A steel scale is installed on the BRTM rotary table bearing to form a cylindrical roller BRT combination bearing with bidirectional thrust, which can monitor and adjust precisely and meticulously at all times, allowing the cylindrical rollers with bidirectional thrust to The rotation accuracy of the combined bearing is more precise, and it can ensure the high-precision and long-term operation of the machine used. Because in the machine tool industry, it is often necessary to have a high demand for the rotation angle of the workpiece, which makes the angular displacement can be measured and controlled very accurately. The angular displacement measurement of the BRTM rotary table bearing is very important in modern industry. very important role.
At present, the more common measurement methods are grating coding and magnetic grating encoders, etc., but the steel grating measuring system we use has the characteristics of high precision, anti-pollution, no electromagnetic interference, and strong environmental adaptability. At the same time, because it is installed on the BRT rotary table bearing, it has high rotation accuracy and can bear various loads such as axial, radial, and tilting. It is a high-precision CNC turntable, dividing head, and measurement in the machine tool industry. High-precision occasions.
BRTM Rotary Table Bearing Construction
The whole steel grid system includes three parts: steel scale, reading head and electronic evaluator. The steel scale is mounted on the inner ring of the bearing. The readhead is mounted on the bearing outer ring. When working, the bearing rotates, the steel scale and the reading head make a non-contact relative movement, and the data collected by induction is transmitted to the electronic evaluator through the cable. The electronic evaluator then converts the data into a square wave or sine wave signal. These signals are input into the numerical control system of the machine tool, and the measurement and control of the angular displacement can be realized.
Advantages of steel grid measuring system
1. Non-contact inductive encoder, no wear;
⒉The precision can be compared with the optical encoder, and the precision is high;
3. The dual-reading head measurement system can correct the radial deviation of the bearing in real time.
4 High speed, high dynamic performance, and high resolution;
5. No magnetic components, no hysteresis response, no risk of degaussing;
6. Strong anti-interference to environmental interference such as solid particles, oil, etc., protection level IP67, can withstand a certain water pressure, dust tight, and insensitive to any type of pollution or dirt;
7. Compact design to solve the problem of narrow installation space for users;
8. Simple installation, fast speed, high shock and vibration resistance, good stability and high reliability;
9. Can output sine wave (1VPP) or square wave signal (TTL), compatible with CNC system.
Steel grid measurement system has various configurations. We can provide the best solution according to customer needs. When we provide solutions to customers, we need customers to provide the following information: positioning accuracy, speed, and cable length when the bearing is actually used. , the type of signal output, the number of lines, the number and type of reference point marks, etc.
Steel scale is divided into three accuracy grades: +/-3 u m [arc length], +/-5 u m [arc length], +/-10 u m [arc length] Reference point marking standard configuration: one reference every 360 degrees point marker.
According to the actual application requirements of customers: multiple distance coded reference mark signal output type: 1Vpp or TTL.
