Need to adjust the speed every time I turn on turntable

The grid is constantly adjusted to within 0.5 Hz of 60 Hz. It tries to vary with load. Higher loads tend to slow it down. The number of cycles per day is held to a constant (so clocks will stay on time). Any spurious signals contained on the line would not effect this frequency or the operation of any AC motor. AC is the preferred way of transmitting  electricity to customers because it is way safer, more efficient and lower maintenance than DC. Westinghouse 1, Edison 0.  The grid is protected from local occurrences by transformers, those cans hung up on the poles that reduce the voltage from kilo volts down to 120 per leg. Transmitted power has three legs at 120 degrees. Industrial zones get all three legs and have "three phase power." Residential areas get only two legs which sucks if you like big woodworking machines. You have to get a phase converter and manufacture the third leg. I digress. One fart from cleeds and the whole electrical grid will collapse.  

Testpilot, well then I guess origin live has some work to do. A turntable should be a set it and forget it device. Drifting motors and controllers is not acceptable in this day and age. Neither my SOTA or SME vary at all, cold, warm, upside down or sideways. The SOTA I check maybe once a year and it might drift a little. The SME not at all.  

I do not think so testpilot. He is setting the motor speed when it is cold. It should be the same next time he checks it cold. dcaudio, next time you start up check the speed but do not change it. Get an idea of how many dots drift by a fixed point in 10 seconds. Lets say it drifts 5 dots in 10 seconds. Check the speed again when it has warmed up for 30 minutes. How many dots does it drift now. Let us know what happens!!