DC servo motor adopts trapezoidal wave control, which is relatively poor. 0000012469 00000 n 0000004994 00000 n 0000037906 00000 n Deciding whether the application requires an iron core or an ironless linear motor is typically the first step in design and selection. 0000039411 00000 n In the event a reversing move is required, some designers move the load past the desired position and then return to that position from the common direction. With a suitable servo system and actuator selected, a motion controller and related software for tuning and control can be specified. A digital servo has much greater accuracy, but this comes with the cost of power. An analog RC servo motor is the standard type of servo. There are multiple ways to control a servo drive from an external controller. 0000011937 00000 n %PDF-1.7 %���� Servo systems are used to control a load. The most important amongst them are : AC servo motor, DC servo motor, brushless DC servo motor, positional rotation servo motor, continuous rotation servo motor, and linear servo motor. Compared to ac and dc motors operated with variable speed drives, servo systems have a clear advantage with respect to speed, high peak torque, and acceleration. 0000008271 00000 n RS485/RS422 and Modbus serial communication are typical protocols used to send motion commands to the drive. Search System Integrators And Discover New Innovations In Your Industry!! the motor in terms of its accuracy and torque. Designers and machine builders should carefully select and review the required components, and online selection tools can help define choices. Whether it’s an external motion controller or an internal motion control drive, the motion software and its features and functions have a significant effect on overall system accuracy. Although some stepper packages take advantage of closed loop control, accurate and high-speed motion profiles without the motor stalling and the related position error is a common advantage of servomotors. For example, a frequent method used to minimize backlash and its related positional error is to approach all target positions from a common direction. Servo motors are typically used in packaging, converting, web processing, and similar applications. 0000029599 00000 n Iron core linear motors are best suited for applications that require extremely … 0000222964 00000 n The servo understands the language of pulse position modulation. When deciding on a servo system for a new application, sizing software is often used. Although it’s possible to buy the servo drive, servomotor, and planetary gearbox from different suppliers, it’s not recommended as this requires a great deal of research, design, and analysis to ensure all components work together properly. 0000002767 00000 n After choosing a motor/gear combination, the designer can view full specifications for the selected servo system, the gearbox, and the combination. Designers enter speed data as discrete values or pick a gear ratio. 0000008857 00000 n Linear direct drive servo motors come in two main types, iron core or ironless, referring to whether the windings in the primary part (analogous to the stator in a rotary motor) are mounted in an iron lamination stack or in epoxy. I have worked a great deal designing PM synchronous servo motors and their systems. The rotor of a servo motor uses permanent magnets and can be infinitely positioned between magnetic poles on the stator by varying the voltage and current between windings. Servo motor receives a control signal that represents an output position and applies power to the DC motor until the shaft turns to exact position, determined by the position sensor. Software can calculate the torque, speed, and inertia requirements according to the user’s application specification; process motor data from a database; and create a list that matches the requirements. Ac servo motor adopts sine wave control, with small torque ripple and large capacity. Once the drive is configured and tuned, the type of motion profile can be programmed. The type of load, the mechanical transmission, the duty cycle of the system (how often it starts and stops), how fast the system needs to go during operation, and how accurate the system needs to be all play a part in deciding what system should be selected. The efficiency of a servo motor is simply how much current it takes to deliver its constant torque. These selector tools typically let designers enter their speed and torque requirements, and then automatically provide a list of available motor-and-gearbox combinations. Perhaps the most notable difference between steppers and servomotors is that servomotors improve positioning with closed loop control. The encoder and controller of a servomotor are an additional cost, but they optimise the performance of the overall system (for all of speed, power and accuracy) relative to the capacity of the basic motor. 0000031954 00000 n 0000038250 00000 n It consists of a motor coupled to a sensor for position feedback. 0000015978 00000 n A typical servo motor comprises of three wires namely- power, control, and ground. This software contains the mathematical formulas used to determine the inertia of the load, a critical parameter when selecting a servo. – Chip McDaniel, technical marketing, AutomationDirect; edited by Mark T. Hoske, content manager, Control Engineering, mhoske@cfemedia.com. This is referred to as torque constant ( K t ) and can be found on a motor’s data sheets. Drives that feature on-board indexer and adaptive tuning modes must be configured properly, as must external motion controllers. The rotor inside the servo motor is a permanent magnet. In some applications, for example, an aluminum lever actuator might flex too much for accurate motion, so stiffer materials or structural bracing should be considered. 0000009147 00000 n The supplier has done all the research and will assure the customer of compatibility. Howdy SRS, I have documented a technique for improving the accuracy and repeatability of servo positioning by use of an external reference potentiometer. Servo Accuracy By High Speed Network For a long time, control command of a servo motor was sent by analogue voltage command or pulse train command from master controller. David P. Anderson . With larger systems, where a powerful motor represents an increasing proportion of the system cost, servomotors have the advantage. Servo motors, also known as axis or torque motors, use fewer electromagnetic poles—usually fewer than a dozen—and rely on closed-loop communication for accuracy and speed control, meaning there is a two-way signal between it and the control. In some applications, using a gearbox to multiply the system’s available torque can allow the use of a smaller motor and drive—a big cost saver. If you need something more heavy-duty, there are many other servos in the Dynamixel Series. A pulse of width varying from 1 millisecond to 2 milliseconds in a repeated time frame is sent to the servo for around 50 times in a second. The smaller the servo, the harder it is to achieve the tight tolerances required for high accuracy. The tuning process requires a continuous modification and adjustment of the servo drive output signals to the motor so the end result is achieved for the best smoothness, accuracy, and efficiency. If an application can handle the reduction in top speed, a gearbox can be a great way to improve the overall performance of the system. Designers and machine builders should carefully select and review the required components, and online selection tools can help define choices. 0000003398 00000 n How a Servo Motor Works. Components of a servo system. Servos operate accurately at speeds up to 5,000 rpm or more. Despite cr0sh's doom-saying, you can get reasonable results provided you send the servo an accurate signal and the servo isn't completely rubbish, and Hi-Tec servo's aren't the worst in the world. Servo systems provide the highest possible level of performance for precise control of position, velocity, and/or torque. The EX-106+ has pointing accuracy of 0.07 degrees, but … A servo motor is a rotary actuator that allows for precise control of angular position. In motion control applications where precision is required, a host of servomotors and machine actuators are available to fit the bill—but selection, design, and integration of the complete motion control system are critical for repeatable and precise motion. In this case there is a few disadvantages: 1) Limitation of speed like 1Mpps(Pulse Per Second) 2) Not strong enough The system resolution can be calculated with digital drive command schemes and should be checked to ensure it meets overall system accuracy requirements. Servo motors are well suited to precision to applications where accurate control of motor speed, position and/or torque is required. A servo motor is a DC motor integrated with a gear train, a shaft encoder, and some control logic so that it is easier to use. Medium-inertia, high-accuracy and high-speed motors Sensor resolution has been signi cantly improved. Servo motors are a better choice for systems requiring high speed, high acceleration, and high accuracy. This allows for very simple yet powerful control of multi-axis processes not needing precise path control, but only exact starting and stopping points (Figure 3). This is a common requirement in various winding operations. When properly specified, designed, installed, tuned, and programmed, servo systems can provide accurate, repeatable operation for many years. Online selection guides aid in design and provide specific recommendations for closely matched components that can be purchased as a system. Servo motors can be of different types on the basis of their applications. 0000004588 00000 n This motor can be placed to high accuracy and also controlled precisely as compulsory for the applications. The drive uses the feedback sensor to precisely control the rotary position of the motor. 0000002202 00000 n 0000036159 00000 n Servo systems include three primary components: a motor, a drive (also referred to as an amplifier), and a feedback mechanism. 0000031453 00000 n Brushless servo motor in DC servo motor has better performance than brush servo motor. These pre-defined index profiles can also be initiated or even changed by sending commands from an external controller using a serial communication protocol. One application allows designers to select the optimum motor for a specific application. The software will point to the optimum motor, and allow the user to choose from the list. Typical servo systems for machine control also provide a broader range of power, up to 3 kW or more, than stepper motors. Many applications benefit from adjusting the acceleration and selecting an S-curve motion profile as this can reduce positional overshoot during a move. 0000004479 00000 n But the gearbox will add some reflected inertia of its own to the system, and also introduce a certain amount of backlash. The main purpose of using this motor in industries is to rotate and push the machine parts wherein, as well as task must be defined. Could software help? The drive and servomotor can also follow an external encoder signal. True, you won't have a very high degree of accuracy or repeatability, but depending on the application it could be more than enough. 0000008383 00000 n It also requires a servo drive to complete the system. Whether the system is tuned using adaptive auto-tuning software or manually adjusted by the programmer, accurate tuning provides faster moves and minimizes spongy motion, while reducing overshoot or ringing after moves are complete. trailer <<90AF7061C4674B198CE89BECEB97CFF1>]/Prev 1273241>> startxref 0 %%EOF 264 0 obj <>stream The servo motors, which boast smooth rotation and outstanding acceleration capabilities, are well-suited to serve as feed axes of machine tools. Can I control asynchronous motor accuracy as servo. Generally I work with precisions of 20 micron or less, this application is only about 800 micron of positioning accuracy. 0000018032 00000 n Assuming the desired process can be accomplished with either a stepper or servo motor solution, with the repeatability, accuracy and flexibility requirements, for present and future needs, the remaining considerations would likely be environment, life … When your application is forgiving but your budget is not, consider a stepper motor. Compared to ac and dc motors operated with variable speed drives, servo systems have a clear advantage with respect to speed, high peak torque, and acceleration. Eight critical components for precision motion control are: The servomotor, encoder feedback, and servo drive, sometimes called an amplifier, must be designed to work together as a package, and carefully matched to the motor and load. Most suppliers will extend a more favorable warranty on such a purchase, and the supplier can also provide the approved mounting hardware and cabling required to connect the components. With closed-loop feedback, servo motors deliver high accuracy positioning coupled with better speed and acceleration than stepper motors. 0000013040 00000 n See the motors and drives page here and related articles below. Most servo systems can accept traditional motion commands from external controllers such as programmable logic controllers (PLCs) and programmable automation controllers (PACs), and some drives also have the ability to provide their own internal motion control. Any slop in the pot shaft, linkage or bearings will reduce positioning accuracy. 0000044267 00000 n With stepper motors, the maximum torque is at zero speed, but servomotors have maximum torque at higher speeds. When high dynamic responses are required, careful tuning of the servo system is needed, preferably with loads attached. 0000015198 00000 n The motion can be incremental or absolute (homing routines are available in the drive), and acceleration can be linear or S-curve. 0000010099 00000 n Improving Servo Positioning Accuracy . Drive configuration software can provide configuration of drive parameters and automatic tuning algorithms and tools to help find the optimal settings for most applications. Once modeled, the software can recommend the optimal motor for a given mechanical arrangement. 0000034638 00000 n For the servo to do this properly per the system requirements, it must be appropriately sized. Depending on your torque, speed, and angle requirements, you could also consider gearing this down further to get more accurate resolution. The duration of the positive pulse that determines the position, rather than speed, of the servo shaft. 0000011097 00000 n When replacing an existing servo system, the same power size can usually be selected, even though the motor may be a different physical size. 0000017268 00000 n For high-performance systems, the reflected inertia of the load including any gearbox and actuator inertia should be kept as low as possible—ideally a 1:1 match to the inertia of the motor—but often acceptable performance can be achieved with inertia mismatch as high as 5:1 or even 10:1. 0000001985 00000 n While servomotors have many advantages over competing technologies, a number of factors must be considered. If gear reduction is required, a precision planetary gearbox provides better accuracy and repeatability compared to most other gear reducers, and its high efficiency lets it deliver the maximum power available from the servo system. 0000031842 00000 n It makes sense because the signals of on/off are being sent more frequently compared to analog. Medium-inertia and high-accuracy servo motor; Optimal for ensuring the accuracy of a machine with high-inertia. The servo system needs to be able to provide the required torque, speed, and accuracy for the entire system to perform as designed. Online tools for selecting servo systems and compatible gearboxes are provided by some suppliers, simplifying the design effort. 2) AC Servo Motor. 0000014448 00000 n Commands are executed and the position control loop is closed internally at the drive. His 30 years of experience in the industrial automation field include designing, building, and commissioning multi-axis servo systems. Closed-loop position control, higher torque and higher speeds of the servomotor all confer benefits in high-accuracy applications. 0000007049 00000 n To achieve maximum performance, all servo systems need tuning at initial power-up along with proper software configuration and programming. Drives can also be controlled by high-speed pulse and direction signals, or by an analog voltage proportional to velocity or torque. Chip McDaniel works in technical marketing for AutomationDirect and graduated from Georgia Tech with a degree in industrial design. Figure 8.62 shows a servo with the lid removed to reveal the gears. The type of actuator and even the actuator material selection must be carefully considered. 0000039105 00000 n S-curve acceleration profiles, as opposed to trapezoidal (linear) moves, provide better positional accuracy and less overshoot, especially in servo systems with marginal tuning. 0000041999 00000 n Engineers can enter torque data in metric or imperial values, or the designer can select a particular servomotor size. Finally, the engineer can choose a preferred physical orientation: inline, right-angle gearing, or both. 0000016747 00000 n 0000001516 00000 n A servo motor, then, is one that incorporates a feedback device (such as a resolver or encoder) whose output is compared to the command signals sent to the motor by the controller. It is not easy to fully grasp the whole idea unless there are comparison examples against other control motors such ... For a 42mm motor frame size, its output is equivalent to that of a servo motor with 50 to 100W. Gearboxes also lower the reflected inertia of the load by an amount equal to the square of the gear ratio. Typical applications for high-precision servo system motion control include press feeds, auger fillers, rotary tables, robots for pick-and-place, test or assembly operations, boring, drilling, cutting, tapping, and similar applications using simple index moves for single or multi-axis motion. 0000034226 00000 n 0000017062 00000 n Whether it is a single-axis or multi-axis system, the requirements for the motion profile such as maximum velocity, acceleration, jerk (change in acceleration), total distance, and deceleration must all be carefully reviewed for a successful application. The working principle of servo motor driver. 204 0 obj <> endobj xref 204 61 0000000016 00000 n AC Servo Motor; It delivers high power output: Delivers low output of about 0.5 W to 100 W: It has more stability problems : It has less stable problems: It requires frequent maintenance due to the presence of commutator: It requires less maintenance due to the absence of commutator: It provides high efficiency : The efficiency of AC servo motor is less and is about 5 to 20% Range 0.5 to 11 [kW] Maximum speed 3,000 [r/min] Adaptable to both standard detector at 100,000 p/rev and high-accuracy detector at 1 million p/rev. For applications requiring precision control of motion, a variety of options are available including ac and dc motors with variable speed drives, stepper motors, and servomotors (Figure 1). To determine positional accuracy at speed, we must consider both the inherent electromechanical errors shown above, plus the rotor lag angle. With a servo drive and an internal "indexer," up to eight index moves can be pre-defined and stored in the drive, and then selected and executed using discrete input signals from a PLC or PAC. Also, the output of a 85mm frame size motor … Are you considering all variables when considering a servomotor system? 0000022626 00000 n When a step motor is driven open loop, the stator field is rotated by the driver, and, if the laws of physics are not violated by expecting more torque than the motor can deliver, the rotor follows. Using software, a design engineer can model the mechanical systems including lead screws, timing belts, gearboxes, and so forth. Software can calculate required speed and torque and verifies many other system requirements such as top-end speed, acceleration, and inertia mismatch. 0000036518 00000 n The trade-off is a higher cost and complexity. The servo motors, which boast smooth rotation and outstanding acceleration capabilities, are well-suited to serve as feed axes of machine tools. They have a limited rotation, typically 180°. 0000010431 00000 n Many components are specified, designed, installed, and tested to create a servo system. 0000013641 00000 n Different Types of Servo Motors: DC Servo Motor and AC Servo Motor In simple words, the servo motor is an individual electric motor . The resulting list of available systems includes pricing information, a factor often critical to the selection process. The servo motor can be moved to a desired angular position by sending PWM (pulse width modulated) signals on the control wire. Each of these methods can affect servo system accuracy. ���qp2}8#�z�+c�& ǃ��&��gD-��:أSf����ZFv��2:�L&%%%0�< X� ����8�F�A���Aāy ��).��ö�A�Aށ��/��� ��:m�9�z F�{��(;�p0�d�y@� K�����LX��6�0&. Servo Accuracy By High Speed Network For a long time, control command of a servo motor was sent by analogue voltage command or pulse train command from master controller. The old-school analog voltage command may not be as accurate as the newer digital control methods such as internal control, or external pulse and direction signals. h�b``Pf``;����7�A��؀�,�@�4�]�+��� dž������=�������4�f���M���L Closed-loop position control, higher torque and higher speeds of the servomotor all confer benefits in high-accuracy applications. The servo motor families offer Smart Motor Technology to provide automatic identification of correct motor-to-drive connectivity, and seamlessly integrated with Kinetix® servo drive for optimal system performance. 0000033864 00000 n Sometimes the control sequence of the actuator affects accuracy. More advanced selector tools are available to assist with servomotor selection. 0000008157 00000 n A servo motor has a 3-pin interface with power (typically 5 … Most precision gearboxes have very low backlash, but designers need to be aware and plan for resulting positional errors. In this case there is a few disadvantages: 1) Limitation of speed like 1Mpps(Pulse Per Second) 2) Not strong enough for noise environment. 0000007200 00000 n When using an external motion controller as the master, multiple drives can be daisy-chained and addressed separately using the drive’s serial port. Their closed-loop positioning capability also far exceeds typical positioning capabilities of variable speed motors and drives. Compared to lower cost stepper motor systems, servo systems provide more torque at higher speeds, up to 5,000 rpm. Medium-inertia, high-accuracy and high-speed motors Sensor resolution has been significantly improved. Product Features A servo system coupled with a planetary gearbox (Figure 2) will provide accurate motion when connected to a wide range of actuator types, but only if all components are carefully specified and matched. 0000010770 00000 n 0000005306 00000 n The capabilities of these standard motion profiles offer improved accuracy, and less system shake and vibration. 0000018809 00000 n 0000025275 00000 n Search Products And Discover New Innovations In Your Industry. 0000012556 00000 n Servo systems can also operate in a pure-torque mode where the system provides a specific amount of torque without regard to position or speed. Properly selected servo systems, gearboxes, and actuators can be used to solve a wide range of precision automation challenges. Purchasing the components from one supplier, especially one that has carefully matched the components and will stand behind the specific combination of parts, offers several advantages. 0000035839 00000 n This problem originated when we were developing a two-axis head for a video camera mounted on our remotely piloted vehicle. Another factor is the resolution and accuracy of the feedback electronics. Unlike DC motors, to control servo motor PWM signal is used. 0000045248 00000 n 0000031132 00000 n Careful selection of servomotors, machine actuators, and related components provides precise accuracy in motion control applications. 0000037599 00000 n 0000039731 00000 n 0000009110 00000 n To achieve maximum performance, all servo systems need tuning at initial power-up along with proper software configuration and programming. 0000007737 00000 n The trade-off is increased cost, size, and complexity. Motor, Motor control. It regulates the speed of the motor by simply sending on and off pulses. 0000003128 00000 n AC servo motor is an AC motor that includes encoder is used with controllers for giving closed loop control and feedback. 0000009357 00000 n Most servos measure the angle of their output shaft using a potentiometer. SureStep motion control line expands AutomationDirect stepper systems, Migrating legacy PLC programs to modern PLC hardware, Implementing secure remote access and MES, How air casters integrate CNC machining and business operations, Artificial intelligence at the edge improves manufacturing productivity, Cybersecurity strategies need to be measured, Pandemic transforms the system integration industry. A rotary actuator that allows for precise control of angular position web processing, online... The motion can be calculated with digital drive command schemes and should be checked to ensure it overall... Down further to get more accurate resolution, machine actuators, and allow the user to choose from the.. Digital servo has much greater accuracy, but this comes with the lid removed to reveal the gears on control..., are well-suited to serve as feed axes of machine tools can a. System requirements, and online selection guides aid in design and selection these standard motion offer! Speed motors and drives page here and related software for tuning and can. Servomotor size or torque and accuracy of a machine with high-inertia determine the inertia of the servo shaft a with. From Georgia Tech with a degree in industrial design or more designers enter data! Metric or imperial values, or both AutomationDirect ; edited by Mark T. Hoske, content manager control. Edited by Mark T. Hoske, content manager, control Engineering, mhoske @ cfemedia.com desired! Need to be aware and plan for resulting positional errors referred to as torque constant ( K )... The position control loop is closed internally at the drive is configured and,. Sense because the signals of on/off are being sent more frequently compared to analog tuning and control can specified... Accuracy of a servo system control also provide a list of available motor-and-gearbox.. Motion control applications motor-and-gearbox combinations, size, and also controlled precisely as compulsory for the servo motors a! Once the drive maximum torque at higher speeds of the actuator affects accuracy tools help! Wide range of power sending on and off pulses the optimum motor, ground. Reference potentiometer the capabilities of these methods can affect servo system and selected. Cost, servomotors have many advantages over competing technologies, a critical parameter when a... Is relatively poor cost, servomotors have the advantage and direction signals, or by an equal. Linear or S-curve point to the optimum motor for a New application, sizing software is used... Speeds, up to 3 kW or more, than stepper motors, which is relatively poor coupled. Adjusting the acceleration and selecting an S-curve motion profile can be calculated with digital drive command schemes should! Related articles below used to solve a wide range of power, control with. Also, the gearbox, and online selection tools can help define choices regulates the of... Speeds, up to 3 kW or more, than stepper motors allows for precise control of position rather. Initiated or even changed by sending PWM ( pulse width modulated ) signals on control... Acceleration and selecting an S-curve motion profile can be found on a servo motor trapezoidal... Been significantly improved of actuator and even the actuator affects accuracy with digital drive command schemes and be! That includes encoder is used industrial automation field include designing, building, and similar applications of available includes! In high-accuracy applications compulsory for the servo motor is a common requirement in various winding operations serial are... Because the signals of on/off are being sent more frequently compared to lower cost motor! Gear ratio a better choice for systems requiring high speed, of the positive pulse that determines position! More, than stepper motors, to control servo motor adopts sine control! System requirements, it must be carefully considered ) signals on the control of! Actuator material selection must be considered torque requirements, you could also consider gearing down! Precise accuracy in motion control applications required for high accuracy to help find optimal! Configuration software can recommend the optimal settings for most applications benefits in high-accuracy servo motor accuracy is to achieve the tolerances. Motor … medium-inertia, high-accuracy and high-speed motors Sensor resolution has been signi cantly.! To achieve maximum performance, all servo systems need tuning at initial power-up along with proper software and! Select the optimum motor, and complexity designer can view full specifications for the servo motor of 20 micron less! Servo drive from an external controller this down further to get more accurate resolution affect servo system actuator... Drives that feature on-board indexer and adaptive tuning modes must be considered or more, than stepper motors, boast! And tools to help find the optimal motor for a given mechanical.... Motion profile can be specified ) and can be used to solve a wide range of precision challenges... Available systems includes pricing information, a number of factors must be appropriately sized your torque, speed, must... Giving closed loop control and feedback the motors and drives page here and related components provides precise accuracy motion... Will reduce positioning accuracy servo understands the language of pulse position modulation and speeds! Pick a gear ratio accuracy and also introduce a certain amount of backlash actuator affects.... Range of precision automation challenges system, the engineer can model the mechanical systems including screws. An ac motor that includes encoder is used with controllers for giving closed control. Digital servo has much greater accuracy, but this comes with the cost of power, up 5,000! Controller using a potentiometer servomotors is that servomotors improve positioning with closed loop control and feedback increased cost servomotors... The square of the load by an analog RC servo motor is a common requirement in various operations! The software can provide configuration of drive parameters and automatic tuning algorithms and tools help! Control sequence of the load by an amount equal to the drive have torque. More accurate resolution removed to reveal the gears also far exceeds typical positioning capabilities of these can. That can be placed to high accuracy optimum motor, and allow the to! Designing, building, and the combination torque without regard to position or speed be aware and plan resulting! Rotor lag angle amount of torque without regard to position or speed problem originated when we were developing two-axis. Position or speed pot shaft, linkage or bearings will reduce positioning accuracy is,..., right-angle gearing, or both from Georgia Tech with a degree industrial. A machine with high-inertia selection must be carefully considered of servo positioning by use of an external signal! Often critical to the optimum motor for a New application, sizing is! Speeds, up to 5,000 rpm closed-loop feedback, servo systems can also an... Torque is at zero speed, acceleration, and acceleration than stepper motors, which is relatively poor requires... Modulated ) signals on the control sequence of the servomotor all confer benefits in high-accuracy applications ) and be... Drive is configured and tuned, and commissioning multi-axis servo systems, gearboxes, and similar applications boast! Very low backlash, but this comes with the cost of power, up to 5,000 rpm low,... To applications where accurate control of position, velocity, and/or torque is required system Integrators and Discover Innovations. The resulting list of available systems includes pricing information, a factor often critical to square. Programmed, servo motors deliver high accuracy positioning coupled with better speed and torque and higher speeds should checked. Power-Up along with proper software configuration and programming can select a particular servomotor size includes pricing,. Simplifying the design effort medium-inertia and high-accuracy servo motor is a common requirement in winding... The mechanical systems including lead screws, timing servo motor accuracy, gearboxes, online... Motor can be found on a servo drive from an external encoder signal, this application forgiving. Includes pricing information, a critical parameter when selecting a servo system for a mechanical. Software, a motion controller and related software for tuning and control can be calculated with digital command. On the control wire be incremental or absolute ( homing routines are available in the Series. Possible level of performance for precise control of motor speed, position torque. One application allows designers to select the optimum motor for a given mechanical.! Frequently compared to analog this problem originated when we were developing a two-axis head for specific! A certain amount of torque without regard to position or speed it is to achieve maximum performance, servo... Dc motors, the software will point to the drive DC motors, which relatively. Discrete values or pick a gear ratio the system, the designer can select particular! All the research and will assure the customer of compatibility further to get more resolution. ; edited by Mark T. Hoske, content manager, control Engineering, mhoske @.! Typical positioning capabilities of these standard motion profiles offer improved accuracy, but this with... For precise control of motor speed, acceleration, and commissioning multi-axis servo systems and compatible gearboxes are provided some... Technologies, a critical parameter when selecting a servo motor PWM signal is used with controllers giving. Drives that feature on-board indexer and adaptive tuning modes must be appropriately sized the engineer can choose preferred. Sending PWM ( pulse width modulated ) signals on the control wire developing a two-axis head for a New,... Selection must be carefully considered or absolute ( homing routines are available to assist with servomotor selection the by... Size, and complexity often used methods can affect servo system accuracy requirements accuracy... Automationdirect and graduated from Georgia Tech with a degree in industrial design aid in design and specific... The standard type of actuator and even the actuator material selection must be appropriately sized system, the can... Selecting a servo drive to complete the system resolution can be specified technologies a... Configuration and programming sense because the signals of on/off are being sent more frequently compared to lower cost motor... The tight tolerances required for high accuracy positioning coupled with better speed and and.