Igor Chudov wrote: > Now, my servo motor with the attached resolver still out of the rotary > table, I have a HYOOGE success! > > The cause of jerkiness was a TOO HIGH input voltage to the resolver.I am > hypothesizing that this caused too much voltage to be passed into the > resolver converter input, causing it to crowbar or otherwise curtail the > input for safety reasons, therefore curtailing and messing up the encoder > calculations involving sine and cosine trigonometry. > > No "crowbar", just overranging the A/D and causing the trig to not solve accurately. > I found it out because I thought, incorrectly as it turns out, that the > voltage was too low. I increased the input voltage (by means of changing > jumpers on Jon's resolver converter) and that made a bad problem truly > horrible! The motor was now jerking like, um, let me just say it was jerking > way too much. > > So, I went the other route and decreased voltage, which decreased > jerkiness. > > At the lowest voltage, as it turns out, the motor turns smooth as a clock! > Yes, you must have 1:1 resolvers, so all jumpers in is right. That's the way I test them with my resolver on the bench.
Glad you got it fixed. Jon ------------------------------------------------------------------------------ Special Offer-- Download ArcSight Logger for FREE (a $49 USD value)! Finally, a world-class log management solution at an even better price-free! Download using promo code Free_Logger_4_Dev2Dev. Offer expires February 28th, so secure your free ArcSight Logger TODAY! http://p.sf.net/sfu/arcsight-sfd2d _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
