On Sun, Aug 13, 2023 at 5:20 PM Nigel Johnson Ham via cctalk <cctalk@classiccmp.org> wrote:
> The DEC Rainbow RX50s only have one motor :-) {being pedantic} No they don't. They have 2. A permanent-magnet DC motor used to drive both spindles and a stepper motor used to position both heads. But I will agree it is a lot more usual for a dual floppy drive to have separate spindle and positioner motors for the 2 disks (Actually don't the Persci dual 8" drives with voice coil positioners have a common spindle motor and head positioner for the 2 disks?) -tony