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31-12-2017 #11
I don't know if anyone has done a controlled side-by-side comparison of the AM882 and the EM806. I bought the EM drives for my machine as I was fed up with buying things that seemed to go obsolete almost as soon as they were delivered and the EM series was still fairly new on the street, with supposedly better anti-resonance algorithms, etc. That was around 3 years ago but the AM drives are still going strong! However, I can say that I am very happy with my EM drives - no resonances ever been apparent, and the anti-stall is very useful if for some reason the gantry has gone out of square and loads get too high on rapid feed. Machine stops quickly without tearing itself apart. Would the AM drives have worked as well? Dunno!
One day I'll make up a serial cable and try to set up the autotune properly. Still slightly confused about how that's supposed to work with a dual-motor setup as you clearly can't do it with the motors connected to the ballscrews, but it doesn't seem to make sense to try to tune the motors when they're unloaded.
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