ddarch wrote:Disappointed to report OL would not provide me with free sample belts for 160 and 125. Here I am selling over a 100 vintage Thorens turntables a year, buying 1-2 Motor kits from OL a month the past six months, and they won't send me a couple of belts to review? (Not to mention I've got 3500 followers on Facebook and had over 100,000 views of my DIY vids on Youtube)
Oh well...their loss. I'm perfectly happy using the Thorens logo belts for which I am a dealer and for which I never have anything but 100% complete success.
Interesting David I just ordered a belt for the TD160 and TD124 to do some testing concerning speed.
Since you are selling as much Thorens tables how are your results with the original Thorens belt and the Thakker ?
By the way OL said that the thickness has no influence on the speed !
Hang on, forgive me for this 'Physics-Noob' question, but I'm really confused now about the thickness of the belt influencing the speed.
As far as I can see, using common sense rather than knowledge, the speed of the TT-platter is determined bij the ratio between the circumference of the pulley and the circumference of the (sub)platter, with the pulley running at a certain speed. I made a graphic image to explain why I think that the thickness of the belt has no direct correlation to the speed of the platter.
When you look at the pulley (left, black) the length of certain part of the circumference (I used a quarter) is much smaller than the same quarter section on the (sub)platter (black, right), and therefor the bigger (sub)platter turns at a much lower speed than the pulley. I think the equation is Pulley Ø divided by Platter Ø = X and Pulley speed times X = Platter speed. Right?
Take a look at the platter on the right, where I called the length of that quarter section A > A'
Now look at the thin belt (green), where B > B' is only slightly longer than A > A'
And finally look at a very thick belt (red) where C > C' is quite a bit longer than B > B' and A > A'
The way I see it (but I may be wrong) is like this; the speed of the belt measured on the outside (C > C' or even B > B') will certainly be higher than the speed measured on the inside (A > A') because the outside travels a larger distance in the same amount of time, but no matter how thick you make the belt, the speed of A > A' will always be the same because the ratio between the circumferences of the Pulley and the Platter does not change, nor does the speed of the pulley (well, at least theoretically, a very
tight belt may cause drag from the bearing). If the belt would be a chain, like on a bicycle, the outcome would be the same I guess...
Is my logic flawed? If so, please enlighten me. In simple language please: I'm a physics-noob, remember? :lol: If you use all kinds of funny equations I probably wouldn't understand half of it.