Pat Lyons wrote: > Ok- so I o-scope'd the mystery wire again this time while taking the table > through it's entire length of travel to find that the signal has a few > places where it blips high. My question is, if an index signal on these > encoders is supposed to give a position reference, why would there be more > than one??? > With the index on a rotary encoder, you get an index pulse every 0.2". As long as the home switch can get you close enough so you always sense the final home position on the same one of these pulses, then it is fine. Having several home markers allows the machine builder to decide whether he wants home at the left, middle or right of the axis travel, for instance. As long as the homing sequence is designed so it always picks up the same index pulse, you are OK.
Jon ------------------------------------------------------------------------------ Let Crystal Reports handle the reporting - Free Crystal Reports 2008 30-Day trial. Simplify your report design, integration and deployment - and focus on what you do best, core application coding. Discover what's new with Crystal Reports now. http://p.sf.net/sfu/bobj-july _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
