In the production process, for the reasons of throwing, the situation of sucking off position often occurs.Today we will talk about component sucking off position, which finally causes the problem of identifying throwing.

 

Since it is offset, the two directions of XY should be distinguished accordingly. Therefore, there are two codes in the FUJI error code to illustrate the alarms in different directions, namely "8000340E" and "8000340F". But in the actual problem solving At that time, the two causes are the same.

 

 

The above picture is an explanation of the two codes from fuji web. We mainly talk about several related countermeasures:

Replace the feeder, that is, replace the feeder. It is suspected that the XY direction deviation caused by the feeder problem is large. No matter a good feeder or a poor performance, it will not cause a large error in the X direction, especially when the "Auto offset" function is used. When it is turned on, the suction position can be automatically corrected according to the recognition of the image, so the X-direction deviation caused by the feeder is not very common; and because the Feeder stepping ratchet requires a motor and a transmission belt to drive, there is also a drive circuit to control it. A slight abnormality will cause the step distance of the Y square to change, especially when the component size is small, the Y-direction deviation is more likely to occur, and the alarm "8000340F" will be issued.

 

In the first point, in addition to mentioning Feida, there are also problems caused by the suction nozzle. I thought about it. The reasons for the suction nozzle are more common and easy to understand. I will just list it and not explain it more:

 

The suction nozzle is clogged and the vacuum is low.

 

The nozzle rod is plugged and it is not smooth up and down.

 

The nozzle selection is too large and leaks air.

 

The nozzle selection is too small and the suction is insufficient.

 

The actual pressure of the vacuum pump is too small. (Factors related to the suction nozzle)

 

The inside of the shaft is blocked. (Factors related to the nozzle)

 

The spring on the pole is abnormal. (Factors related to the nozzle)

 

If the component camera is abnormal, clean it. When the surface of the camera is dirty or the component falls, which affects the image recognition, the entire module is generally thrown in a large amount of material, which is easy to be found. The probability of a single deviation is still Relatively low. In any case, it is unquestionable to ensure that the component camera is clean.

 

The last and most important point is the parameter tolerance. Under normal circumstances, the Pickup tolerance XY is given based on the size of the body and the nozzle. It not only ensures that the nozzle does not deviate from the component body, but also leaves for the pickup identification. A sufficiently large process window. The following factors need to be considered:

Material packaging is the direct gap between the material and the trough.

The deviation of the advance distance before the feeder.

The difference of different feeders.

The accuracy factor of the head or pole.

NXT display interface: the gap between a 0402 resistor material and the trough.

 

NXT adjusts the interface diagram of the suction position, you can directly input the XY deviation amount, and perform a temporary adjustment of the suction position.