The Palmer 2.5 uses AC synchronous motors which may be somewhat unfashionable these days. AC motors are used to accurately power clocks and medical equipment, surely a fine indication that they are very good timekeepers. They rely solely upon the frequency that they are provided with and cannot deviate from that.
A DC motor needs a feedback loop to tell it to either go faster or slow down. However, it can only be told to do this once the error has occurred and so may be in a constant state of change however small
Only the amount of power required to maintain the constant stable rotation of the high mass platter is supplied . Anything more than this is simply "noise"
Like a fine watch movement, it is a delicate balance that provides a state of harmony between the drag and inertia.
Starting a palmer turntable requires you to interact with it, much like winding a mechanical watch It soon becomes second nature to spin the platter with just the right amount of force so that it is running to speed instantly.
So then, an Holistic approach to turntable design, every component is considered in how interacts with its neighbour so that the sum of the parts is exceeded by the whole