Air Float Turntable TAT1

TOPProductsTAT1

Exact unspecific rotation performance.

Unit model which added customizing and extensibility more with remaining the high performance of LFT1

Turn Table Unit

It is a unit that keeps the disc at a constant speed and becomes a base of rotation without noise addition.

Motor Drive Unit

It is a unit for continuing to give accurate rotation without fluctuation to the platter that receives the disc.

Pump Unit (Sold separately)

It is a unit to supply high quality air to make the platter float.

Tone Arm Attach (Sold separately)

Two arm configuration possible with combination of base plate and various attachments.

Ultra heavy-duty designed that suppresses unnecessary vibration
Turn Table Unit

Thought on image stabilization of TAT1

Thought of vibration isolation

Analog disc is a recording of sound vibration directly on a disk in micron unit.Therefore, it is strictly prohibited to add vibrations other than those recorded in the sound groove.There are two ways to suppress transmission of unnecessary vibration. It is shielding and damping.
High frequency vibration can be damped by vibration isolating materials, but low frequency vibration can not be shielded or attenuated with vibration isolating material alone.Therefore, it suppresses vibration by adding weight as a so-called thick walled concrete wall which has both functions together.

A stable base with granite

Stable heavy granite base

On the base of the turntable, we use 40 kg of granite (granite) stabilized over 5 million years. Unnecessary vibration transmitted from the floor surface is suppressed by this weight and vibration damping characteristics of granite. Granite is used as a reference for making a mother machine (machine tool) as a stone surface plate, it is processed to the highest grade JIS 0 grade flatness of 5 microns, and a distance of several tens of microns on top of it While keeping the floating platters are spinning.

エアーフローティングされた超重量級プラッター

Air floated ultra heavyweight platter

In order to obtain stable rotation, a platter with a large moment of inertia is required, but in the case of a mechanical bearing, a large force is applied to one point and wear progresses, unnecessary vibration is generated and a signal of sound I will miss it.
In TAT1, a platter with a high inertia moment of 344 mm in diameter and 27 kg in weight made of stainless steel of super bowed bow is rotated. The weight of the platter is handled by the pressure of the air, and only the force of about several hundred grams applied in the lateral direction is handled by the metal bearing, thereby realizing a structure that does not cause unnecessary vibration and long-term reliability.
If you support the platter with one point and hit it, you will hear a metal sound, but if you float it with air it will be a jerky sound. By damping with the air film, integration with the base becomes possible, and unnecessary vibration can not be pulled.

Adhesion of analog disk and heavy weight stabilizer

Heavy weight stabilizer for adhesion of analog disk and platter

Place where the platter and the analog disc are in contact are tapered and pressed with a heavyweight stabilizer to get close contact between the record board and the platter, suppressing unnecessary vibration when the needle point traces.

Two arm configuration possible with combination of base plate and various attachments
Tone Arm

Two arm configuration possible with combination of base plate and various attachments

Cartridges not included

Two arm configuration possible with combination of base plate and various attachments

Precise rotation performance to minimize extremely fluctuation
Motor Drive Unit MDU1

Thought of platter drive of TAT1

In order to pick up sound accurately from the analog disc, the rotation of the platter must be rotated at a constant speed without any "fluctuation". In general, accurate rotation is obtained by servo control by negative feedback, but at the micro level, if it rotates or becomes faster, it detects it and slows it, and repeats the operation to make it faster if it gets slower.
Although this level and cycle are determined by the gain of the control system and the loop speed, the period of the speed control of the platter which is the mechanical system surely comes into the audio band. In general, accurate rotation is obtained by servo control by negative feedback, but at the micro level, if it rotates or becomes faster, it detects it and slows it, and repeats the operation to make it faster if it gets slower. If you try to measure a period with a small level, you can not measure the instantaneous state, so you should measure the average value.Therefore, fine vibration generated by servo control can not be measured by the measuring instrument, it depends on the human ear.
TAT1 hates this vibration and lacks convenience, but in addition to selecting an open loop control that does not apply servo control, it also shuts out noise generated from itself and noise from the outside.

Synchronous motor

In the direct drive as well as the motor speed control it can not escape the vibration caused by the servo control. Although there is no servo control amplifier in the synchronous motor, unnecessary vibration is small, but the permanent magnet of the rotor constantly controls the deviation from the rotating magnetic field, and due to processing precision of the rotor, variation in magnetization, variation in windings Vibrations are occurring.

Non-feedback motor control

Non-feedback motor control

In TAT1, the rotation control is not performed, and the constant speed rotation is left to the high moment of inertia of the 27 kg platter, creating a rotation free from unnecessary vibration caused by the control. Only the positive direction force is applied from the motor, but by using a coreless motor with less moment of inertia, the influence of the vibration is reduced. Motor rotation control with no negative feedback · The XFD method realizes a drive with the minimum fluctuation.
*XFD method:Based on a crystal oscillator with high frequency precision, a direct digital voltage generator is formed to supply a voltage with high precision without fluctuation. It is a system that "CSS port" developed independently by CS Port which drives super-heavy platter with light load bearing with low inertia coreless DC motor.

Adoption of thread drive

There are various methods such as gear drive, rim drive, belt drive, etc. to transmit the power of the motor to the platter, but LFT 1 adopted Kevlar's yarn drive with four knitting yarns stronger than iron. On the other hand, because it is hard to convey the vibration of the motor and the elongation is small, it plays the platter firmly

Setting and checking rotational speed by strobe

Setting and checking rotational speed by strobe

A strobe set to 33 1/3 and 45 revolutions with a crystal transmitter as a reference places marks engraved with high precision with a laser on one side of the platters.
Adjust the rotation speed with the + and - speed setting buttons, and the rotation accuracy can be judged by the strobe mark.

Air Pulse pump flow highly trusted in medical field
Pump Unit POU1 (Sold separately)

Pump Unit

Pump Unit

It is an air pump unit for raising TAT1. The air pump is driven by 12 VDC supplied from the motor drive unit, and by adopting a motor type pump used in medical equipment etc., it gave stable operation for a long time.
Because the compressed air coming out of the pump is a pulsating flow, it can be supplied as compressed air with no ripple and vibration by Π type filter.
Furthermore, it adopts a sound leakage prevention system with a double sealed structure, and maintains quietness enough even if it installs in the listening room.

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Product summary

Air Float Turntable TAT1

Specification

Type TAT1

Turntable / motor drive unit

Base JIS 0 class granite surface plate base
Platter Air float 27 kg High inertia stainless steel platter
Drive system Quartz-follow No feedback motor drive XFD method
Rotation transmission method Yarn drive (four-fiber aramid)
Drive motor DC coreless low noise motor
Rotation speed 33 1/3 and 45 rpm Switch switching With rotation fine adjustment
Speed accuracy ±0.3%
Wow and flutter Wow 0.2% , Flutter 0.04% less
Power supply AC100/120/200/240V 50,60Hz
Power consumption 40W

Weight / Size

Base 40kg/358×358×120
Platter 27kg/φ344×43
Motor drive unit 8kg/130×358×120

その他

Accessories AC power cable , two drive yarns , Φ4air tube
Options Pump Unit POU1 , Base plate BPL1 , Swing arm Attachment SAA , Linear arm Attachment LAA1

See Detail

Warranty period 5 years (excluding consumables) registration is required

TAT1

TAT1

Heavyweight Player Board LPB1

Heavyweight Player Board LPB1 (Sold separately)

Dimensions

Dimensions

Base plate BPL1

Base plate BPL1 (Sold separately)

Linear arm Attachment LAA1

Linear arm Attachment LAA1 (Sold separately)

Swing arm Attachment SAA

Swing arm Attachment SAA (Sold separately)
according to your tone arm

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