Stepper motors are known for several advantages. This low cost and low maintenance device can produce high torques even during startup phase or at low speed. A typical step motor is able to operate in open loop control systems and in most types of environments, and is less likely to slip or stall. Its relatively simple construction and ruggedness makes maintenance cheap and easy, too. For applications where cost is a concern, a DC stepper motor can be used for motion control.
Stepper Motors Defined
Stepper motors are electromechanical devices that generate mechanical movements by converting electrical pulses. Digital pulses make them work instead of continuously applied voltage. Hence, unlike typical continuously rotating electric motors, stepper motors step or rotate in fixed angular increments. They are typically used for applications where costs are a major factor and position control is crucial, like in linear actuators, mirror mounts, goniometers, and rotation stages, as well as in commercial products like slot machines, plotters, printers, camera lenses, 3D printers, and CNC machines. A design that consists of a stepper motor, driver, and controller system ensures that the stepper motor will abide by digital instructions.
Stepper motors typically consist of a shaft, stator and rotor laminations, copper and lead wires, bearings, magnets, washers, and end and front covers. The shaft is usually made of stainless steel metal, and the rotor and stator laminations are made of silicon steel, which is known for superb electrical resistivity to lower core loss. Magnets are supplied in different types to suit various applications, but they are usually Nd-Fe-B bonded, ferrite sintered, or ferrite plastic magnets.
There are three basic types of stepper motors: permanent magnet, variable reluctance, and hybrid NEMA stepper motors. A variable reluctance stepper motor has multiple soft iron rotors and a wound stator, large step angles, and provides no detent torque. A permanent magnet stepper motor has a rotor that is made up of a permanent magnet. Hybrid NEMA stepper motors are a combination of VR and PM stepper motors and can be applied to a wider range of applications, including CNC equipment. These are the basic reasons why stepper motor are preferred over other traditional motors.
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NEMA 42 stepper motor is the largest stepper motor of the stepper motor family. This is known to be the finest type of stepper motor. It has the unique features of both, permanent and variable reluctance motor. It is an electronically driven motor, and it is used in the robotics industry and many other industries. The stepper motor is mainly used in the applications where precise and efficient motion control is required whether the motion is linear or rotational. In case of rotational motion, when it receives digital pulses in an accurate sequence it allows the shaft of the stepper motor to rotate in discrete step increments.
Industrial Applications of NEMA 42 Stepper Motor:
NEMA 42 stepper motor is widely used in the field of robotics as it provides high torque and has the quality to work for precise control. Nowadays as the world is getting dependable on the technology robotics industry has got a great chance to grow. The growing field of robotics is partially dependable of NEMA 42 stepper motor for their growth, as it is the best electrical motor to be used for the robotics applications.
CNC (Computer Numeric Control) industries are those who manufactures CNC equipment like CNC routers, CNC milling machine, and various other CNC products. These equipment are computer controlled devices that are used for cutting applications. These applications also require precise control and hence NEMA 42 Stepper motor is highly preferred electrical motors for CNC applications.
3-D Printing or Rapid Prototyping Industries:
3-D printers requires precise control and accuracy for their operation and hence these type of printers use NEMA 42 Stepper motors. These motor provide a high level of precision because of the direct relationship between the rotation angle and the input pulse. They can be paused, and the direction of rotation can be reversed with a great precision, making the NEMA 42 Stepper motor an excellent component to be used for rapid prototyping applications.
The above paragraphs clearly explains that the NEMA 42 Stepper motors finds a wide application in the fields where precision and accuracy is required.
A stepper motor is an electromechanical device that induces mechanical movements by converting electrical pulses. It is driven by digital pulses instead of continuously applied voltage, and it can step or rotate in fixed angular increments. Stepper motors are typically used in applications that require position control. They are assumed to follow digital instructions when used in a stepper motor/driver/controller system design. They are classified as open-loop systems due to their lack of feedback to keep control of the position. Stepper motors can be classified into three basic types:
Computer Numerical Control (CNC) equipment are machines that are typically used in manufacturing. CNC stands for ‘computer numerical control’ and machines that use this technology rely on computers to control tools like lathes, routers, grinders, and mills. Precise movement is required to ensure accuracy and reliability, and this is one of the reasons why stepper motors are preferred for CNC equipment. A stepper motor is an electromechanical device that performs mechanical movements by converting electrical pulses. The most preferred types of stepper motors are – linear stepper motors, geared stepper motors, PM stepper motors etc.
Stepper motors are brushless motors that use multi-toothed electromagnets to define the position. The electromagnets are fixed around a centralized gear. NEMA numbers define the standard dimensions of a faceplate for mounting a motor. NEMA 17 stepper motors are stepper motors with a 43.2mm x 43.2mm (1.7 inch x 1.7 inch) faceplate. They are heavier and larger than a NEMA 14, but their size is what ensures more room for higher torque. NEMA 17 is the most common size for stepper motors used in 3D printers. They can be designed and manufactured to have different mechanical and electrical specifications to suit the 3D printer that you want to build. Continue reading
The stepper motor (and power supply voltage) that you choose should depend on what you intend to do with it. Ideally, the stepper motor must provide sufficient power at the highest speed based exactly on what the application requires. Hence, you need to make sure that it does not exceed specific speed requirements. For instance, a maximum shaft power that you can sustain with a drive that functions at 80VDC and 7A is one third of a horsepower or at 250W. In this case, you need a triple or double stacked NEMA 34 motors. Continue reading
One of the most important components of properly functioning equipment is good electric motor design. All of the manufacturing industry relies on efficient designs of components for products to run properly. If the current electric motor design for your original equipment has room for improvement or simply isn’t meeting your expectations, replacing it with custom designed electric motor is a viable solution to ensure maximization of end results. Outsourcing custom designed motors offers a wide range of benefits for companies:
Compact, and highly efficient motor, widely used for applications where the starting torque requirement is 100 per cent or less of the machine’s or device’s full load. It allows for very smooth acceleration, featuring a run and start winding with a capacitor that is connected in series. Both the start and run windings are energized once the motor starts running. No switch is also required to take any one component out of the circuit.
A permanent magnet DC motor is useful for different applications in various industries, especially in the medical diagnostic field. In fact, it is a crucial component in tomographic systems, X-rays, and pumping equipment. PMDC motors are preferred for their robust motion control and efficient power transmission, both of which may be essential in a wide range of applications. The DC motor itself may be compact, but its speed varies greatly, and it is compatible with many kinds of power sources. Moreover, it is safe to use with low voltage equipment.
The automation aspect of certain types of systems and equipment will depend on the type of stepper motor that you use. NEMA hybrid stepper motors are recommended if you want a versatile stepper motor that can work with most industrial automation requirements. The technology behind NEMA stepper motors, like the NEMA 23, is far advanced because of its precision and high-torque design.