One CNC double Grinding head The grinder can grind the outer circle, the inner circle and the end surface, which requires its supporting CNC system to complete the work of two or more systems at the same time. Dasen21 is a 4-axis 4-channel newly developed by Dasen nanometer Class NC system. Each channel works completely independently or some channels work strictly synchronously to control Wuxi open source Machine tool Double channel CNC grinding machine developed.

Some of the main functions of the system include nanometer level high-precision control. The pulse equivalent of the system can be controlled by the light ruler or servo electric machinery The actual resolution of the position feedback signal is set to ensure high-precision control. The smaller resolution is 1nm. At present, the regulating frequency of speed loop and position loop is set to 1000Hz, and the next target is 5000Hz. The main problem of nano scale control of the limiting system depends on the machine tool.

High frequency high precision oscillation function. The oscillation axis of the system adopts independent channels, and its oscillation frequency and amplitude are set by parameters. The start and stop of the oscillation axis are controlled by the feed axis channel to ensure the synchronization between the feed axis and the oscillation axis. The system has two oscillating shafts and two feed shafts, which can control two grinding heads to work at the same time.

High speed input port trigger function. When the system executes G31 code, the longer time from the input signal being triggered to the system responding to immediately execute the next command is 0.5ms, so as to ensure the accuracy of the grinder.

Servo axis dynamic test function. The system can set the acceleration/deceleration value and movement mode of each axis by itself, and can also set the sampling frequency of the position sensor by itself and show the speed loop error difference and position loop error difference by oscilloscope. The speed loop and position loop are optimized by minimizing the error to adjust the parameters and ensure the machining accuracy.

Automatic high-density axis error compensation function. Each axis of the system can be either a single motion axis or a composite axis formed by the same oblique axis. The position deviation compensation can be carried out for each axis at any position. The more compensation points, the higher the accuracy. In addition, there is no limit on the number of compensation points. The system automatically enters the laser measurement data into the CNC system to automatically form a high-density small distance position deviation compensation, thus greatly improving the accuracy of the machine tool.

High precision full closed loop feedback function. The system can accept the simulated encoder signal from the servo motor driver to form a semi closed loop, and can also accept the position signal from the grating ruler to form a full closed loop. Incremental signals and value signals can also be accepted. In addition, the resolution of the position signal can be set to 1nm by any software.

Special graphic functions. The system can not only enlarge the local motion track graphically, but also continuously enlarge it to the screen. 1 mm represents 1 μ m to magnify the results of local processing.