Key points to note regarding the maintenance and upkeep of CNC equipment primarily include the maintenance of the CNC system, mechanical components, lubrication system, machine tool precision, and other routine maintenance measures. The following is a detailed summary of these key points:

### I. Maintenance of the CNC System

1. **Strictly adhere to operating procedures and daily maintenance regulations**: This can effectively prevent the occurrence of equipment anomalies and extend the service life of the equipment.

2. **Minimize opening the CNC cabinet and high-voltage cabinet doors**: The air in the machining workshop may contain oil mist, dust, or even metal powder. If this settles on the circuit boards or electronic components inside the CNC system, it can easily cause a decrease in the insulation resistance between components, or even damage to components and circuit boards.

3. **Regularly clean the CNC cabinet's heat dissipation and ventilation system**: Regularly check whether the cooling fans on the CNC cabinet are working properly and whether there are any blockages in the air ducts.

4. **Regular inspection and replacement of motor brushes**: Excessive wear of the brushes will affect the performance of the motor.

5. **Regular replacement of storage batteries**: The CNC system has a rechargeable battery maintenance circuit for storage devices to ensure that the contents of its memory are retained when the system is not powered. Generally, even if they haven't failed, they should be replaced annually.

6. **Maintenance of spare circuit boards**: Unused printed circuit boards should be periodically installed in the CNC system and powered on for a period of time to prevent damage.

### II. Maintenance of Mechanical Components

1. **Maintenance of the main drive chain**:

* Regularly adjust the tightness of the main spindle drive belt to prevent slippage.

* Check the constant temperature oil tank for main spindle lubrication, adjust the temperature range, replenish oil in a timely manner, and clean the filter.

* Timely adjust the displacement of the hydraulic cylinder piston to ensure the normal operation of the tool clamping device.

2. **Maintenance of the ball screw and nut assembly**:

* Regularly check and adjust the axial clearance of the ball screw and nut assembly to ensure reverse transmission accuracy and axial stiffness.

* Regularly check whether the connection between the screw and the bed is loose, and replace damaged screw protection devices in a timely manner.

3. **Maintenance of the tool magazine and tool changer**:

* It is strictly forbidden to load overweight or oversized tools to prevent collisions during tool changes.

* Ensure that the tools are in place and securely locked.

* Frequently check the zero return position of the tool magazine and the tool change point position of the machine spindle to ensure the normal operation of the tool change.

### III. Maintenance of the Lubrication System

1. **Regularly clean or replace filters**: Maintain the cleanliness of the lubrication system.

2. **Regularly test and replace hydraulic oil**: Ensure the quality of the hydraulic oil.

3. **Clean foreign objects from the cutting oil supply system**: If the cutting oil precipitates, solidifies, or deteriorates, it should be replaced promptly.

### IV. Maintenance of Machine Tool Precision

1. **Regularly check the machine tool level and mechanical precision**: Use both soft and hard methods to correct mechanical precision. Soft methods mainly use system parameter compensation, while hard methods are generally performed during major machine overhauls.

### V. Other Routine Maintenance Measures

1. **Machine cleaning**: Clean workpieces, jigs, iron filings, etc., inside and outside the machine tool, wipe the external sheet metal, and clean the air conditioner, oil cooler filter screen, etc., in the electrical control cabinet.

2. **Rust prevention**: Clean and wipe the worktable and apply rust preventive oil; run the machine tool at a slow speed for one hour to lubricate the linear rails; regularly change the cutting fluid and perform rust prevention work.

3. **Water and moisture prevention**: Close the electrical boxes and take protective measures.

4. **Rodent control**: Prevent rats from biting wires and causing malfunctions.

5. **Electrical system maintenance**:

* Regularly check the system fans. If they are excessively contaminated with oil, they should be replaced or cleaned.

* Regularly check the hydraulic oil pressure, level, and hydraulic impurities in the hydraulic system to ensure that the oil passages are unobstructed.

* Regularly clean or lubricate spring-loaded components.

* Regularly clean according to the degree of oil contamination of the equipment.

* Regularly replace the desiccant in the machine tool electrical cabinet.

In summary, the maintenance and upkeep of CNC equipment is a comprehensive task that involves multiple aspects and details. Only by comprehensively and meticulously performing these tasks can the normal operation and long-term stability of CNC equipment be ensured.