Capstan motor having a ceramic output shaft and an adhesively attached capstan

摘要

A permanent magnet, direct current capstan motor for use in moving magnetic recording tape in a start/stop mode at a high repetition rate, wherein a lightweight motor armature is shaft-connected to a tape drive capstan by means of a nonmetallic, ceramic, monocrystalline aluminum oxide shaft. The capstan is adhesively attached to one end of the ceramic shaft. The shaft performs the multifunctions of maintaining a high mechanical resonant frequency for the motor's rotating assembly, magnetically isolating the magnetic recording tape from the motor's magnetic field, and heat insulating the capstan's adhesive interface to the shaft from the heat source formed by the motor's armature.