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Motor Shaft Currents

White Paper: * Eliminating Motor Shaft Currents through Tachometers and Encoders
Customers may select from one of the following methods to avoid bearing damage from shaft currents.
Shaft Isolation:
	The encoder is electrically isolated from the motor shaft, either via non-conductive shaft or housing or a non-conductive insert.
	Available models: HS25A, HS35A, HS35M, M3-(3-9, A-H), M4-(3-9, A-H)
Anti-Rotation Arm Isolation:
	The encoder is connected to the shaft, but the anti-rotation arm is electrically isolated from the motor housing.
	Available models: HS25A, HS35A, HS35M, M3-(3-9, A-H), M4-(3-9, A-H), M6-(4-7), M685
Modular Encoder:
	The encoder’s two parts, magnetic rotor and stator, are not connected mechanically or electrically, nor does the encoder have bearings to be damaged.
	Available models: AV850, M56, M67, M85, M115, M1250
Isolated Coupling:
	The solid shaft encoder is coupled to the motor shaft with a non-conductive coupling such as the Thomas 50CB Center Insulated.
	Available models: AV20, AV25, M3-(1-2), M4-(1-2), M6-(1-2), M485, M925, M945
Shaft Grounding Kit:
	The encoder is provided with a conductive brush that contacts the motor shaft and discharges the voltage before it damages the motor or encoder bearings.
	Available models: AV850, M3-(1-2), M3-(3-9, A-H), M4-(1-2), M4-(3-9, A-H), M56, M67, M85, M115, M485, M685, M1250