2009/6/13 Kirk Wallace <[email protected]>: > What is OHP?
Overhead Projector. They still make the pens, even in these days of Powerpoint and Beamers. Nothing special, just the completely standard Staedtler Lumocolor Permanent. Word on the interweb is that red works best. I was lucky that my plotter came with a collet-type pencil holder, so the OHP pens fit straight in. > If it is convenient, please provide a link to more > information on your PCB process. It's perfectly conventional stuff, really. I used McCad PCB and schematic software to create a HPGL file of the required artwork, plotted that on the plotter, etched with Ferric Chloride (in the kitchen sink). I wrote a very simple bit of Octave to convert the Exellon drill file to G-code, then used my CNC mill to drill the component holes. A more detailed writeup of someone else doing things the same way is here: http://www.willcoxonline.com/PCBplotting/main.html I have skipped over some details, mainly concerned with me using a Mac with a USB-serial converter and having to handle data flow in software. That shouldn't be an issue for anyone with hardware serial or parrallel ports. > >> and also for a rapid >> prototyping system using a vinyl-cutting knife to slice out many >> layers of label paper which can be assembled on a jig to create models >> of components for casting patterns etc. > > Would Reprap be a viable alternative? > http://reprap.org/bin/view/Main/WebHome > >> I use Gnu Octave ( http://www.gnu.org/software/octave/ )to drive the >> plotter. This is free software that copies the functions of the Matlab >> language. Like Matlab it auto-indexes though lists and matrices making >> it very suitable for handling lists of data. It also has built-in >> functions for sorting, indexing, determinants etc, etc, etc, >> As a picture is worth 1000 words, here is a picture of the sort of >> thing the system produces. > > This sounds similar to my trying to use an OpenOffice spread sheet to > edit g-code. You can describe relationships between data, so when a > feature changes the affected data changes with it. Plus it allows me to > organize the data that I know, so that I can play with it until I get > what I need. > > -- > Kirk Wallace > http://www.wallacecompany.com/machine_shop/ > http://www.wallacecompany.com/E45/index.html > California, USA > > > ------------------------------------------------------------------------------ > Crystal Reports - New Free Runtime and 30 Day Trial > Check out the new simplified licensing option that enables unlimited > royalty-free distribution of the report engine for externally facing > server and web deployment. > http://p.sf.net/sfu/businessobjects > _______________________________________________ > Emc-users mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/emc-users > > -- atp ------------------------------------------------------------------------------ Crystal Reports - New Free Runtime and 30 Day Trial Check out the new simplified licensing option that enables unlimited royalty-free distribution of the report engine for externally facing server and web deployment. http://p.sf.net/sfu/businessobjects _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
