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
