Joy Technology Co.,Limited

Analysis on the causes of smt nozzle absorb mistake 

In the daily operation if you encounter a patch machine suction nozzle when we learn how to deal with it? The following analysis of the reasons for the wrong smt nozzle.

1. Vacuum negative pressure, when the nozzle to take the component, the nozzle at a certain negative pressure, the components adsorbed on the nozzle, the nozzle to pick up the components are unusual use of negative pressure detection mode, when the negative pressure sensor When the detection value is within a certain range, the machine thinks that the suction is normal, otherwise it thinks that the drawing is bad.When the component sucks, the vacuum negative pressure should be above 53.33kPa so as to have enough vacuum to absorb the component.If the vacuum negative pressure is insufficient, Can not provide enough suction to absorb the components, in use, we should always check the vacuum negative pressure, and regularly clean the nozzle, but also pay attention to each placement of the vacuum filter on the head of the pollution, its role is to reach the nozzle Of the gas source to filter, to be black to be replaced, to ensure the smooth flow of air.

2. The incoming problem, some manufacturers produce chip components packaging quality problems, such as large spacing between the teeth, tape and plastic film between the sticky is too large, too small trough size is caused by components Not possible reasons.

3, the impact of the feeder, the feeder feed bad (feeder gear damage), material hole is not stuck in the feeder on the gear, the feeder below the foreign body, card spring wear), pressure Cover plate, spring and other operating mechanism to produce deformation, rust, etc., resulting in components sucking, standing or sucking device, it should be regularly checked, to deal with, so as to avoid a large number of device waste.


4. Draw a high degree of impact, the ideal suction height is the suction nozzle contact with the surface of the component and then down the pressure 0.05mm, if the pressure of the depth is too large, it will cause the components are pressed into the trough but can not afford material . If the absorption of an element is not good, may be appropriate to raise the height of a little upward adjustment, for example, 0.05mm. The author in the actual work process has encountered a material on all the components have a bad situation, The solution is to adjust the height of the material in the system parameters.

5. Sucker wear, nozzle deformation, clogging, damage caused by insufficient air pressure, resulting in the absorption of components, so to regularly check the degree of wear of the nozzle, the serious to be replaced.