|
If you look at all other turntable brochures today, nobody really wants to talk about their motors, because they are not at all up to the desired standards! In the sixties we had much better motors, At that time you could buy exelent flywheel motors which had a controlled feedback system with an optical encoder! Wich means, on the side of the flywheel there were marks, which were detected optically and sent and this devise was controlling that the motor was running exact with the same speed.
The Sati motor is not a flywheel motor but a flat high enerti 12 pole motor with three hall elements which are controlled by an optical encoder 2048 times every time the motor runs one rpm, no other motor on todays turntables has a 12 pole BRUSHLESS DC MOTOR.
The old SATI motor was a two pole brushless motor from Origin Live and they also made the analog speed control, but this motor had difficulty in running with the same speed, it was drifting, many owners of Thorens, Lin and others have upgraded there turntables with this Origin Live motor. In America they also uses this small two poles motor on Teres turntables and others.
Clear Audios referense turntable uses a 4 pole motor but unfortunately with low enerti and much less horsepower, in comparison to the SATI motor is like a 12 cylinder motor over a 4 cyliner. Low power together with light plastic platter gives a constant velocity (speed). High super constant running motor with great enerti with high mass platter gives many times better constant speed.
|
|
|
|
Well, the 12 pole SATI motor is controlled in a unik way because its not controlled in standard digitally way. It’s controlled by three soft sinus wave signals.
In the very beginning I had developed a tube controlled powersupply which was controlled a very good Papst pancake motor, This had the wanted soft wave control, but only one wave.
If you use digitally zero to one (with 0-1) control, will it control the motor very hard! On the scope you can see it as small zigzag peaks, the motor do not like these peaks and will act acordingly (it will not flow fluently). This is very easy to hear in comparison. 90% of high end turntables are controlled this way.
With the new SATI motor with high power output, the single soft wave is expanded to three soft waves, and these are controlled by three hall elements, which al the time are controlling the 12 poles to run in exact and constant speed. The more times the motor is controlled, the more exact it is running, and now we are free of all this drifting every time we turn on the turntable and we are also free of the digital distortion where the motor runs zigzag.
The old motor weight was 36 gram the new is 0.7 kg. Furthermore, the new motor employs soft start, it takes about 6 seconds before it’s running full speed.
|