Richard Arthur wrote: > I am trying to determine pinouts on my Litton encoders. They have 5 > wires, two for 5V supply, two giving 1000 counts per rev, one giving 1 > count per rev. Can I assume then that the 1000 counts per rev are > Channels A and B and the other is the index? Yes. Is there a rudimentary > method to distinguish Channels A and B? Presumably they need to be > connected the right way round to indicate correct direction of rotation? Well, they really are interchangeable. If the screen display indicates the wrong polarity for the movement, then you can either swap the wires, or change the sign of the INPUT_POLARITY and possibly OUTPUT_POLARITY values in the .ini file. > > In the hardware drivers, for the m5i20 P2 connector, does enc-00 equate > to X-axis, enc-01 equate to Y-axis and enc-02 equate to Z-axis? > > With 1000 count encoders and ball screw pitch 0.2 inch giving a > resolution of 0.0002 inch, I note the old original control display > actually indicated a resolution of 0.0001 inch. Presumably, it really is > limited to 0.0002 inch? If you encoders are 1000 CYCLE/rev, then they actually give 4000 quadrature counts per rev. 4000 x 5 TPI = 20000 counts/inch or .00005" per encoder count.
Jon ------------------------------------------------------------------------- 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 Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
