05 Thread DJ Delorie
Draw a board with an exactly 6x6 inch rectangle on it (either a solid rectangle, or fat traces on a 6x6 centers. Print that and measure the actual sizes (edge to edge for rectangle, left side to left side for fat traces, etc) and see if your print process is scaling it at all. If the print is OK

Re: gEDA-user: Surface mount footprint pin pitch changes at different magnifications in PCB

2009-06-05 Thread Rob Butts
I'm exporting a postscript file and then converting that to a pdf with the ps2pdf command. I then come up in windows and print the file to my Samsung laser printer. I have to do this because I have not been able to get my printers to print in fedora. On Fri, Jun 5, 2009 at 1:24

Re: gEDA-user: Surface mount footprint pin pitch changes at different magnifications in PCB

2009-06-05 Thread Steven Michalske
On Jun 4, 2009, at 7:20 PM, John Coppens wrote: > On Thu, 4 Jun 2009 17:15:34 -0400 > Rob Butts wrote: > >> I print out the etch pattern to make a home-made card the pins don't >> line up. > > How are you printing? Using postscript? Or via another program - maybe > GIMP or so? Does that program

Re: gEDA-user: Surface mount footprint pin pitch changes at different magnifications in PCB

2009-06-04 Thread John Coppens
On Thu, 4 Jun 2009 17:15:34 -0400 Rob Butts wrote: > I print out the etch pattern to make a home-made card the pins don't > line up. How are you printing? Using postscript? Or via another program - maybe GIMP or so? Does that program have a fit-to-page function, which might change the scale? Are

Re: gEDA-user: Surface mount footprint pin pitch changes at different magnifications in PCB

2009-06-04 Thread DJ Delorie
> I verified the footprint with the mark function. The ic spec > coincides with what I'm seeing in PCB. Yes, I did etch this myself. You'll have to print a calibration page and calibrate your printer, then, or etch a known-size pattern and calibrate the whole process. In my case, I need to twea

Re: gEDA-user: Surface mount footprint pin pitch changes at different magnifications in PCB

2009-06-04 Thread Rob Butts
I verified the footprint with the mark function. The ic spec coincides with what I'm seeing in PCB. Yes, I did etch this myself. On Thu, Jun 4, 2009 at 6:09 PM, DJ Delorie <[1...@delorie.com> wrote: As a general rule, always check the part against a printout if you're u

Re: gEDA-user: Surface mount footprint pin pitch changes at different magnifications in PCB

2009-06-04 Thread DJ Delorie
As a general rule, always check the part against a printout if you're unsure of the footprint. However, the "right footprint" issue is different than the "looks right" issue. Use the Mark (ctrl-m) to measure the distance between various pins and compare to the chip's specs to see what's up. Did

Re: gEDA-user: Surface mount footprint pin pitch changes at different magnifications in PCB

2009-06-04 Thread Rob Butts
Well, after changing the grid setting to 0.1 the pitch is consistent.. My problem my be with the chip sample I have. When we put the ic on the finished board the pins don't line up. For the most part they do but as you go along from one end of the chip to the other the pins don't

Re: gEDA-user: Surface mount footprint pin pitch changes at different magnifications in PCB

2009-06-04 Thread DJ Delorie
Screen shot? I know that pixel artifacts can cause individual pins to look funny, but that's just visual - not something inherent to the board. ___ geda-user mailing list geda-user@moria.seul.org http://www.seul.org/cgi-bin/mailman/listinfo/geda-user

gEDA-user: Surface mount footprint pin pitch changes at different magnifications in PCB

2009-06-04 Thread Rob Butts
I'm using an h-bridge with a SO28 footprint. The SO28 footprint in PCB has a .050 mil pitch which matches the spec for the chip. When I place the footprint in PCB on a 1" x 1" inch card the pitch is correct. My problem is that the actual card size is 6" x 4". At this size the pi