On 23 May 2012 04:47, Jon Elson <el...@pico-systems.com> wrote: > Roland Jollivet wrote: > > > > > > Does this mean you can use lower resolution encoders on the motor, or > > should they be similar? > > If you had 1um resolution on the fixed linear scale, what linear > resolution > > should the rotary encoder yield? > > > > > It would probably be best if the rotary encoders had quite a bit higher > resolution > than the linear. 1 um on the linear is actually quite good, if the > backlash between motor > and linear movement is small, that may be all your need. > > Jon
Thanks. And a curved ball; Does the rotary encoder really have to be in sync with the linear scale? I'm thinking of a small encoder that is geared up, off the motor shaft (tenshioned/no backlash) So now you have the rotary resolution, but the software would need to keep zero-ing this counter, as it will have a poor tracking relation to the linear sclae, but always yield maybe 5x the linear scale in resolution. Regards Roland ------------------------------------------------------------------------------ Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
