Requirements for open linear grating ruler

The development direction of motion control applications requires open linear grating rulers to meet the continuous improvement of market demand for the following functions

KThe series meets all these requirements!

For special requirements such as closed-loop control, speed control, high-precision applications, etc., it is necessary to minimize subdivision errors to the greatest extent possible. The disadvantage of small pitch grating rulers in the past was that the installation gap was small and the overall installation tolerance requirements were very strict.

The 40um grid spacing of the K series grating ruler minimizes subdivision errors and has a large installation tolerance, allowing for a larger installation space.

The weakness of many open linear grating rulers is their sensitivity to dust or dirt on the grating ruler. The K series grating ruler adopts a unique optical system to minimize the impact of dust and dirt on open linear grating rulers.

Moreover, the K series adopts a unique scanning principle, allowing for higher movement speeds (up to 10m/s), larger installation tolerances, and high anti pollution performance of the grating ruler.

The standard configuration has high reference point accuracy, allowing for bi-directional movement and high repeatability accuracy. The location of the reference point can be chosen by the customer.

The encoder reading head is equipped with a rich selection of subdivision electronic circuits, with a resolution of up to 100nm.

The output signal of the grating ruler reading head is a single ended square wave signal, or a signal from the line driver RS422, and also provides a 1Vpp sine output signal. Reading head

Provide two independent magnetic switch signals directly. Allow users to easily set the position of the travel limit switch.

Due to the development of the latest technology, small grating rulers offer the above advantages.

Scanning principle

The K series incremental linear grating ruler adopts imaging, photoelectric measurement, and single field reflection scanning methods.

The modulated infrared LED light is focused by a condenser lens, allowing the light to pass through a mask grid. The infrared LED light is reflected by the grating ruler and forms a periodic signal of brightness at the grating sensor.

The sensor generates high-quality sine signals and is insensitive to possible pollution.

Modulation of LED light is used to ensure stable light signal output, which can maintain the stability of light source performance even with temperature changes and long-term operation.