Question 1
1. The bobbin can't be opened
Inspection method:
1. First, check whether there is a relay that is pulled in and released with the bobbin switch, then check the three-phase power supply circuit, whether the bobbin motor is two-phase, whether the fuse is broken and whether the relay contacts are intact.
2. If there is no relay pull-in, it means that there is something wrong with the relay control loop. The related components include a. Silk bobbin switch button b. Machine tool emergency stop button c. Silk bobbin travel switch, etc. It is especially important to note that our products also have an emergency stop button on the controller. If this button is pressed, the machine tool bobbin will not open. In addition, there is a limit switch on the machine tool electrical board. Only when the machine tool electrical board is pushed to the end, the switch will be turned on and the machine tool can work.
problem 2
2. The bobbin does not change direction
Inspection method:
The bobbin change direction involves the bobbin travel switch and two (or one) relays in the machine tool electrical appliances. Generally, the travel switch is more likely to be broken, as long as the travel switch is used. Note that the two above the travel switch zui are used for bobbin change direction, and the third is used for high frequency change direction (some models) Back to the top
Question 3
Third, press the water pump switch (or press the high-frequency switch) to stop the machine tool completely
Inspection method:
1. The machine tool of our company is connected with the function of broken wire to stop. To press the water pump switch (or high-frequency switch), you must first wear molybdenum wire, and the machine tool without molybdenum wire will stop immediately.
2. The broken wire stop wire is connected to an introduction seat, which must be a metal introduction. If the wire is broken or the guide wheel is rotated into a ceramic guide wheel, it will not work.
3. The broken wire stop plate is on the electrical board of the machine tool, and there are two triodes on the board, which are generally easy to break down, so it can be replaced according to the model.
Question 4
4. Drag plates of the machine tool X and Y (or U and Y).
2. If the external power supply is too low, it will also cause out-of-step. Check whether the power supply of the controller is normal, and consider providing a 22V regulator.
problem 5
5. One carriage of the machine tool is out of step or wobbles
Inspection method:
1. Replace the annular drive plate to determine whether it is a drive plate problem. If there is a problem with the drive plate, it is generally that the plate 3DD 1 or 3DK16B is broken.
2. Observe the indicator light of the stepping motor on the single board computer. There are three lights in one direction, which flash alternately during operation. If the Yi Deng is always on or dark, there is something wrong with the single board computer. Check whether the interface board 3DK2B or 74LS8 or the single board computer PIO is damaged.
3. There is a row of Fallon resistors at the bottom of the controller, which are the current limiting resistors of the stepping motor. If one resistor is broken or the connector contact is not good, it will also cause out-of-step or not.
4. There may be problems with the stepping motor, which can be judged by switching. First
Question 6
Sixth, there is no high frequency
Inspection method:
1. Whether the high frequency power supply has been electrified, whether there is a relay in the high frequency to change direction with the bobbin, or whether there is a check key on the high frequency power supply of some machine tools, you can check whether there is a problem with the high frequency. First, check whether the operating voltage on the driving board is normal or not, then there is a problem with the power board. Generally, there are several groups of high frequency driving boards that can be aligned.
2. The reversing relay has a set of normally closed contacts connected in series in the high-frequency control loop. If it is not good, there is no high frequency. Some machine tools have a reversing high-frequency switch specially. Check it.
3. there is a 3DK16 B on the
interface board of the single board computer, which is used for high-frequency output control. Check whether it is damaged. Back to
Question 7
VII. Manual walking and automatic not walking
Inspection method:
1. First, judge whether there is high frequency, so that the workpiece can touch the molybdenum wire. If there is spark, the high frequency is fine, and if there is no spark, there is no high frequency. See the above solution.
2. There are two leads at the workpiece clamping position, the thick one is high voltage (i.e. high frequency output), and the thin one is sampling input line. If this lead is broken, it will not go automatically.
3. There is a potentiometer for automatic frequency conversion, which is generally located on the machine panel. Check whether it is broken or damaged.
4. The easily broken components on the sampling board are 2CW12, T1L117, etc. Check it.