Resolvers were initially developed for military applications and are probably best known as the preferred feedback solution in harsh environments. Where optical or magnetic encoders are sensitive to dust, liquids, and magnetic fields, resolvers can operate in dirty, humid, wet, and high-radiation environments. But what is it that makes them so robust under conditions that […]
Absolute Encoders
POSITAL adds to its range of kit encoders
POSITAL is expanding its line of kit encoder solutions for motion control applications to satisfy a wider range of needs faced by machine builders, system integrators, and motor manufacturers. Kit encoders are component-level products, designed to be built into motors or other types of equipment where real-time measurement of rotary position (angular displacement) or rotational […]
What is an LVDT (linear variable differential transformer)?
A linear variable differential transformer (LVDT) is an absolute measuring device that converts linear displacement into an electrical signal through the principle of mutual induction. Its design and operation are relatively simple, providing extremely high resolution in a device suitable for a wide range of applications and environments. The main components of an LVDT are […]
Heavy-duty absolute encoders — now with EtherCAT communications
New EPC Model A58HE and Model A58SE are EtherCAT-ready, multi-turn absolute encoders for harsh factory and plant environments. They work in applications where fieldbus connectivity is required, and the encoder must retain absolute position information after power-off events. The Model A58HE is a 58-mm encoder in a hollow-bore construction, and the Model A58SE is a […]
POSITAL closed-loop motor feedback for absolute positioning
POSITAL FRABA encoders for closed-loop motor feedback allow upgrades to existing motion control applications. The mechanical drop-in replacement encoders have the same footprints as US Digital’s E5 models and Broadcom’s (Avago) HEDS-5500 models. POSITAL kit encoders provide absolute position feedback — to give controls complete information on the physical position of the mechanical components they’re […]
Totally encapsulated J1 rotary encoders IP69k electrical protection from Joral
Joral LLC now has a new method to impart total encapsulation in its J1 electronic components. Specially crafted to ensure total protection from extreme temperature fluctuation, intense machine vibration, and pressure wash down, the Joral J1 line-shafted rotary encoders perform rotary motion feedback for industry, ranging from directional drilling rigs to timber harvesters. The new […]
POSITAL Motor Feedback Kit Encoders — now with open-source BiSS interface
Rotary encoder specialist POSITAL has expanded its interface offerings for its magnetic Kit Encoders with support for the nonproprietary open-source BiSS Line communication protocol. This enables the practical implementation of single-cable technology, which is becoming increasingly popular with motor and robot manufacturers. POSITAL’s easy-to-install motor feedback kits, which feature 17-bit electronic resolution, bridge the gap […]
What is modulo positioning?
In motion control, there are typically two types of positioning that can be used for a linear or rotary axis: relative, in which each position is based on a previous position, regardless of the actual position of the axis; or absolute, in which each position is referenced to a home, or zero, point. Axes that […]
Absolute, high-resolution motor feedback sensor from SIKO
The MSAC501 absolute sensor from SIKO offers a truly absolute solution for measuring motor feedback. The exact sensor position is available immediately after a current interruption so additional reference or mechanical activity is not necessary. The MSAC501 sensor works with standardized SSI or RS485 interfaces. An optional LD output for digital signal output is also […]
Hollow-bore absolute encoder from Encoder Products Co. (EPC) and technical help on options
The Model MA58H absolute encoder from Encoder Products Co. (EPC) is heavy duty, rugged and reliable. This multi-turn hollow-bore absolute encoder is designed for harsh factory and plant floor environments … and is especially suited to applications where you need an encoder with the capability of output even in power-off scenarios. The Model MA58H has […]
