A New Method of Reducing Direct-Drive Motor Vibration in Turntables

Fujimoto Y, Suzuki M, Fujio K, Sasamoto K, Satoh Y. A New Method of Reducing Direct-Drive Motor Vibration in Turntables. In: AES Convention 70. Audio Engineering Society; 1981. Paper 1837. Available from: https://aes.org/publications/elibrary-page/?id=11917

@inproceedings{Fujimoto1981_11917,
  author = {Fujimoto, Yasuhiro and Suzuki, Masao and Fujio, Kazuyuki and Sasamoto, Katsumi and Satoh, Yuji},
  title = {{A New Method of Reducing Direct-Drive Motor Vibration in Turntables}},
  booktitle = {AES Convention 70},
  note = {Paper 1837},
  year = {1981},
  month = oct,
  publisher = {Audio Engineering Society},
  url = {https://aes.org/publications/elibrary-page/?id=11917}
}

TY  - CPAPER
TI  - A New Method of Reducing Direct-Drive Motor Vibration in Turntables
AU  - Fujimoto, Yasuhiro
AU  - Suzuki, Masao
AU  - Fujio, Kazuyuki
AU  - Sasamoto, Katsumi
AU  - Satoh, Yuji
T2  - AES Convention 70
M1  - Paper 1837
PY  - 1981
DA  - 1981/10/06
UR  - https://aes.org/publications/elibrary-page/?id=11917
PB  - Audio Engineering Society
LA  - en
AB  - As a direct-drive motor rotates, there are action/reaction forces set up between the platter and base (cabinet), and between the motor rotor and stator. These lead to tonearm vibrations which cause poor sound reproduction. This paper describes how these forces can be minimized by adding a second motor or torque generator. The main drive motor and second motor or torque generator are driven in reverse phase, which greatly reduces base (cabinet) vibration in the rotational plane. This technique provides a substantial improvement in tonal quality.
ER  -