Common faults of engraving machine 1, such as short circuit of spindle motor, broken bearing, broken rotor, rotor sliding line, etc. 2. Limit switches and limit switch wires are easily broken. 3. The bearing of Z-axis 608 is easy to break, and the coupling is pulled apart, which often causes the Z-axis cutter to get stuck or have different depths. 4. The water pump is easy to ring or not produce water. 5. The compass is prone to slip marks after half a year. 6. When the Z-axis screw is used for a long time, it will be out of tune. When walking up and down, the dust on Axis 7, Axis Z and Axis Y is often blocked, and there are too many dirty things. 8. The nuts on the X axis and Y axis are easy to fall off, and the top thread of the machine is easy to loosen. 9. The inverter is easy to short circuit and the stepping motor is easy to turn. Pay attention to the safe use of electricity when using the engraving machine with a gap between the upper and lower shafts. 10, the reason why the computer signal of engraving machine can't be transmitted:

1) Software parameter setting is incorrect.

2) The machine is not connected to the computer.

3) There is something wrong with the computer serial port.

4) The software transmission rate is inconsistent with the baud rate setting of the engraving machine. Solution:

1) resets the parameters.

2) Press the "Offline" key to turn off the off-line light.

3) Use another serial port

4) Reset baud rate

1, grounding device and zero connection device

Grounding device consists of grounding body and grounding wire (including grounding network). The zero connection device consists of grounding body and zero line network (excluding working zero line). All metal pipes buried underground and in close contact with soil (except pipes and water pipes flowing through flammable or explosive media), metal piles of buildings and metal sheaths of cables buried directly underground (except aluminum sheaths) can be used as natural grounding bodies. Artificial grounding body can be made of steel pipe, round steel, angle steel and flat steel. In general, the grounding body should be buried vertically, and the depth of the vertical grounding body should be about 2.5 meters. There are usually not less than two vertical artificial grounding bodies, and the spacing should be 2.5-3 meters. In rocky areas, the grounding body can be buried horizontally, and the buried depth should not be less than 0.6m.. Underground grounding body should not be painted.

2. The minimum size of steel grounding wire, grounding wire and grounding body is round steel in underground and underground rooms, with a diameter of (mm) 5 6 8, a flat steel section of (mm 2) 24 48 48, a thickness of (mm) 3 4 4 angle steel and a thickness of (mm) 2 2.5 4 steel pipe. Wall thickness (mm) 2.5 2.5 3.53 Minimum section material type Copper and aluminum grounding wire bare conductor insulated conductor copper (mm2) 4 1.5 aluminum (mm2) 6 2.5 4 Others.

The safe current carrying capacity of the sections of grounding wire and neutral wire shall be not less than half of the phase wire. Underground, bare aluminum conductor shall not be used as grounding body, grounding wire or neutral wire. Under normal circumstances, the grounding device of electrical equipment should not be mixed with lightning protection grounding device, and the distance between them should be less than 3-5 meters to avoid dangerous voltage on electrical equipment when lightning strikes.