Absolute high-speed open type linear scale

Requirements for open type linear grating scales

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

K series machines meet all these requirements

●For special requirements such as closed-loop control, speed control, and high-precision applications, it is necessary to minimize subdivision errors to the greatest extent possible. The disadvantage of small grid spacing grating scales in the past is that the installation gap is small, and the overall installation tolerance requirements are quite strict. The ●40um grid spacing of the dart grating ruler reduces the subdivision error to the minimum, and the installation tolerance is large, allowing for larger installation gaps.

●The weakness of many open linear grating rulers is their sensitivity to dust or dirt on the grating ruler. The K series grating scale adopts a unique optical system to minimize the impact of dust and dirt on the open line grating scale, ●Moreover, the K series adopts a unique scanning principle, allowing for higher motion speeds (up to 10m/s), large 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 position of the reference point can be selected by the customer.

●The scale reading head is equipped with a variety of selectable sub-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 mirror path driver RS422. lt also provides a sinusoidal output signal of 1Vpp. The reading head directly provides two independent magnetic switch signals. Allow users to easily set the position of the travel limit switch.

Due to the development of the latest technology, small-sized grating scales all provide these advantages.

Scanning principle

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

●The modulated infrared LED light is focused by a condenser allowing the light to pass through the mask grid.

●The infrared LED light is reflected by the grating ruler and forms a periodic signal of brightness change at the grating sensor.

●The sensor generates high-quality sine signals and is not sensitive to possible contamination.

●The modulation of LED light is used to ensure a stable optical signal output, which can maintain the stability of the light source performance even when temperature changes and long-term operation occur.