A quick search on Froogle for "lightscribe drive" and I found a number of drives in the price range of $25 USD. Since the index marks on the Lightscribe disk are in a separate region of the disk I think they are read by a separate sensor. In other words it should not be hard to convert a drive into an encoder if you do not mind sacrificing a drive for that purpose and have the soldering skills.
You might still need to do some signal conditioning, depending on where you tap into the sensors. This is an interesting idea. If I get time I'll play with it some and post my results. Javid ----- Original Message ----- From: "Alex Joni" <[EMAIL PROTECTED]> To: "Enhanced Machine Controller (EMC)" <[email protected]> Sent: Friday, February 16, 2007 3:17 PM Subject: Re: [Emc-users] Home Made Encoder Ideas >> One method might be to use Lighscribe to burn a rotary scale image >> to a >> CDR disk, but cd's are reflective and practical encoders need to be >> transmissive. Maybe an emulsion used for circuit board etching could >> be >> used on a clear CDROM? Two disks would be needed, one for the scale >> and >> another for a mask. > > well, if you're already acustomed to lightscribe disks, look at the > inside of the disk. > You'll see markings that are perfect for an encoder, you just need to > find (mouse?) 2 optos to work with that. > > The markings are pretty visible in this picture I took: > http://dsplabs.cs.utt.ro/~juve/dropbox/lightscribe/IMG_9645.JPG > > Regards, > Alex > > > ------------------------------------------------------------------------- > Take Surveys. Earn Cash. Influence the Future of IT > Join SourceForge.net's Techsay panel and you'll get the chance to share > your > opinions on IT & business topics through brief surveys-and earn cash > http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV > _______________________________________________ > Emc-users mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/emc-users > ------------------------------------------------------------------------- Take Surveys. Earn Cash. Influence the Future of IT Join SourceForge.net's Techsay panel and you'll get the chance to share your opinions on IT & business topics through brief surveys-and earn cash http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
