On Saturday, April 14, 2012 12:44:59 AM Gabriel Willen did opine: > Finally some educated answers, this mailing list is really coming > through! I have a 660W 48v 15A Bldc motor, using this drive > http://www.sei-automation.com/products/Brushless/BLDC-5015A.html laying > around. I started thinking about trying to set it up as a servo, see > how it would do, Get a 1000cpr encoder with A, A-, B, B-, Z, also With > 8 pole hall sensor outs. I started tuning it with LinuxCNC Pid > control. I just had it mounted on the table With no Load attached. Let > me just say the cogging Is very noticeable and almost impossible to > tune out. i wonder if it was under a load, it wouldn't be so > noticeable?
The added inertia of having a load would probably help. But looking at the specs, it says 8000 rpm max, with a 75/1 range, which is another way of saying its minimum speed is going to be about 107 rpm. I wouldn't be too surprised to find that it would be a quite nervous motor when asked to turn any slower than that for precise positioning, one 'step' might be more than a 1000 count encoders deadband. However I do not have any such motors, so I am 'reading between the lines' a bit. Your experiments of course will answer the question better that I can. > ------------------------------------------------------------------------ > ------ For Developers, A Lot Can Happen In A Second. > Boundary is the first to Know...and Tell You. > Monitor Your Applications in Ultra-Fine Resolution. Try it FREE! > http://p.sf.net/sfu/Boundary-d2dvs2 > _______________________________________________ > Emc-users mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/emc-users Cheers, Gene -- "There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order." -Ed Howdershelt (Author) My web page: <http://coyoteden.dyndns-free.com:85/gene> When one knows women one pities men, but when one studies men, one excuses women. -- Horne Tooke ------------------------------------------------------------------------------ For Developers, A Lot Can Happen In A Second. Boundary is the first to Know...and Tell You. Monitor Your Applications in Ultra-Fine Resolution. Try it FREE! http://p.sf.net/sfu/Boundary-d2dvs2 _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
