Underside of the mechanism showing a stroboscopic flywheel with black and white stripes for calibration. A sticker says MPI Model 101S. A black stepper motor can be seen in the upper right, which drives the read-head assembly

Notices where this attachment appears

1. Embed this notice
   root42 (root42@chaos.social)'s status on Sunday, 26-May-2024 01:50:57 JST root42

   in reply to

   Interesting! The two mechanisms are slightly different! Drive unit 1 is a 101S and drive unit 0 is a 101SM. I wonder what the differences are, except for the slightly different motor.
   To me the motors look exactly like the tacho motors used on the Micropolis mechanisms. I do have one or two spares should the need arise...