ben lipkowitz wrote: > you'd have to do setp parport.0.pin-03-out-invert TRUE > which changes the way the pin functions. but, there's not really any point > to worrying about the polarity of the step pin anyway, since it will go > through a full pulse every two BASE_PERIODs. >
I beg to differ. Some drives like a step pin that is normally high and goes briefly low, and some like it to be normally low and go briefly high. Sure, you can usually get away with using it the other way around, but you are more likely to have setup and/or hold time issues if your drive is stepping on the opposite edge that stepgen thinks it is. There are also minor issues with things like optocouplers. It is slightly better to have the LED normally off and pulse it on, rather than normally on and pulsing it off. Regards, John Kasunich ------------------------------------------------------------------------- This SF.net email is sponsored by: Splunk Inc. Still grepping through log files to find problems? Stop. Now Search log events and configuration files using AJAX and a browser. Download your FREE copy of Splunk now >> http://get.splunk.com/ _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
