Even in a closed loop system some speed variation will occur. An error must exist between the setpoint and actual before the system will react. A certain deadband around the setpoint exists or else the sytsem would hunt, ie. cycle about the setpont which would be much worse. That is the theory. I do not know the details of the actual tt design. It is analogous to the cruise control on your car. You are at a set speed and come to a hill. Notice the speed drops one or two mph as the engine increases torque to compensate. The same happens as you go down a hill; the speed increases one or two mph as the engine torque decreases. But in the case of our high end turntables, I think the designers have the platter speed held to within 2 decimal places under moderate load variations due to needle drag.
Stylus Drag
Hello all,
I was wondering, does stylus drag vary significantly based on the musical content of a record: frequency or dynamic vs slow passages? If it does vary based on the musical content is this amount insignificant relative to the amount of overall drag arising from the friction of the needle in the groove?
The resaon I'm asking is to understand that even if the speed setting is compensated for stylus drag if at a micro level it is still varying based on the musical content and if this is heard sonically.
Thanks,
Andrew
I was wondering, does stylus drag vary significantly based on the musical content of a record: frequency or dynamic vs slow passages? If it does vary based on the musical content is this amount insignificant relative to the amount of overall drag arising from the friction of the needle in the groove?
The resaon I'm asking is to understand that even if the speed setting is compensated for stylus drag if at a micro level it is still varying based on the musical content and if this is heard sonically.
Thanks,
Andrew
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- 51 posts total
- 51 posts total