this may or may not be a problem.. but i've been noticing lately that my gen7 machine has to "warm up" so to speak at the beginning of a session. meaning i have to set my power supply at say 9.5, and it sounds like the machine starts off slowly, and then starts getting faster and faster until it hits a consistent hum at what 9.5 should sound like.

has anyone else noticed this? is it even a problem? should i be keeping an eye out for another rotary for replacement? just curious.. i'm very new to rotaries.