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AMO's proven and original technology for length and angle measurements uses techniques for scanning high precision graduations consisting of structures photo-lithographically etched onto steel. Based on this, inductive sensors and integrated evaluation electronics (in ASIC) have been developed further, to create a new and powerful generation of measuring systems.

The AMOSIN^® angle measuring systems are open hollow-shaft measuring systems, and generally therefore do not have their own bearings, nor do they require any couplings for mechanical connection.

Operating entirely on an inductive basis, the AMOSIN^® systems achieve high precision figures as close as +/- 5 μm arc length, but are nevertheless able to resist environmental influences such as dust, humidity and are highly resistance to shock and vibration.

The high precision is mainly due to the procedure used to manufacture the rigid steel measuring ring, and to the exceptionally high quality sensor signal, with deviations in the sine wave down to < 0.1 % harmonic content, as a measure of the achievable interpolation precision within the grating pitch.

The measuring system does not include any magnetic parts (either in the scale or in the scanning head). As a result it is not at all sensitive to electromagnetic interference of any kind and has no hysteresis in contrast to magnetic measuring systems.

The system's output interfaces either 1 Vpp sine/cosine signals, or RS-422 square wave signals in real-time.

The wide range of available AMOSIN^® angle measuring system types means that they can be used for large application fields from the slow, extremely precise positioning of a turntable through to the high speeds and the closely controlled velocities of a machine spindle. They are of valuable for drives where high dynamic range and stiffness is required.

Properties - The New Generation:

• Analog output signals (1 Vpp) can also be delivered, with a reduced signal period, down to arc lengths of less than 40 μm (the basic period of 1000 μm can be divided by a factor of up to 32).
• Digital output RS-422 / TTL with decimal resolution (in arc lengths): 0.25 μm (1000 μm/4000) and 1μm (1000 μm/1000).
• Input frequency (speed of rotation) for analog and digital outputs significantly increased (analog up to 46,000 rpm).
• Introduction of the product group with a grating pitch of 3000 μm for very large assembly tolerances and rotation speeds above 100,000 rpm.
• The standard working temperature range has been enlarged to 0-70 °C.
• Dependency of the precision of the system on the operating temperature has been significantly reduced.
• Scanning head clearance (air gap between the scanning head and the measuring flange) and its tolerance have been increased.
• The effects of mounting deviations within the specified tolerances on the precision of the system have been greatly reduced.
• Miniaturization of the evaluation electronics, which has permitted integration of this circuitry into the connector housing.