What Is a Coordinate Measuring Machine?

Coordinate Measuring Machine (CMM) is the most representative coordinate measuring instrument. In the coordinate measuring machine, a mechanical coordinate system is established with the platform of the measuring instrument as a reference plane, and the coordinate values of the measured points on the surface of the measured workpiece are collected and projected into the spatial coordinate system to construct a spatial model of the workpiece.

Coordinate measuring machine

To enable customers to better master and use the measuring machine, the simple maintenance and maintenance procedures of the measuring machine are listed ^[1] .

Preparation before starting the coordinate measuring machine

1. CMMs have stricter environmental requirements, and temperature and humidity should be strictly controlled according to contract requirements;

2. The CMM uses air-bearing bearings. In theory, the structure will never wear, but if the air source is not clean, there is oil. Water or impurities will cause the air bearing to block, and in severe cases

The air bearing and the air guide rail are scratched, with serious consequences. So check the machine's air source every day, put water and oil. Clean the filter and oil-water separator regularly. Attention should also be paid to the air source of the machine tool

The air source (air compressor or central air supply tank) should also be checked regularly;

3 The machining accuracy of the guide rail of the CMM is very high, and the clearance between the guide rail and the air bearing is very small. If there is dust or other impurities on the guide rail, it is easy to cause scratches on the air bearing and the guide rail.

Therefore, the guide rails of the machine should be cleaned before each boot. The metal guide rails should be wiped with aviation gasoline (120 # gasoline), and the granite guide rails should be wiped with absolute ethanol.

4 Remember not to give any kind of grease to any rail during maintenance;

5. Give a small amount of anti-rust oil to the polished rod, screw rod and rack regularly;

6. When the coordinate measuring machine has not been used for a long time, you should make preparations before turning on the machine: control the temperature and humidity in the room (more than 24 hours), and it should also be set in the humid environment of the south

Open the electric control cabinet in time, so that the circuit board is fully dried to avoid damage to the electric control system due to sudden power up after being wet. Then check whether the air source and power supply are normal;

7. Check the power supply before starting the machine. If necessary, configure a regulated power supply and regularly check the grounding. The grounding resistance is less than 4 ohms.

During the work of the coordinate measuring machine

1. Before testing the parts to be tested on the workbench, they should be cleaned and deburred to prevent the cooling liquid and processing residues on the surface of the parts from affecting the measuring accuracy of the measuring machine after the processing is completed.

Degree and tip life;

2. The measured parts should be kept at a constant temperature in the room before measurement. If the temperature difference is too large, it will affect the measurement accuracy;

3 Large and heavy parts should be placed lightly during the process of placing them on the workbench to avoid violent collision and damage to the workbench or parts. Can be placed on the workbench if necessary

Block of thick rubber to prevent collision;

4 After the small and light parts are placed on the workbench, they should be tightened before measuring, otherwise the measurement accuracy will be affected;

5. During the working process, the measuring head must be kept away from parts when it is rotating (especially with an extension rod) to avoid collision;

6. If there is an abnormal sound or a sudden emergency during the work process, do not disassemble and repair it by yourself. Please contact our company in time. The company will arrange trained personnel to go there and promise to help customers solve the problem as quickly as possible.

After the coordinate measuring machine is finished

1. Please move the Z axis to the bottom, but avoid hitting the stylus to the table;

2. Clean the work surface after the work is completed;

3 Check the guide rails. If there is a watermark, check the filter in time. If there are scratches or bumps, please contact the company in time to avoid causing greater losses;