Todd I have a 11kw yaskawa 616 g5 drive and a 9kw hsd biesse high speed spindle.
Do you want me to chase down the parameters? Also what deceleration settings do you have? And what size heat sink. Maybe you are slowing it down faster that before On Thu, 9 Sep 2021, 10:33 Todd Zuercher, <to...@pgrahamdunn.com> wrote: > I was working at upgrading the spindle on a machine. The old spindle was > 9kw the new one is 11kw. This is a Yaskawa 626MC5 drive and a 24000rpm > 11kw router spindle. At first I tired test running it without adjusting > any of the VFD settings. The first test, running a spindle run in program, > failed on the first rpm step after a couple minutes, with a VFD over > current alarm. I then dug into the VFD settings, and made some adjustments > (mostly adjusting the max current settings.) same result. Then changed the > base voltage setting, first try I went the wrong way, and that made the > current draw worse, so I shut it down right away before any alarms. I then > moved the base voltage down, and that lowed the low speed current draw to > within the specs for the VFD. Next thing I notice I smell something hot, I > quick open up the cabinet and the braking resistor is melting down. The > drive is rated for 22.5A and according to its screen it was only outputting > about 17-18A and wasn't even braking at the time. > > Where did I go wrong? I've ran undersized VFDs numerous times without > issue, I thought it just limited your max power. Did I mess something up > in the drive earlier when I set the base voltage wrong and the drive was > trying to output 30+A? > > We have a new braking resistor ordered, but what about the drive? I'm > afraid to just hook it up and try it, for fear it will do it again. Can I > test it without the braking resitor? > > Todd Zuercher > P. Graham Dunn Inc.<http://www.pgrahamdunn.com/index.php> > 630 Henry Street > Dalton, Ohio 44618 > Phone: (330)828-2105ext. 2031 > > > _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users > _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
