Wednesday, November 08, 2006
Servo motors for damp and dusty environments
Rockwell Automation has extended the Allen-Bradley MP Series of servo motors with models suitable for use in the damp and dusty environments found in food and beverage packaging and materials handling applications. Available in four frame sizes, they provide continuous stall torque from 1.6 to 19.4 Nm and peak torque from 3.6 to 48.6 Nm IP 66 and 67. Rated to resist liquid contamination, the MPF Series servo motors share the performance characteristics of the MP Series, with extra features including a stainless steel shaft with hardened seal, quadruple o-ring seals for the connectors and a two-part food grade epoxy coating said Rockwell.
The lightweight, high-energy neodymium magnets in the rotors reduce inertia and allow rapid acceleration and deceleration.
That significantly increases productivity because machinery is positioned more quickly - output in a typical application could jump from 1000 to 1800 units per hour.
The segmented core design of the motors increases copper density, producing up to 50 per cent more continuous torque than conventional servo motors of the same size claimed the company.
There is a hardened shaft wear sleeve to ensure a long lasting shaft seal and shaft and food grade grease is used on the shaft seal.
Cable assemblies with food grade 2090 cables are available to supply power to the motor and carry feedback signals to a controller.
The cable jackets are designed to withstand harsh chemicals and the corrosion-resistant, nickel-plated connectors swivel 180 degrees to simplify installation without compromising the seal integrity.
Brake wires are included inside the power cable, so there is no need for a separate cable.
The maximum speed of the motors is 5,000 rpm, and a 24 V brake is available as an option.
The MP Series is available with high-resolution, single turn; or high-resolution, multi-turn absolute feedback options.
Multi-turn absolute feedback offers up to two million counts per revolution and the position of the rotor is sent to the controller instantly when the system is powered up.
No homing sequence is necessary, so start-up is faster and product waste is minimised.
Users can further boost the durability of the MPF Series motors by adding a positive pressure option.
That increases pressure inside the motor to prevent the ingress of moist air - particularly useful when the motor temperature cycles in a humid environment and may draw moisture into the casing.
Users will need access to a source of clean air at a pressure between 0.06 bar and 1.14 bar to use that option said Rockwell.
MPF Series motors are available in 230 V and 460 V versions, and are interchangeable with MP Series motors.
The lightweight, high-energy neodymium magnets in the rotors reduce inertia and allow rapid acceleration and deceleration.
That significantly increases productivity because machinery is positioned more quickly - output in a typical application could jump from 1000 to 1800 units per hour.
The segmented core design of the motors increases copper density, producing up to 50 per cent more continuous torque than conventional servo motors of the same size claimed the company.
There is a hardened shaft wear sleeve to ensure a long lasting shaft seal and shaft and food grade grease is used on the shaft seal.
Cable assemblies with food grade 2090 cables are available to supply power to the motor and carry feedback signals to a controller.
The cable jackets are designed to withstand harsh chemicals and the corrosion-resistant, nickel-plated connectors swivel 180 degrees to simplify installation without compromising the seal integrity.
Brake wires are included inside the power cable, so there is no need for a separate cable.
The maximum speed of the motors is 5,000 rpm, and a 24 V brake is available as an option.
The MP Series is available with high-resolution, single turn; or high-resolution, multi-turn absolute feedback options.
Multi-turn absolute feedback offers up to two million counts per revolution and the position of the rotor is sent to the controller instantly when the system is powered up.
No homing sequence is necessary, so start-up is faster and product waste is minimised.
Users can further boost the durability of the MPF Series motors by adding a positive pressure option.
That increases pressure inside the motor to prevent the ingress of moist air - particularly useful when the motor temperature cycles in a humid environment and may draw moisture into the casing.
Users will need access to a source of clean air at a pressure between 0.06 bar and 1.14 bar to use that option said Rockwell.
MPF Series motors are available in 230 V and 460 V versions, and are interchangeable with MP Series motors.
# posted by Medical Information : 2:39 AM
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