July 2007 INTRODUCING THE NEW 2-PHASE MICROSTEPPING RBK SERIES     NEW! 2-Phase Microstepping Motor and Driver Package   The RBK Series is a DC input microstepping driver and an IP65 rated, 2-phase stepping motor in one package.   The compact, high-performance, microstepping driver features Oriental Motor's proprietary Smooth Drive Function, to easily achieve low-vibration operation.   Wide Voltage Range and High-Current Driver   The RBK Series utilizes a constant current driver with a wide voltage range of 20 to 75 VDC and Max. 4.5 A/phase* effective value (6.3 A/phase peak value).  This enables it to support a wide range of power sources.   * 4.5 A/Phase is factory setting. A desired operating current can be set via selection from among the 55 preset levels (From 0.08 A/Phase to 4.5 A /Phase). No need to use external resistance for setting the current.   The RBK microstepping driver can be used with any of Oriental Motor's 2-Phase stepping motors with Bipolar rated currents up to 4.5 A/phase.  Oriental Motor offers a wide range of compatible step motors: 2.22 in. - NEMA 23 2.36 in. - NEMA 24 3.35 in. - NEMA 34  Please call 1-800-GO-VEXTA (468-3982) for assistance in sizing a motor for your application.   RBK Series     click to enlarge   Microstep Driver and Low Vibration Operation   The microstepping driver electronically divides the basic step angle of the motor (1.8°/step) by up to 128 without the use of a reduction mechanism or other mechanical element.  16 different resolution levels are available.  The available range of resolution settings is 200 (1.8°/step) to 25600 (0.0140625°/step) steps per revolution.  The step angle adjustment is easy and convenient using the built-in switches on the front of the driver. click to enlarge   The RBK also features three advanced functions which further enhance the low-vibration performance.  Smooth Drive Function - The Smooth Drive Function internally executes microstepping within the driver, working independently of the input pulse frequency of your controller. This allows for the same travel and speed as in the full-step mode, without the operator having to change the speed settings of the driver's pulse input.  The Smooth Drive Function enables low-vibration operation available when microstepping with the flick of a switch without needing to upgrade your pulse generator. Third Harmonic Waveform Correction Function - This function corrects any imperfections in the sinusoidal shaped motor drive current waveforms.  Sinusoidal motor current waveforms help to provide improved step angle accuracy and reduced motor vibration. Vibration Suppression Function - This function reduces the amplitude of motor vibration in the medium speed range of the stepping motors.  It reduces the risk of missing steps due to vibrations. Alarm Output for Additional Safety   The driver's alarm functions protect the driver from overheat, overvoltage and overcurrent. When a protective function is triggered, the ALM output turns OFF, blinks the ALARM LED on the driver, and simultaneously shuts off the motor current to stop motor operation.   NEW OFFICE LOCATIONS In an effort to improve and expand our support for you, Oriental Motor has moved and expanded several locations.   Company Headquarters and Western Division Service Center ORIENTAL MOTOR U.S.A. CORP. 1001 Knox Street Torrance, CA 90502 Tel: 310-715-3301 Fax: 310-225-2594   Eastern Division Service Center ORIENTAL MOTOR U.S.A. CORP. 350 Granite Street Building 1 - Unit 1101 Braintree, MA 02184 Tel: 781-848-2426 Fax: 781-848-2617   NEW! North Carolina Sales Office ORIENTAL MOTOR U.S.A. CORP. 133 River Park Rd. Suite B104 Mooresville, NC 28117 Tel: 704-696-1036 Fax: 704-696-1039   MOTION CONTROL QUESTIONS?  ASK AN ORIENTAL MOTOR ENGINEER Oriental Motor's Engineering Team is just a click away.  Send your motion control questions to Oriental Motor's engineers and we'll publish their response in an upcoming issue of New Motion. Q:  What is loss of synchronization in step motors?   A: Stepping motors are synchronized by pulses.  They can lose their synchronization when speed changes rapidly or an overload occurs.  Loss of synchronization is the term for losing synchronization with the input pulse.  If a motor is correctly selected and normally operated it will not suffer a sudden loss of synchronization.    For more information on properly sizing and selecting a motor please call our Technical Support staff at 1-800GO-VEXTA (468-3982).   Each issue, our Engineering Team will answer our reader's motion control questions.  From how to use a stepping motor to proper motor sizing techniques and specific applications, ask an OM engineer and get your answer directly from the source.  Our engineers are dedicated to continuous research and development in motion control technology.  E-mail your motion control question to newsletter(Please be sure to include your e-mail address and contact information so our Engineering Team can follow up on your question.) Visit our "Frequently Asked Question (FAQ)" section online. Oriental Motor also offers 1-800 Technical Support.  Our Technical Support Team is qualified to answer a wide variety of questions.  Call toll free 1-800-GO-VEXTA (468-3982) to speak with an Oriental Motor associate or e-mail techsupport