Bruce Klawiter wrote: > Will these encoders work for my Bridgeport mill conversion, was thinking I > could put these on the ends of my servo motors. > > http://www.cui.com/Product/Components/Encoders/Incremental_Encoders/Modular/AMT_100_Series > These CUI AMT encoders use a high level of interpolation to get the resolution they produce. The interpolation scheme works great for position, but has a lag responding to acceleration. This lag can be up to about 5 ms for the accelerations I was providing with a light brushless motor from Keling. I had trouble tuning the servo response. I eventually mounted an HP optical encoder on the other end of the motor and read both into LinuxCNC through the same encoder interface. I think that is the comparison Chris is referring to on the archives.
I think these encoders will "work", but you may also have difficulty tuning the servos, especially if you are using strong motors and powerful servo amps so as to get high accelerations. Renco, US Digital (they have a higher-priced series that are fairly good) and Avago (formerly HP, available from Digi-Key and Avnet) have relatively affordable encoders that are very good, but at least twice the cost of the CUI units. None of these encoders are interpolated, so they don't suffer from the CUI trouble. Jon ------------------------------------------------------------------------------ Master Visual Studio, SharePoint, SQL, ASP.NET, C# 2012, HTML5, CSS, MVC, Windows 8 Apps, JavaScript and much more. Keep your skills current with LearnDevNow - 3,200 step-by-step video tutorials by Microsoft MVPs and experts. ON SALE this month only -- learn more at: http://p.sf.net/sfu/learnnow-d2d _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
