On Tue, 2007-10-23 at 12:18 -0500, Jon Elson wrote: > Kirk Wallace wrote: > > On Mon, 2007-10-22 at 23:20 -0500, Jon Elson wrote: > >> > >>Looking at your link, it says they are sinusoidal.
... snip > > applications. Any one have thoughts on this drive? > > > > http://granitedevices.fi/index.php?id=8 > > > > It too is a little shy on current and voltage. > > > > Very interesting! I was going to say it was a great deal, but > I'm not sure what 219 Euros is, anymore. I believe they have an educational/hobbyist discount of 169e or $120 plus 40e or $28 for shipping. > One thing I note, is > it does not use the HAll signals for commutation. The problem > there is it has no idea how to operate the motor until it has > seen the index pulse. I guess maybe it tries random application > of voltage until the motor moves in the desired direction until > it sees the index pulse, then it knows from then on. I might > ask them for additional info on that. > > Jon Have you seen this link? http://granitedevices.fi/assets/files/vsd-a_004.pdf It mentions something about activating a small motion to initialize the drive. -- Kirk Wallace (California, USA http://www.wallacecompany.com/machine_shop/ Hardinge HNC lathe Bridgeport mill conversion pending Zubal lathe conversion pending) ------------------------------------------------------------------------- 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
