Maintenance electrician skill 08 "Installation and maintenance of common machine tool electrical lines"
Electrical control circuit and working principle of M7120 surface grinder
M7120 surface grinder is mainly composed of main line, control line, lighting and indicator line and electromagnetic workbench line. It is briefly introduced according to the working principle and use of several parts of the line.
Electrical control circuit for M7120 surface grinder
Common faults and maintenance methods for M7120 surface grinder
malfunction:
1. The grinding wheel motor cannot be started. Possible causes, maintenance methods and techniques
2. Fault: The lifting and grinding motor cannot work. Possible causes, maintenance methods and techniques
3. The lift motor can only rise but not down or only drop and cannot rise. Possible causes, maintenance methods and techniques.
4. The grinder hydraulic pump motor cannot be started. Possible causes, maintenance methods and techniques
5. The electromagnetic table of the grinding machine does not work after operation, and the contactor does not suck. Possible causes, maintenance methods and techniques
6. The electromagnetic table of the grinding machine has no DC voltage output. Possible causes, maintenance methods and techniques
7. The grinder electromagnet workbench works, but it cannot demagnetize. Possible causes, maintenance methods and techniques
8. The workbench has DC voltage output, but the electromagnetic chuck does not work. Possible causes, maintenance methods and techniques
9. The grinder indicator is not lit or an indicator is not lit. , possible causes, maintenance methods and techniques
