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Tag Archives: linear encoder
Linear encoders – absolute or incremental? Incremental encoders are simple, inexpensive, and easy to implement, but they require that the machine be homed or moved to a reference position. Absolute encoders don’t require homing, but they’re usually more expensive, and … Continue reading
Linear encoders can do a lot to improve factory automation. When used as secondary feedback they can greatly enhance the precision of motion control systems. They can act as a feedback device for automatic size change, and they can be … Continue reading
Tabletop automation is a trend that is gaining momentum, especially in the fields of medical laboratory automation and 3D printing. Both of these applications demand a level of linear positioning accuracy and speed that might suggest a servomotor as a … Continue reading
Precision Tape Magnetization Leads to Precision Position Measurement The key to ultimate accuracy for any magnetic linear encoder system is the precision of the magnetic encoding on the tape (sometimes called a scale). Sensors inside the encoder read head respond … Continue reading
Motion control system designers have found a way to eliminate or reduce common sources of position error, such as mechanical backlash, non-linearity, and hysteresis. The method is called direct load position sensing and it employs linear encoders as a source of … Continue reading
When it comes to magnetic incremental linear encoders, sometimes the configurable performance parameters can be a tad obscure. One of the most puzzling is the feature called “Minimum Edge Separation”. Just for review, a magnetic incremental linear encoder system consists of a … Continue reading
In last month’s discussion “Automatic Size Change on a Budget – Part I”, we talked about the designer’s dilemma: accomplish size change at low cost with an unsophisticated manual size change mechanism, or achieve high-performance automatic size change using costly servo drives. This month we will look at some alternatives that nicely bridge the gap between affordability and automatic (or, semi-automatic) operation. Continue reading
Written by: Bjoern Schaefer Scott’s article on analog resolution provides a great understanding of analog signal evaluation, which I’d like to expand on with a brief summary about typical performance criteria of linear measurement systems.