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The functional relationship between the drive belt, sub-platter, and motor pulley, can be seen through the glass platter on a Rega Planar 3.. There are three main types of phonograph turntable drives being manufactured today: the belt-drive, idler-wheel and direct-drive systems; the names are based upon the type of coupling used between the platter of the turntable and the motor.
In a direct-drive turntable the motor is located directly under the center of the platter and is connected to the platter directly. It is a significant advancement over older belt-drive turntables for turntablism, since they have a slower start-up time and torque, and are prone to wear-and-tear and breakage, [5] as the belt would break from backspinning or scratching. [6]
Early belt-drive turntables were unsuitable for turntablism, since they had a slow start-up time, and they were prone to wear-and-tear and breakage, [9] as the belt would break from backspinning or scratching. [10] The first direct-drive turntable was invented by Shuichi Obata, an engineer at Matsushita (now Panasonic), [11] based in Osaka ...
Direct-drive turntables were changing the habits of radio professionals; a rigid coupling between the motor and the platter was desirable for quick starts and stops. Accordingly, as the idler-wheel concept was beginning to look old-fashioned, EMT followed the example of National’s SP-10 and proceeded to build a direct-drive turntable: the ...
In a belt drive system, idlers are often used to alter the path of the belt, where a direct path would be impractical.. Idler pulleys are also often used to press against the back of a pulley in order to increase the wrap angle (and thus contact area) of a belt against the working pulleys, increasing the force-transfer capacity.
Most users remove the rubber turntable mat and replace it with a slipmat for mixing. However, without the rubber mat, the platter is prone to resonance at 250 Hz when used near a large club sound system. The drive system designed by Matsushita is direct-drive rather than the more commonly found belt-drive type, a less expensive design. The ...
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