CNC machine tools are prone to interference factors and anti-interference measures in the workshop

One. Electromagnetic interference

The power supply of electric sparks, medium and high frequency electric heating equipment will produce strong electromagnetic waves, which will be accepted by the nearby CNC system through spatial propagation, and if the energy is sufficient, it will interfere with the normal operation of the CNC machine tool. (Keep away from these devices)

Two. Interference with power supply lines

Ø The input voltage is overvoltage or undervoltage and causes the power supply to alarm and shut down

Ø The error message caused by the waveform distortion of the power supply will cause the CPU to stop running

Three. Signal transmission interference

Ø Serial-mode interference—the interference voltage is superimposed on the desired signal.

Ø Common-mode interference—the interference voltage interferes with two or more signal lines of equal magnitude and phase.

Four. Anti-interference measures

1. Reduce the interference of the power supply line

2. Reduce interference in machine tool control

3. Shielding technology (electromagnetic, electrostatic shielding)

Signal wires are shielded (copper mesh) or worn through iron snakeskin tubes or iron pipes, and key components or assemblies are shielded in metal containers.

4. Make sure that the “grounding” is good

“Grounding” is a key anti-interference technical measure in the installation of CNC machine tools. Many disturbances in the power grid of the city act by “grounding” the machine tool.

Grounding requirements: the grounding should be reliable (the grounding resistance should be less than 100 ohms), and the grounding wire should be thick (should be greater than the cross-sectional area of the power line).

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