Following a few rules when selecting a single-source supplier makes putting together a motion-control system a snap. Coreless dc motors are used in a prosthetic hand. Gold-alloy brushes ensure fluidity of motion and low noise actuation. The rubber skin coating provides feedback to the motor preventing crushed parts in sensitive applications. The M-850 Hexapod from Physik Instrumente, Germany, is a precision micro-positioning system with six degrees of freedom. Each piston arm contains a motor/encoder combination using a coreless, brushed-dc motor from Micro Mo. Submicron precision allows mircomanipulation and fiber alignment in precise surgical applications. A modified, brushed-dc motor from Micro Mo is used in this high-speed PCB wiring automation machine from Siemens. Each partfeeding device contains three motors. Designing a motion-control system can be a trying affair. Time and budget constraints often lead to only a quick review of several manufacturers. Because there are literally hundreds of suppliers, choosing the right one can be confusing and potentially jeopardize critical time to market. Start by discussing the application with technical buyers. They can offer a wealth of knowledge about the complexity of sourcing components for large systems. It is not uncommon to buy as many as 1,500 components for one application. Few, other than the technical buyer, can realize the benefits of bundling components into one supplier with one check, making one supplier responsible. Buyers generally negotiate with dozens of suppliers for hundreds of components and receive billing from dozens of manufacturers, a time-consuming and difficult chore prone to mistakes. An alternative is to select one supplier who will outsource to all the necessary component manufacturers. A reputable single source deals with them on a daily basis, knowing which ones can deliver quality parts quickly and at a fair price. Having one company generate one invoice saves reviewing, processing, and negotiating time.
Products & Services
DC motors are most commonly used in variable speed and torque applications. They include brushless and gear motors, as well as servomotors.
Motor controllers receive supply voltages and provide signals to motor drives that are interfaced to motors. They include a power supply, amplifier, user interface, and position control circuitry.
Motor and Generator Winding Services
Motor and generator winding services suppliers specialize in producing custom motors, generators and custom windings per customer specifications, as well as companies that specialize in motor repair and refurbishing.
DC servomotors are generally small and powerful for their size, and easy to control. Common types of DC servomotors include brushless or gear motors.
Stepper Motors (Rotary)
Stepper motors use a magnetic field to move a rotor in small angular steps or fractions of steps. They provide precise positioning and ease of use, especially in low acceleration or static load applications.
Topics of Interest
Medical Device & Diagnostic Industry In making motors for medical devices, striking the proper balance between size, cost, and performance can be brutal. A typical medical application might call...
After studying the chapter you should be able to:
identify the key issues, concepts and appropriate tools to source and procure supplies;
select and apply appropriate...
A well-behaved motion system depends on motor parameters derived from lab tests. When critical ratings are suspect, run the tests and measure the results yourself. Edited by John R. Gyorki One...
Manufacturers often try to cut the number of automation-component suppliers on their approved vendors lists, and for good reason. They have learned that it is usually false economy to shop around for...
Use Supplier Expertise
Demand Flow companies should make every effort to design parts that are easily produced. They should select standardized components, making sure to eliminate variances between...