Thankyou Guys for the tips for getting this little 1982 treasure going again.I purchased this in around 1983, and have had this sitting around for many lean years when it was impossible to get thin belts.
A little post script to the story was I so so enamoured by the small NAMIKI motor in Aiwa, and their history of small motor development achievements. I took to ebay and stumbled across a new old stock item,well I couldn’t resist that !
What are the pros and cons of the cylindrical motors vs the flat ones? I know the flat ones can run in reverse. Can the cylindrical ones do this?
Both DC brushed motors and 3-phase brushless motors can run in reverse, despite in most cases DC ones are not used in this configuation. This is something that comes down to the drive circuit. This AIWA motor made by Namiki is part of a series of motors called coreless motors. Have been used in SONY DDs, TPS-L2 and a few others. Main advantage of such motors is the high torque to weight/size ratio compared to a conventional DC brushed motor. Unlike a typical motor where the rotor is composed of coils wound on metal armature, on a coreless motor the armature doesn't exist rotor being made only of the coils. Pics with inside of these motors can be seen here: https://stereo2go.com/forums/threads/wm-3-tps-l2-wm-3-motor-disassembly-and-maintenance.7424/ Flat ones are usually 3-phase burshless (but there are exceptions some being DC, although these are thicker), main advantage of these is they can be super thin while still achieving decent torque. Another advantage is because it doesn't have brushes, this type of motor will never wear out assuming the bushing is kept lubricated.
