Product Details

AVSK

Magnetic Shield Kits for THIN-LINE™ Encoders

Protects from stray magnetic fields
1 Year No-Hassle Warranty
Works for AV56A, AV67A, AV85A and AV115 THIN-LINE III™ Encoders

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Description

Some applications require protection from magnetic fields from DC direct-acting brakes or other magnetic sources.

THIN-LINE encoders have internal electronic protection against common magnetic fields, but extremely high fields can produce signal errors (indicated by a red LED on the encoder).

Super magnetic shielding option 005 for THIN-LINE encoders includes this shielding bundled with the encoder for maximum protection. But for applications where an encoder is already in-place, the AVSK shield kit can be retrofitted to the existing encoder installation, providing magnetic shield protection to the AV56A, AV67A, AV85A and AV115 models.

Industry	Mining	General	Wind Power	Pulp & Paper	Oil & Gas	Marine	Metals	Machinery	Crane & Hoist
Light Mill Duty HS4 Encoder Programming Tool Cables and Connectors Encoder Couplings RUSH AV4 AV25 HS25A AV6A HS6A K661 AV6M AV4 HS35A AV20 DSR4 DW6
Mill Duty M185 DW6 Cables and Connectors Encoder Couplings AV32 HS35M HS6M K661 M3 HS35X DSR4
Heavy Mill Duty XRB3 AVSK Cables and Connectors AV56S XR45 AV44 AV45 AV56A XR5 XR12 AV85A HS45 K661 XP5 XR115 XR125 XR4F XR56A XR850 XR85A AV115 AV125 AV67A HS44 AV850 SMT1 DSR4
Severe Mill Duty XRB3 Cables and Connectors Encoder Couplings AV5 AV30 XR5 AV12 XR12 HS40 K661 M6C XP5 XPH1 XPH8 XR485 XR685 M7 AV685 AV485 AV30B DSR4

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PRODUCT GLOSSARY

Bearingless

These encoders use the bearings of the motor or machine, eliminating a huge source of failure in encoders. Also known as modular and sandwich encoders.
C-Face

A machined flange or elevated/recessed face provided on motors for mounting accessories. Typically provided on the drive end for gearbox/load mounting, C-faces may also be provided on the non-drive end for mounting encoders, brakes, and other accessories.
Cam Screw Rotor�

A Cam Screw Rotor eliminates the problems associated with slipping rotors of other types; it uses two cam (eccentric) head screws. The screws are preloaded into the rotor; simply rotate them (approximately 90�-180�) to fully engage the shaft (4-6 ft-lbs) using a standard hex (Allen) wrench. Cam screw rotors are available on AV850, AV56, AV67, AV85, and AV115 THIN-LINE II� encoders. Cam Screw Rotor Patent # 7,485,997. Cam Screw Rotor� is a trademark of Avtron.
Magnetic Encoder

Magnetic and magnetoresistive encoders typically use a magnetized rotor with north and south poles lined up around the perimeter of the disk. A magnetoresistive sensor detects the transitions, and these are the counts or pulses generated by the encoder. Magnetic encoders withstand dirt, dust, water, and temperature changes far better than optical encoders.
Magnetic Rotor

A magnetized disk with multiple north and south poles lined up around the perimeter of the disk. A magnetoresistive sensor detects the transitions and generates the pulses generated by the magnetic encoder.
Motor Shaft Currents

The high-speed switching of variable frequency drives that is used to control the speed of motors often produces current which flows from the motor shaft to ground, or from end-to-end of the motor. These current are highly destructive to both motor and encoder bearings. Preventing shaft current damage is essential. Most Avtron hollow shaft encoders include features to prevent motor shaft current damage. For more information: http://www.avtronencoders.com/knowledge-base/eliminating-damage-from-motor-shaft-currents-through-tachometers-and-encoders or visit Wikipedia: http://en.wikipedia.org/wiki/Shaft_voltage
Shaft Current

The undesirable electrical current flow common to motors controlled by variable speed drives. This current attempts to circulate within the motor or discharge to ground. Avtron encoders are protected against shaft currents.
Wide-Gap Technology

Avtron encoders use special optical sensors and magnetoresistive sensors, combined with proprietary circuit designs to allow the sensor to be located much farther from the magnetic rotor or optical disk. This eliminates sensor crashes and makes mounting easy and forgiving of mechanical variation.

Related Products

AV56A

AV67A

AV115

AV85A

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AVSK

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