Most belt driven turntable projects are driven by only one motor, usually placed on the left side. The quality of the motors differ as does the belts. Sophisticated systems, such as TechDas Zero, AS 2000, Continuum, Micro Seiki 8000, Raven Black Night, VPI are using high quality motors.
Some developers are recommending three motors (Raven) or four (Burmester). What is the best way of bringing the table and its platter in the absolute adequate running position, not allowing any deviations or dragging the platter too much to one side?
I experimented with different installations and in most cases I found out that two motors to the left and right side connected with high quality belts, or as in this case with an Aramid Tape, is best (see also the Apolyt table).
Two Sperling motors keep the Aramid Tape fixed. You should not install the tape too hard rather than a „little loose“, just to keep the tension. You also need exact measurements of the distance as the tape comes in a fixed size.
Two VPI motors steering a Micro Seiki 8000 double platter installation.