Feed servo system: It is an automatic control system with the position and speed of moving parts as the control quantity. It is a typical mechatronic system, mainly composed of position control unit, speed control unit, drive unit (motor), detection and The feedback unit and the mechanical actuator are composed of several parts.
Digital measurement: It will be measured in the form of a number. The measurement signal is generally an electrical pulse, which can be sent directly to the numerical control device for comparison processing and display. Such detection devices include a grating detecting device and a pulse encoder. The digital measuring device is relatively simple, and the displacement pulse signal has strong anti-interference ability.
Analog measurement: It is measured by continuous variables such as amplitude change and phase change of voltage. Analog measuring devices include a resolver and an inductive synchronizer. The analog measurement (such as the phase change voltage) can be directly sent to the CNC system to compare with the phase-shifted command voltage signal; or the analog signal (such as the amplitude-varying voltage signal obtained by the amplitude measurement) After being converted into a digital pulse signal, it is sent to the CNC system for comparison and display.
Incremental measurement: The detection device only measures the increment of the displacement, and uses the number of digital pulses to indicate the number of unit displacements (ie, the minimum set unit). Grating, pulse encoder, resolver, Inductosyn incremental magnetic grid, etc. are absolute measuring device measuring <br> <br>: detecting means detects that a test member in the absolute coordinate system Absolute coordinate position, and expressed in binary or decimal digital signals, generally after being converted into pulse digital signals, sent to compare and display. Such measuring devices have absolute pulse encoder discs and three-speed absolute encoder discs ( Or a multi-turn absolute encoder disc, etc., its structure is more complicated, and the resolution and displacement of the measurement are limited.
Spindle orientation control (or spindle quasi-stop): refers to the function of accurately positioning the spindle in a specific position in the circumferential direction. In the NC machine tool, in order to realize the automatic tool change, the robot can accurately load the tool into the spindle hole. The keyway of the tool must be aligned with the key position of the spindle in the circumferential direction; in the boring process, when the tool is retracted, the tool is required to be moved in the opposite direction of the tool tip and moved radially for a certain distance before exiting, so as not to scratch the workpiece, all of which are The spindle is required to have a circumferentially accurate positioning function.
C-axis control function: It is a function to realize arbitrary position control of the spindle in the circumferential direction. Obviously, spindle orientation control is a special case of C-axis control.
Synchronous control function: It is a control function that maintains a certain relationship between the spindle rotation angle and the feed rate of a certain feed axis (the Z-axis is passed).
Previous page
ZHEJIANG HESHUO TECHNOLOGY CO.,LTD , https://www.hosuocn.com