Stuart Stevenson wrote: > Gentlemen, > I don't want to be pushy. I haven't seen any reference to the > homing problem for a few days. Is it still receiving some attention?
At this point, I'm almost certain it is a PPMC hardware or driver issue. In previous emails I've outlined the test that would prove that one way or the other. Now I'm waiting for you to run that test. In a nutshell: start EMC, start halscope, attach one channel to position feedback from the encoder, attach another to the index-enable pin on that encoder, set the scope to trigger on a falling edge of the index-enable signal, arm it, and home the machine. The scope will trigger when EMC finds the index pulse. If the position feedback doesn't drop to zero at that instant, there is a driver or hardware problem. I really don't want to type up a huge step-by-step dissertation on how to use halscope without some input from you. If you've used an oscilliscope before, halscope won't be too strange, and simple instructions would do. If you haven't, then I would have to write detailed step-by-step, anticipating every mistake you might make. To be honest, that is incredibly hard to do by email. It would take me more time to write the instructions than it would take you to follow them. Do you have an internet connection to the PC that runs your machine? If not, can you get one (even temporarily)? A connection would let you log onto the EMC IRC channel while you are AT the machine, and we could walk you through the process step-by-step. There is just no substitute for being able to pass information back and forth every few seconds, instead of once or twice a day. Of course, to do that, someone needs to be online at the same time as you are. Your emails are sporadic, so I don't know what timezone you are in or when you work on your machine. I usually am online in the evenings (USA eastern time). Oh, I just remembered - you are the one with the paranoid IT guy aren't you? He probably has visions of IRC as something like AOL instant messages, full of teenagers saying things like "l33t h4xxor d00d, I g0t pr0n 4 u". Our channel is not like that! Try showing him the links below - they are logs of a couple of routine days on #emc. Its a mix of shop talk, people helping each other use EMC, discussing features and/or bugs, and yes, some idle chit-chat. But no script kiddies or "h4xxors". Such people would immediately be kicked out of the channel. http://www.linuxcnc.org/irc/irc.freenode.net:6667/emc/2007-03-31.txt http://www.linuxcnc.org/irc/irc.freenode.net:6667/emc/2007-04-12.txt Regards, John Kasunich ------------------------------------------------------------------------- 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 [EMAIL PROTECTED] https://lists.sourceforge.net/lists/listinfo/emc-users
