On Sun, Nov 15, 2009 at 12:42:39AM +0200, Alex Joni wrote: > For linear encoders there is usually a reference signal every few mm. > It's in the specs how many mm/inches it's apart, but you can probably > measure it. > It serves the same purpose as the reference signal on a rotary encoder (that > one also repeats along the complete travel quite a few times).
Yes - like Jon E covered, it doesn't even matter what their spacing is. You put the home switch right between two of them. When you home, you first find the switch and then the index/reference pulse. This is exactly like the usual setup with a rotary encoder on the motor or screw. They only need to be far enough apart that you can get a switch to reliably trigger between two of them. On some high resolution scales they are extremely close together and you need a really good, carefully positioned home switch. ------------------------------------------------------------------------------ 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 Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
