The sensor modules in the EBx7800 family are FixPitch sensor modules based on the Giant MagnetoResistive (GMR) effect. The sensor modules were developed specifically for use in ferromagnetic tooth structures. A magnet is therefore integrated into every sensor module to stimulate the tooth structure.
This operating principle allows existing machine elements, such as gear wheels or threaded spindles, to be used as measurement scales. These must have a ferromagnetic material property and must have a tooth pitch that matches the sensor pitch.
No specific tooth forms are required. This also allows the sensors to be operated on a hole structure or a square tooth structure.
The sensor signals of the sensor modules are processed in an ASIC and can be used directly from the controller. The modules are set by us during production and are optimally calibrated.
Sensitec is increasing the sensor efficiency by means of various design modifications to the chip layout. The patented solutions, described more closely below, also contribute to better signal quality, reduced sensitivity to stray fields and increased control accuracy.