Langer No.7 im Test LP-1/2014
Langer No.7 Hifi&Records 3/2016
Langer Direct Drive
Solid motor design combined with innovative speed control.

Motor:
The motor design is brushless. It used Hall sensors and an integrated electronic board for commuting the motor coils. This is a must for a smooth motor movement and for elimination of distortion by usual brushes. The motor coils are air core types. So there is no magnetic rest point or hysteresis loss. An optical sensor is used for continuous speed feedback.

As the motor bearing is also the platter bearing, we spent special attention on its design. The radial force is carried by a precision sinter metal bearing. For the axial forces, we spent the motor a bearing bottom out of polyamide. This design guarantees very low noise movement and high precision bearing gap, combined with long life.

The rotor unit is also a sub platter. So it is easy to combine with al kind of platter designs. All motor components are integrated is a solid metal housing, which eliminates all kind of vibration.

Speed Control:
For our "langer" motor, we designed a special speed controller. This controller is an analog design. That means we use an analog signal for the motor speed feedback and compare it with an analog reference. The output signal to the motor is again analog. In combination with a correctly designed platter, the signal to the motor is a simple line, absolutely low level and flat. In normal drive condition, the motor acts just as a precision bearing plus a little energy for the friction losses. Only in start mode or at higher break forces, it increases the drive current accordingly to the needed level. Long waiting times for stabilized platter speed as a compromise for low wow and flutter and low noise, is no longer needed. The "langer direct drive" features both without compromising.

Components for DIY and OEM partners:
We do not use our drive technology exclusively only in our turntables. We also offer them as components for high quality DIY projects or OEM partners. The integration of our technology in other projects is very easy by design.
direct drive -
evolution continues
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