Re: [Emc-users] Linear / glass Scales (Disc position)

Maybe these have changed a bunch since I looked at them, but the way they *used to* work was there was a lead screw that did coarse positioning, then a mirror and lens under audio frequency servo feedback loops looking at the reflection pattern to see how close to the center of the pattern it is.

Re: [Emc-users] Linear / glass Scales (Disc position)

On Thu, 18 Feb 2016 20:47:28 -0800 Chris Albertson wrote: > On Thu, Feb 18, 2016 at 11:23 AM, Nicklas Karlsson > wrote: > > > I guess it would be possible to position an ordinary disc read head quite > > accurate. Either one for DVD/CD