On 12/05/2013 09:44 AM, Leonardo Marsaglia wrote: > Well I tried like Andy said increasing the ferror and I can work a lot > better. Also my acceleration was too much so I decreased it and now I have > a error of 0.2 mm without fine tunning and with the motor moving air for > now, I guess that when it's attached to the screw this will be a lot > better. > > One thing about that error is that the motor keeps oscillating between > those two points but never stops. Is this a normal behaviour on a bad > tunned motor? If I tune it well I would expect the oscillation to dissapear > or at least stop at some moment? > > Is this a flux vector drive, or a standard VFD? A flux-vector drive can perform the computations to keep the rotor excited without moving it. A standard VFD cannot, it has to move the motor to excite the induced field in the rotor. So, it will keep "dancing".
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