Optical encoders are widely used as position measuring instruments in machine tools, conveying equipment, industrial automation, and measurement and testing equipment. Today, we'll introduce some basic measurement knowledge. The optical scanning measurement reference of Heidenhain optical encoders is a periodic grating . These gratings are mounted on a glass or steel substrate. It must be said that Heidenhain's grating technology has reached its pinnacle. Let's take a look:
01 AURODUR : Lines etched on gold-plated steel strip, typical gate pitch 40 μm
02 METALLUR : Anti-fouling gold-plated metal lines with a typical gate pitch of 20 μm.
03 DIADUR : Ultra-hard chrome wire mesh on a glass substrate (typical pitch 20 μm ) or three-dimensional chrome wire mesh on a glass substrate (typical pitch 8 μm ).
04 OPTODUR Phase Grating: Optical three-dimensional planar grid lines, ultra-high reflectivity, typical grating pitch not exceeding 2 μm
This method not only enables the fabrication of gratings with extremely small pitches, but also produces grating lines with clear and uniform edges. These clear and extremely uniform lines are key to outputting high-quality signals. Combined with Heidenhain's unique photoelectric scanning technology and absolute measurement method, this precision measurement can be described as "absolutely amazing."
Absolute measurement refers to the encoder providing position values immediately upon power-up, which are readily available for subsequent signal processing circuitry. There is no need to move the axis to perform a reference point homing operation. Absolute position information comes from a series of absolute codes forming grating lines. Individual incremental track signals generate position values through subdivision, and can also generate selectable incremental signals.
However, in addition to the photolithography technology mentioned above, we would also like to share with you today the inductive measurement technology of Heidenhain subsidiary AMO. This primarily aims to provide customers with more measurement technology solutions.
Some applications of AMO encoders include machine tools and other related sheet metal and metal processing equipment, medical technology machines, printing presses, specialized equipment for electronics and semiconductor manufacturing, and the automotive and aerospace industries.
AMO 's focus is on developing, manufacturing, and distributing linear and angular measurement systems for motion control feedback applications based on inductive sensing AMOSIN® . The inductive sensing approach combines the accuracy of optical encoders with the durability of magnetic encoders.
Linear measurement
Based on its patented inductive measurement principle, AMO offers a wide range of inductive linear measurement systems with accuracy and resolution comparable to optical encoders, but with the robustness of IP 67 protection. Linear encoders are not sensitive to contamination, and accuracy and operation can be guaranteed equally effectively even in harsh environments.
Angle measurement
AMO also offers a wide range of angle measurement systems based on its patented inductive measurement principle. Absolute and incremental measurement systems can be used for both external and internal measurements.
After all that, if you have any questions, please leave a message below and we will follow up promptly! If you need to communicate with our technical or sales teams, please leave your contact information or call 010-80420000 for more information!
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