Classification by control
Open-loop control; that position feedback devices without control.
Semi-closed loop control; Cnc machining refers to the open-loop control with servo motor shaft angular displacement detecting device, by detecting the servo motor to detect indirectly the corner of the displacement of moving parts back to the NC device comparator compares the input command, with the difference value controls the moving parts.
Closed-loop control; is in the final of the moving parts of machine corresponding direct linear or rotary position detection device, will be directly measured value of
displacement or angular displacement feedback to the CNC device with comparator
compares the input command shift, Cnc machining with the difference value control moving parts, so
that moving parts in strict accordance with the actual needs of the displacement。
● control of machines by the number of performance categories
Economical CNC machine tools;
Mid-range of CNC machine tools;
High-end CNC machine tools;
● CNC equipment used by way of fractional composition of
Hard-line numerical control system;
Soft-line numerical control system;
Maintenance of CNC machine tools
Overview of CNC machine tool maintenance
Components and parts to extend wear life cycle, prevention of failure and improve the CNC machine tools, the average time between failures and service life. CNC machine tools in use should be noted that the problem
1. The use of CNC machine tools environment
CNC machine tools the best place for them away from the constant temperature and vibration environment of the larger equipment (such as the punch) and electromagnetic interference equipment.
2. Power Requirements
3. Practice for CNC machine tools should be
Regular maintenance, maintenance, Cnc machining failure of attention to such records to protect the scene.
4. Not long-term storage of CNC machine tools
5. Attention to training and equipment operators, maintenance personnel and programming staff.