If anyone wants to etch a disc I can probably find an 30 mL or so of KPR.
For best resolution make a 4X image and then photoreduce 4X on to film and use that to expose the KPR. It makes beautiful circuit boards that way. Dave On Dec 25, 2007, at 12:42 PM, ben lipkowitz wrote: > I would feel confident printing 256 lines on a 2 inch diameter > encoder, > with my 600 dpi HP laserjet 1018, but I haven't tried it out with a > sensor > yet. At 512 lines, the spacing between lines starts to look uneven. > > A 7 inch disc with 1024 lines looks pretty good. > > Kinko's has 1200 dpi laser printers... > > Here is a sample output for anyone who has trouble running the python > program: (60mm dia 256 lines) > http://fennetic.net/pub/irc/encoder.pdf > > I'd be happy to run any set of parameters, just ask. > > On Tue, 25 Dec 2007, Kirk Wallace wrote: > >> A while back, I tried printing an encoder with my CAD program. I >> didn't >> get very good results. My laser printer's resolution, which is >> great for >> printing documents, was lousy for encoders. What resolution and how >> small a disk is possible with your method? Although, I suppose for a >> spindle, a larger size and lower resolution is more appropriate. I am >> still looking into a magnetic encoder for clean but oily >> environments. >> >> On Tue, 2007-12-25 at 06:19 +0000, ben lipkowitz wrote: >>> On Mon, 24 Dec 2007, Geert De Pecker wrote: >>> >>>> To do threading on the lathe is the end goal. I'm still in the >>>> development phase for the encoder bit. Want to make it myself >>>> (see part of drawing at http://users.skynet.be/gedp/FILES/ >>>> index.html). >>> >>> Geert, >>> There are some .ps files floating around that can be used to >>> print your >>> own optical encoders, and since postscript is a programming >>> language they >>> are relatively easily modified to do weird stuff such as in >>> http://fennetic.net/pub/irc/encoder-panelized.ps >>> >>> however i find postscript can be hard to understand sometimes, so i >>> rewrote it in python: >>> http://fennetic.net/pub/irc/draw_encoder.py >>> >>> hope this proves useful to someone >>> -fenn >> > > ---------------------------------------------------------------------- > --- > This SF.net email is sponsored by: Microsoft > Defy all challenges. Microsoft(R) Visual Studio 2005. > http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/ > _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users ------------------------------------------------------------------------- This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2005. http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/ _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
