Joy Technology Co.,Limited

To understand the main reason of the drop material during the SMT production process, how to control production costs and improve production efficiency, Joysmt specialist and engineers are very concerned about things, and these with the placement machine Drop material rate has a great relationship , The following talk about the placement of the drop material problem.
Drop material refers to the placement machine in the production of species, the material is not posted after the paste, but the material thrown into the throw box or other places, or did not absorb the material and the implementation of a Drop material action. In order to optimize the production efficiency and reduce the cost, it is necessary to solve the problem of the high rate of the drop material. In order to optimize the production efficiency and reduce the cost, it is necessary to solve the problem of high drop of material.

Drop material of the main reasons and solutions:
Cause 1) nozzle problem, nozzle deformation, plugging, damage caused by insufficient pressure, leakage, resulting in suction can not afford, take material is not correct, but pass the material.
Solution: Clean the nozzle.

Reason 2) Identify system problems, poor vision, visual or laser lens is not clean, there are debris interference recognition, identify the light source selection and strength, grayscale enough, there may be bad system to identify the system.
Solution: Clean the wipe to identify the surface of the system, keep clean and debris free, adjust the light intensity, grayscale, replace the identification system components.

Reason 3) the location of the problem, the material is not in the center of the material, the height of the material is not correct (generally encountered after the parts under the pressure 0.05MM prevail) caused by offset, take material is not correct, with the corresponding identification Of the data parameters are not identified and identified as invalid material abandoned.
Solution: adjust the reclaim location.

Cause 4) Vacuum problem, lack of air pressure, the vacuum pipe channel is not smooth, there are plugging the vacuum channel, or vacuum leakage caused by insufficient pressure and can not afford to take or after the drop in the way to paste.
Solution: adjust the gas pressure steep slope to the equipment required pressure (such as 0.5 ~ ~ 0.6Mpa - YAMAHA placement machine), clean air pressure pipe, repair leakage gas path.

Cause 5) program problems, the editor of the program parameters of the parameters of the wrong set, with the material to the physical size, brightness and other parameters do not match the identification caused by being discarded.
Solution: modify the component parameters, search for the best component parameter settings.

Reason 6) incoming problems, incoming irregular, for the pin oxidation and other substandard products.
Solution: IQC do a good job testing, contact with the component suppliers.

Cause 7) Feeder problem, the feeder position is deformed, the feeder is fed badly (the feeder ratchet gear is damaged, the material hole is not caught on the ratchet gear of the feeder, there is foreign body under the feeder. Aging, or electrical malpractice), resulting in lack of material or poor material and Drop material, as well as feeder damage.
Solution: Feeder adjust, clean the feeder platform, replace the bad parts or feeder.

There are Drop material phenomenon to be resolved, you can ask the scene staff, through the description, and then according to the observation and analysis directly to find the problem, so more effective to identify the problem, to solve, while improving production efficiency, but more occupied machine production time