What are the requirements for the sensor of CNC lathes?

Due to the characteristics of high precision, high speed and reliability, CNC machine tools have been rapidly popularized in enterprises in the upgrading of manufacturing technology and equipment. A CNC machine tool is an automatic machine tool equipped with a program control system, which makes the machine tool move and process parts according to the programmed program. It combines mechanical, automated, computer, measurement, microelectronics, and other new technologies using a variety of proximity sensors.

The basic requirements of the proximity sensor of CNC machine tools: 1. The sensor has strong anti-interference ability and high reliability; 2. The sensor should meet the standards and requirements of speed and accuracy; 3. The use and maintenance of the sensor is more convenient; 4. The cost of the sensor is very low. There are also differences in some requirements for sensors for different types of CNC machine tools, usually, the requirements for sensors for high-precision and medium-sized CNC machine tools are mainly reflected in the accuracy, while the requirements for sensors for large CNC machine tools are mainly reflected in the speed response.

Sensors used in CNC machines:

Hydraulics: temperature, pressure, level.

Transmission system: displacement (position), position detection.

Electrical system: speed, current, voltage.

How it works: That's what countless books and generations can explain.

Requirements for sensors on CNC woodworking lathes:

1) High reliability and strong anti-interference;

2) Meet the requirements of precision and speed;

3) Easy to use and maintain, suitable for the operating environment of the machine tool;

4) Low cost.

Different types of CNC woodworking lathes have different requirements for sensors, generally speaking, large lathes require high speed response, and medium-sized and high-precision CNC woodworking lathes mainly require accuracy.

Position sensing devices in CNC machine tools are mainly classified.

a.Linear displacement sensors.

Linear displacement sensors are used to measure the displacement of the table and are usually mounted on the side of the table. In order to make the thermal expansion coefficient of the sensor the same as that of the machine bed, the material of the sensor should be selected, otherwise the accuracy of the measurement will be affected. Linear position sensors also need to avoid contamination by oil mist, coolant, chips, etc.

b.Angular displacement bypass sensors are used to measure the angular displacement of the propeller shaft. When measuring the linear displacement with the angular displacement sensor, it is required that its measured value has a certain correspondence with the linear displacement of the workbench, and the angular displacement sensor is usually installed at the end of the lead screw that drives the workbench to move.

There are only two forms of output for displacement sensors, i.e., analog or digital;

Linear or angular displacement sensors may also be absolute, semi-absolute, or incremental displacement sensors.

The sensor is a device or device that can feel the specified measurement and convert it into a usable output signal according to a certain law, and its input signal (measured by Shenzi) is often non-electricity, and the output signal is often an easy-to-handle electricity, such as voltage.

There are many types of sensors, including resistance sensors, inductive sensors, capacitive sensors, temperature sensors, piezoelectric sensors, Hall sensors, thermocouple sensors, photoelectric sensors, digital position sensors, etc. The sensors commonly used in CNC machining centers mainly include photoelectric encoders, linear gratings, proximity switches, temperature sensors, Hall sensors, current sensors, voltage sensors, pressure sensors, liquid level sensors, resolvers, induction silver synchronicators, speed sensors, etc., which are mainly used to detect position, linear displacement and displacement of the skin angle, speed, pressure, temperature, etc.

Sensors used in CNC machines:

Hydraulics: temperature, pressure, level.

Transmission system: displacement (position), position detection.

Electrical system: speed, current, voltage.

How it works: That's what countless books and generations can explain.

Photoelectric sensing, ranging sensing.

Transducer sensor is a detection device that can feel the measured information, and can transform the felt information into electrical signals or other required forms of information output according to a certain law, so as to meet the requirements of information transmission, processing, storage, display, recording and control.

The characteristics of the sensor include: miniaturization, digitization, intelligence, multi-function, systematization, and networking. It is the first link to realize automatic detection and automatic control.

The existence and development of sensors allow objects to have senses such as touch, taste, and smell, allowing objects to slowly become alive. It is usually divided into ten categories: thermal elements, photosensitive elements, gas-sensitive elements, force-sensitive elements, magnetic sensitive elements, moisture-sensitive elements, acoustic components, radiation-sensitive elements, color-sensitive elements and taste-sensitive elements according to their basic sensing functions.