From: jamie_ka1lpa@charter.net   
      
   In article , no@spam.com says...   
   >   
   > I know what a servo motor is, and that you can get servo amplifiers (or   
   servo drives) to work with them, but what does it mean when a stereo system   
   says it has a servo amplifier?   
      
    The amp is the part that actually handles the high currents in the   
   motor coils.   
      
     The rest of it before that is the controller that generates the   
   signals and monitors the motor's position vie the internal feed   
   back sensors of the motor.   
      
    The control could be programmed to generate signal steps per step   
   command or scaled, meaning that multiple steps can be generated per   
   step command.   
      
    One step of the motor normally is governed by the type of motor   
   and its feed back system..   
      
    For example, systems with internal encoders of 5k or more per   
   turn have step spaces of 5K or more. etc..   
      
    The amplifier can be a dummy type or it could have additional   
   functions for current controls for step move and control settings   
   for holding positions etc. Normally additional IO is set up to   
   trigger these options from the controller itself.   
      
    It's best to get the controller and amp together as one. Also   
   depending on the system of design in mind, you can op for a   
   master power supply to serve a rack of servo drives or get   
   stand alones.   
      
   Jamie   
      
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