Stepping Motion Control Technology Overview

For some low-power applications, simple internal control, and micro-motor drives, high-density torque stepper motor servo system constitutes a viable option. Jin is the only circumstances in the open-loop operation, Motor run capacitor without position feedback movement control methods. This makes stepper motor servo motor system than the system much simpler, lower costs also added a stepper motor appeal. Coupled with the other continuously improve design, such as hardware miniaturization and high-density torque, making stepper system in many less demanding speed and precision positioning applications campaign maintained strong competitiveness. Based on the stepper motor system can be achieved 0.75 kilowatt (1 hp) of power, but the majority of applications are in the lower output power running. Concerned about a large number of manufacturers in this market. Baldor Electric NextMovee100 real-time motion controller can be carried out for the 16-axis interpolation, and can manage even the most Ethernet Powerlink received the 240 axis. These axis handling Motor run capacitor simple point-to-point movement, and guide series, to move the control to And the step (servo) Sports related to the torque demand. Size and function of the problem ParkerHannifin companies that are small and simple step system is notable advantages, cheap is stepping servo system and another sports competition advantage. "Stepping system without increasing the cost of any circumstances that can be done is very small," product manager MarcFeyh said, "there are some mini servo system, but they are not so small, prices also more expensive, and the need for more parts be miniaturized. "simple open-loop operation is its second advantage. However, in terms of price / performance on the basis of competition has become increasingly difficult. "Reasonable price" to continue to improve the size and maintain performance. Parker pointed out that this trend in the high-end and expensive stepper system is differentiated, and it could not compete with low-cost servo system. To meet the size and cost requirements, Parke electromechanical automation sector is the introduction of stepper drive / controller, it is a micro-stepper modules provide programmable logic controller and integrated input / output ports. Prefabricated pieces of palm-sized (1.1 × 1.5 × 4 inch) installed in the Promech Parker linear series on the drive, a micro-stepper motor systems. Park rotary stepper rate to NEMA, 11, 14 and 17, respectively, in a square cross-section of the motor into each of the size of 1.1,1.4,1.70 inches. According ShinanoKenshiCorp. (SKC), the study of small motors, high-density torque and low noise / vibration stepper motion control is to ensure that the relevant improvements. SKC made improvements in these areas, should control (lower) prices stepper motor. It is said that new or redesigned laminated rotor and the stator has optimized the internal space and NEMA17 and 13 stepper system structure. Stepping redesigned operating system torque than the previous model SKC higher than 20% to 30%, using the same input power prices and cost-effective permanent magnet materials, RexBergsma, SKC (US), chairman explained that the improvement is To add additional permanent magnet rotor material. Since the space is fixed, mobile needs of the location of a stator, which is around the local resistance. Laminated redesign also improved SKC new STP-430 stepper motor rotor and stator tooth. The results form a stronger, more focused magnetic field, to reduce the noise (see figure) and the "set-up time (damping), a model from the previous nearly twice as fast," Bergsma. Said. Not only is the revolving In addition to the traditional rotary stepper motors, linear stepper motor systems. BaldorElectric company said application and design engineers linear movement of these products more and more interested. It quoted rotary motor (servo) the advantages, such as reducing parts and virtually no wear or maintenance, and ease of use of machinery. "Linear stepper motor is very suitable for applications in light load circumstances, provide an excellent open-loop performance, higher acceleration and higher than the rotation speed," product manager JohnMazurkiewicz Baldor said. Baldor production of a wide range of linear stepper motor, including uniaxial, biaxial (X, Y axis) devices, multi-axis gantry, and custom design. The company's NextMove series programmable controller provide appropriate output power to run linear and rotary stepper motor (and servo motor). Real-time Motion NextMove controller is the latest product (see photo). OrientalMotor said, the new stepper motor drive system and the development of "a higher performance parameters and the process of integrating the various components." The process composed by several trends: �high-density Torque: through the use of higher energy products (strength) of the Nd-Fe-B (Nd-Fe-B) of rare earth permanent magnetic materials periodically re-design and structural changes, such as larger rotor diameter, has been improve performance of the motor torque. OM benefited from the high torque of products including PV and PK-HT series hybrid stepping motor (2-phase) and CRK series, five-phase motor. �Step improve accuracy and transmission smooth: an advanced micro-step method is by controlling the current to higher precision stepper. For example, the Oriental RK series, five of fretting drive with a special ASIC, proprietary software, and current sensors in a wide speed range, control current. Current sensors and control software further ensure the "smooth drive function," in the operation of the vibration and noise suppression, independent of the input frequency drives, OrientalMotorUSA Engineering Manager NickJohantgen explained. Lower natural vibration of the five two-phase stepper motor and stepper motor is the opposite, which would also help the situation. "Smooth drive," PK and CRK products, such as the five-phase stepper system control. �more micro-Size: "Small is open loop stepper motor and its associated drive the development of the overall trend," Johantgen said, "portable medical equipment and industrial equipment in many applications require the use of smaller motors." To meet this request, OM has been developed in the 8 and 11 inCRK five-phase motors and 11 and 14 in (1.4in./35mm) PK two-phase stepper motor. CRK new compact micro-stepping drive size of a mere 0.98 x1.77x2.56in, and the largest in each phase can be controlled 1.4 ACRK motor.