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Microstepping is a method of stepper motor control that allows the rotor to be positioned
at places other than the 1.8° and 0.9° positions provided by the full-step and halfstep
methods. Microstepping occurs between these two angular points in the
rotation of the rotor. These stepper motors are suitable for 1/10 and 1/125 microstep
increments. A benefit of microstepping is that it reduces the amplitude of the
resonance which occurs when the motor is operated at its natural frequency or
subharmonics of that frequency.
In-vacuum stepper motors are ideally suited for the precision movement of delicate
specimens such as silicon wafers in ultrahigh vacuum. The use of in-vacuum
stepper motors results in considerable savings in mechanical complexity with
resultant gains such as cost reduction, improved reliability and decreased backlash.
In some cases the use of in-vacuum motors can mean the complete elimination of edge
welded bellows. The particulate generation of these stepper motors is
minimized by the total absence of metal to metal sliding surfaces. This and their low outgassing
characteristics make these motors especially suitable for sensitive semiconductor
handling applications. Other applications for which these motors have been employed include
precision in-vacuum UHV manipulators, monochromator mechanisms for synchrotrons, ion beam lithography and
sample transport in UHV.
All motor controls are sold separately and are not included in the motorization option
Alternating current (AC) motors do not require motor controls since they are
designed to be wired directly into an alternating current wall circuit.
DCM-SC-90 controllers are designed for use with 90 VDC motorized instruments. This
controller provides bidirectional motor control in continuous and jog
modes. Motor speed is adjustable from 0 to 10 rpm via voltage regulation. Feedback circuitry uses
the motor’s “Back-EMF” to provide a flat torque-speed curve. Additional
features include transient and surge protection, line voltage compensation, soft start, discrete
silicon-controlled rectifiers and diodes for higher amperage output and better heat
dissipation. Controller is wired for 115VAC input and is provided with a 2 conductor
cable for direct connection to MDC 90V motorized components.
MDC now offers new 4.3” touchscreen controllers that are compatible with all standard stepper motor options for rotary,linear and XYZ stages. The controller package includes everything you need to drive an MDC motorized feedthrough. All cables and connections are pre-terminated to work together for a no fuss simple installation. Controllers are available in single axis or three axis versions. They can be programmed to deliver output commands directly to the motor or can be connected to a computer via RS485 with options for RS232, USB, Ethernet or DeviceNet™ connections. These controllers are the ideal solution for your precision motion applications.
To learn more about these options, email inquiries to firstname.lastname@example.org or contact MDC Technical Sales team by phone at 800-443-8817.
Direct current stepper motors
MDC Stepper Motor Controller and Indexer are obsolete and no
MDC Vacuum Products,
LLC is an ISO 9001:2008
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