On Sunday, January 08, 2012 03:10:16 PM Kirk Wallace did opine: > On Sun, 2012-01-08 at 15:53 +0000, andy pugh wrote: > > On 8 January 2012 14:59, Joachim Franek <[email protected]> wrote: > > > A temperature treatment of the lacquer > > > at 190آ°C will result in durable inscriptions or graphics having a > > > blackish- brown color > > > > It is worth remembering, though in my case I was much more concerned > > about reflectivity than colour. A black/brown shiny layer would not > > work. > > It seems to me, a custom method of burning a CD might work. I would > think very fine lines could be made. Another idea might be to have glass > disks aluminum coated as is done for telescope mirrors and either etch > or burn lines in that. I Could use 3" diameter encoder wheels, but U. S. > Digital's largest is 2". If willing to do transmittence mode using slot type opto stuffs, there is code to do that which can be resized for nearly any diameter and resolution needed, size limited only by the available motion of the Y table on your mill. The original wheel file I started with gave 1 degree resolution in a wheel about 6" in diameter IIRC. See that one at: <http://members.shaw.ca/swstuff/spindle-encoder.html>
> Speaking of telescopes, I'd like to see what they are using here: > http://www.tmt.org/observatory/telescope/controls (bottom of page) Cheers, Gene -- "There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order." -Ed Howdershelt (Author) My web page: <http://coyoteden.dyndns-free.com:85/gene> Vegetarians beware! You are what you eat. ------------------------------------------------------------------------------ Ridiculously easy VDI. With Citrix VDI-in-a-Box, you don't need a complex infrastructure or vast IT resources to deliver seamless, secure access to virtual desktops. With this all-in-one solution, easily deploy virtual desktops for less than the cost of PCs and save 60% on VDI infrastructure costs. Try it free! http://p.sf.net/sfu/Citrix-VDIinabox _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
