RE: Coreless Servos
I have been doing some testing of servos. I cannot find a lot of difference between the centering accuracy of coreless and non coreless motors. That is under a loaded condition. In the no load condition the coreless servo appears to be better.
The digital servo is a lot better than the non digital servo. An explaination of why is on the Futaba WEB site under digital servos. Again I can't find a lot of difference between the coreless or non coreless digital servo.
For why the 5 pole motor is better than the 3 pole motor go to the library and check out a book on DC motors. You won't find an explaination of coreless motors in the book because outside of our field they are rarely used.