• UHV Stepper Motor
• Specifications
• Stepper Motor Drives

The electromecanical efficiency of AML motors have been optimised so that continuos running in UHV at high torque and low outgassing is possible. They are particularly suitable for beam-chopping and fast sample-translation applications. 
 

• Proven technology; similar AML motors have been in constant use since 1986. 
• All insulating materials are self-coloured polyimide or PEEK, with exceptional outgassing and insulating performance.
• Improved hybrid ceramic bearings for longer life and reduced friction after multiple bakeouts.
• Electrical connections reduced to only 6 durable polyimide film-coated wires.
• Simplified connection with MLF12 bakeable lead feedthrough and connector kit.  (Not included)
• Greatly reduced outgassing and temperature rise due to improved design, materials, surface finish and construction.
• Surfaces are etched and coated with a matt black diamond-like film for increased emissivity and reduced outgassing.
• Continuous running in vacuum at high torque and step rates with SMD2 drive.
• Suitable for use below 1 x 10^-10 mB.
• Bakeable to 200°C.
• Suitable for use at 77K.
• Radiation-hard versions to order.
• Selected motors with 30% increased torque available from stock.
• Open construction with all internal spaces ventilated.
• Very low particulate generation due to the absence of sliding metal contacts.

AML UHV Stepper Motors:

C14.1    datasheet

C17.1    datasheet

B23.2    datasheet

DUAL UHV STEPPER MOTOR DRIVE MODEL SMD2

AML's SMD2 Vacuum-Compatible Stepper Motor Drive is designed to match AML motors. Two motors may be driven sequentially either under host computer control, by an internally stored program, from the front panel switches or a hand-held joystick. This drive is also economical for use with compatible air-side motors.

• 1U high full-width, steel-cased instrument for easy rack-mounting.
• Drives 2 UHV stepper motors sequentially.
• Automatic transition between drive modes (step /8, /4, half and full) at user-selected speeds to control resonances.
• Phase currents can be set from 0.1 to 1A in increments of 0.1A.
• Advanced low-power drive techniques for minimum motor temperature rise and outgassing and maximum operating time.
• Holding torque can be controlled independently of dynamic torque under program control, to reduce power.
• Thermocouple amplifiers (type K) for motor temperature indication, protection and control of motor bakeout.
• RS232C interface for host computer control. Drive programs can be developed and run from the computer console (Remote Program Control) or downloaded for stand-alone operation (Internal Program Control).
• Motors may be operated manually with the front panel 'STEP' and 'DIRECTION' switches or with the joystick.  Single-step or multiple-step operation with smooth acceleration to the selected speed.
• 3 user inputs for interaction with program execution, in addition to two "End of travel" inputs for each motor.
• 3 user outputs for switching under program control. 
• Simple control language has many powerful commands which allow control of all aspects of motion or position. Conditional operation, loops and jumps are possible. All commands consist of single characters, followed by  numbers, where appropriate.
• Program development is simplified by improved development software with on-line help and debugging facilities.
• Displays temperature of the motor being driven or baked.
• Supplied with all connectors, mains lead, fuses, joystick, comprehensive manual, interface cable and software for program development on any IBM-compatible PC.
• Simplified connection with MLF12 bakeable lead, feedthrough and connection kit.  ( Not included. )
• Economical with standard stepper motors e.g. with motorised motion feedthroughs.
• Operates on any supply from 100 to 240V, 50/60 Hz without adjustment.