The ULT Series of direct-drive frameless motors from Applimotion (Loomis, CA) is available in sizes down to 27 mm in diameter with axial length to 8 mm and up to a 20-mm through hole. They operate from traditional three-phase trapezoidal or sinusoidal motor controllers ranging from 12 to 320 volts DC. They can achieve speeds to 10,000 rpm, which may be useful in some scanning applications. Hall devices and cable/connector options are available. ULT motors are suitable for applications needing direct-drive low-profile motors such as optics applications and direct-drive rotary table systems. The ULT motors can be used for precision positioning with the user of a high-resolution encoder or for continuous scanning in medical devices, computer component manufacturing, or optical inspection.
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