Gene Heskett wrote: > And I never considered the iron loses Jon, but you are dead on. > Mariss Freimanis of Gecko describes some torture tests he did years ago and reported this. > > >> I make affordable servo amps for brushless motors, and >> have one on my minimill. You do need to get rotor position >> info from the motor, most small ones have Hall sensors that >> you connect to the servo amp. I use 500 cycle/rev encoders >> on mine, that is quite satisfactory. >> >> Jon >> > > That also makes great sense as long as its economical enough to do. > > The Gecko 201 series sells for $114, my brushless servo amp sells for $150, for 20 A at 120 V. Not vastly more expensive than a good stepper drive. Of course you need a PWM generator to run my servo amp, but then you need a hardware step generator to get full performance out of a microstepped stepper motor, too.
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