John Kasunich wrote: > > No, we are not talking about two different things. In the first post of > this thread, Ian explained that he wants to use a stepper motor for the > spindle of a lathe. > > EMC is modular, and its step generator can easily be used independently > to "free run" a stepper. No micro controller is needed. One potential problem with this is that many stepper motors suffer from a lot of iron losses. So much that they will overheat severely when run continuously at modest speed. I think Mariss Freimanis of Gecko made some comment that some motor he was testing would overheat at something like 1300 RPM, with no motor current at all. IE, he spun the motor with another motor, with nothing connected to the motor's wires, and it got quite hot after 20 minutes or so.
The OP might want to check this out, just chucking the motor shaft to a drill press or lathe to make sure this will not be a problem before he makes extensive effort putting the motor on the machine. Jon ------------------------------------------------------------------------- This SF.Net email is sponsored by the Moblin Your Move Developer's challenge Build the coolest Linux based applications with Moblin SDK & win great prizes Grand prize is a trip for two to an Open Source event anywhere in the world http://moblin-contest.org/redirect.php?banner_id=100&url=/ _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
