Thank you John for your quick response. Indeed I'm talking with Donald too and it seems really nice and responsive.
About your spindle whining a little bit. Could this be solved offsetting the 0 speed reference until it really hits 0 volts? I remember I did this with the yaskawa VFD to really "align" the 0 volts reference with 0 hz or motion stopped on the VFD. I think I'm going to order one kit as soon as possible to test it and use it as a spindle for a live tool on the lathe (with a proper planetary reducer). But, from your experience I guess it's a sure bet to give them a try. El lun., 22 jun. 2020 a las 20:59, John Dammeyer (<[email protected]>) escribió: > I think I paid with credit card. My initial contact was through Alibaba. > Later I've had many discussions with Donald Chen. His English is good > enough to get by although he might be using Google Translate. He can ask > the engineers or pass on questions to them. > > I've used the 400W model in step/dir mode. The spindle 1.8kW is currently > used in 0-10V with direction input. One I finish a few things I'll switch > it over to the second port of the MESA 7i92H and change it to step/dir mode > too. I find when the spindle stops with 0-10V mode that it sometimes > whines a bit. If I twist on the spindle I can make it stop. I think it's > just at some indefinite position based on when the voltage input went below > the motion cut-off. > > I had similar noise from the STMBL drive on DC Servos but never with the > STMBL on the AC servo. And I don't recall the 400W AC servo making that > noise. > > Also, I think when the spindle has stopped I may want to add a time delay > and a specific Spindle Motor Enable so that when it's stopped it's also not > being held in position. Not really needed in 0-10V mode. That might even > be a parameter. I should check. > > The motor encoder output can be divided down. The step/dir can also be > scaled from the 2500 lines to whatever you want. I ran as if it were a 250 > line encoder (1000PPR) to match the US Digital (and later CUI) encoder. > The CUI was programmed with the AMT ViewPoint software to also produce 250 > lines on the DC servo. > > John > > > > -----Original Message----- > > From: Leonardo Marsaglia [mailto:[email protected]] > > Sent: June-22-20 3:19 PM > > To: Enhanced Machine Controller (EMC) > > Subject: [Emc-users] OT: Question about Bergerda servo motors and drives > > > > Hello guys, > > > > I'm planning to buy some servo motors for a router I'm slowly building > and > > I remember a few months ago John Dammeyer told me about these Bergerda > > servo motors and how good they are. > > > > I would like to know a little bit more about anyone having experience > with > > these servos. I motsly interested in the E series since they have a 17 > bits > > absolute encoder and I assume they can be scaled to whatever value you > > want. I plan to use them in position mode with pulse + dir steps. > > > > Also, they told me the best way to place the payment is via Western > Union, > > and I wanted to know how the purchase went for John or any other in the > > list. Just to have a little bit more of confidence before trying to place > > an order. > > > > As always thank you for your time and help! > > > > Leonardo > > > > _______________________________________________ > > Emc-users mailing list > > [email protected] > > https://lists.sourceforge.net/lists/listinfo/emc-users > > > > _______________________________________________ > Emc-users mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/emc-users > _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
