Hy all, after a long time I 'm back to the forum.
I think what Im asking today is a common problem discussed tonns of times,anyway, I Just want to ask if there is a definitive Way to drive a sincronous ac motor, the classic premotec Many users have for their turntable project. My turntable runs very well and precise but I need little corrections somtimes,speed is supsceptible of spindle temperature humidity, belt age and all the common mechamic problems a turntable normally have. If you know a good way to point me would be fantastic.
The motor is frequency dependant, so I know is difficoult that someone has already developed agod project, but for sure if there is any way to do it I will like always I will found the right informations here
I think what Im asking today is a common problem discussed tonns of times,anyway, I Just want to ask if there is a definitive Way to drive a sincronous ac motor, the classic premotec Many users have for their turntable project. My turntable runs very well and precise but I need little corrections somtimes,speed is supsceptible of spindle temperature humidity, belt age and all the common mechamic problems a turntable normally have. If you know a good way to point me would be fantastic.
The motor is frequency dependant, so I know is difficoult that someone has already developed agod project, but for sure if there is any way to do it I will like always I will found the right informations here
Have a look in the Technics SL1200 turntable service manual to see how it works and then build one yourself.
copying a technics diagram is not applicable as they use multi phase stepper motors. Not sure what your TT motor looks like, but I built a 1 phase 230 VAC supply for my EMT930 and later TD124 by using a low distortion digital sine wave generator (china), a Quad 405 pow er module followed by a 24 VAC toroid getting me back to an extremely clean, Xtal stabilized 230VAC. Runs very quiet!
This is the motor Version I use in my turntable, snd if possible I font want to replace due to the cost itself.
Is the 110/230 volt Version, so it would need a board that can modulate the frequency at 110 or 230 volt.
The sokution to use a frequency generator or a fixed frequency player also, is a bit trcky but also possible. I Can find the Exact frewuency I need then I can use a whatever player to play that frequency, amplifing it to the required voltage the motor beeded.
Vety very intresting ;-) below the scheme of the motor from the original datadheet.
Luis
Oh snother little thing.
Sorry for how I qrite bad, sadly I had an important brain ischemy, yhat throw away my lleft part of my body, the dominant one, so my left arm and leg doesnt work anymore, daid about 15%,but newer give up, I have always some project in my mind and my family that make me happy! 🐱🐱🐱
The setup of triodes4everwill be oerfect, if you can ikkustrate ir show your setup will be amazing.
Luis
Sorry for how I qrite bad, sadly I had an important brain ischemy, yhat throw away my lleft part of my body, the dominant one, so my left arm and leg doesnt work anymore, daid about 15%,but newer give up, I have always some project in my mind and my family that make me happy! 🐱🐱🐱
The setup of triodes4everwill be oerfect, if you can ikkustrate ir show your setup will be amazing.
Luis