What are the major factors affecting the accuracy of three-coordinate measurement in summer?

    [Summary Description]Generally speaking, the normal operating temperature of a production-type three-coordinate measuring machine should be20℃±2℃。The length standard of the three-coordinate measuring machine-grating is according to20℃corrected, and our three-coordinate measuring machine is also assembled and debugged at this temperature. When the temperature deviates too much, it will greatly affect the measurement accuracy.

    There are many factors that affect the measurement accuracy of a three-coordinate measuring machine, and an important factor is temperature. Generally speaking, the normal operating temperature of a production-type three-coordinate measuring machine should be20℃±2℃。The length standard of the three-coordinate measuring machine-grating is according to20℃corrected, and our three-coordinate measuring machine is also assembled and debugged at this temperature. When the temperature deviates too much, it will greatly affect the measurement accuracy.

    Below is an explanation of the influence of ambient temperature on the daily operation of a three-coordinate measuring machine.

　1、The influence of the temperature in the measuring room

    The temperature in the measuring room of the three-coordinate measuring machine gradually increases from bottom to top, and the temperature is changing every moment. Therefore, the difference between the grating temperature and the part temperature of each axis affects the accuracy of the measuring room of the three-coordinate measuring machine. This is a major factor affecting the accuracy of the measuring machine. When using a three-coordinate measuring machine, we should try to keep the ambient temperature of the measuring room consistent with that during calibration. In addition, electrical equipment, computers, and personnel are all heat sources. When installing the equipment, proper planning should be done to keep electrical equipment, computers, etc., at a certain distance from the measuring machine. The measuring room of the three-coordinate measuring machine should be well managed to prevent unnecessary personnel from staying. The management of the use environment of high-precision three-coordinate measuring machines should be even stricter.

    2、The influence of the on-off time of the air conditioner on the temperature of the measuring room

    Many users manage the air conditioning in the three-coordinate measuring room as follows: turn on the air conditioner when using the measuring machine and turn it off after use. This method has a great impact on the accuracy of the three-coordinate measuring machine. To keep the temperature of the three-coordinate measuring machine consistent with the air temperature, constant temperature is required24hours or more. Turning the air conditioner on and off immediately causes the temperature in the measuring room to constantly change, and the temperature of the three-coordinate measuring machine is also constantly changing. At this time, the machine is in an unstable state, and the accuracy will be poor. In this case, the insulation performance of the measuring room should be improved as much as possible. Turn on the air conditioner every morning when you come to work and turn it off in the evening when you leave work. After the temperature in the measuring room stabilizes for about4hours, the accuracy of the three-coordinate measuring machine can be stabilized. This working method seriously affects the use efficiency of the measuring machine, and the accuracy is difficult to guarantee in winter and summer, which will also have a great impact on the normal and stable operation of the three-coordinate measuring machine.

    3、The influence of the measuring room structure on the temperature

    Since the measuring room of the three-coordinate measuring machine requires constant temperature, the measuring room must have insulation measures. If there are windows, double-glazed windows should be used, and curtains should be added to avoid sunlight. The entrance should use a transition room as much as possible to reduce heat loss. The selection of air conditioning in the measuring room should be appropriate for the room. If the machine room is too large or too small, it will make temperature control difficult.

    4、The influence of the air conditioner's air direction on the temperature of the three-coordinate measuring machine

    The air conditioner in the measuring room of the three-coordinate measuring machine should preferably be a variable frequency dual-system air conditioner. Variable frequency air conditioners have good energy-saving performance, and more importantly, strong temperature control capabilities. Under normal capacity, temperature control can be within±1℃range. Because the temperature of the air blown out by the air conditioner is not20℃，therefore, the air must not be allowed to blow directly onto the three-coordinate measuring machine. Sometimes, in order to prevent the wind from blowing onto the three-coordinate measuring machine, the air direction is turned towards the wall or to one side, resulting in a situation where one side of the measuring room is hot and the other side is cold, with a large temperature difference. The installation of the air conditioner should be planned, and the air should be blown to the main positions in the room, and the air direction should be upward to form a large circulation (it cannot blow to the measuring machine), so as to make the indoor temperature as even as possible.

    If conditions permit, air ducts should be installed to send the air to the top of the room and send the air through a double-layer perforated plate, and the return air outlet is at the bottom of the room. In this way, the irregular flow of air can make the temperature control in the measuring room more reasonable.