In the SMT production line involves the machine throwing rate problem. high SMT machine throwing rate seriously affects the production efficiency. If it is within the range of normal values, it is a normal problem, if the throwing rate value of the proportion is relatively high, then there is a problem exists, the production line engineer or operator should immediately stop the line to check the reasons for throwing material, so as not to waste electronic material and affect production capacity.
1. The electronic material itself
If the electronic material itself is ignored in the PMC inspection, and the electronic material flow to the production line to use, may lead to throwing the material higher, because some electronic material in the transportation or handling process may be squeezed and deformation, or the factory itself because of the production of the electronic material problems, then this need to coordinate with the electronic material supplier to solve, send new materials and inspection after passing to the production line to use.
2. SMT Feeder material station is wrong
Some production line is two shifts, some operators may be fatigue or negligence and carelessness and lead to the Feeder material station is wrong, then the pick and place machine will appear a lot of throw material and alarm, this time the operator needs to rush to check, replace the Feeder material station.
3.SMD machine take material position reason
SMD machine placement is relying on the mounting head of the suction nozzle in order to absorb the corresponding material for patching, some throwing material because of the trolley or the reason of the Feeder and lead to the material is not in the suction nozzle position or did not reach the height of the suction, the mounter will false suction, false fitting, there will be a large number of empty paste situation, this must be Feeder calibration or adjust the suction nozzle suction height.
4. Mounter SMT nozzle problems
Some placement machine in a long time of efficient and rapid operation, the suction nozzle will be worn, resulting in the absorption of materials and midway fall or absorb not, will produce a large number of throw material, this situation requires timely maintenance of the placement machine, diligent replacement of the suction nozzle.
5. Mounter negative pressure problem
SMD machine can absorb the component placement, mainly by the internal vacuum to produce negative pressure for absorption and placement, if the vacuum pump or air tube is broken or blocked, will cause the air pressure value is small or insufficient, so that can not absorb the components or in the process of moving the mounting head fall, this situation will also appear throw material increase, this situation requires replacement of air tube or vacuum pump.
6. The placement machine image visual recognition error
SMD machine can be specified components mounted to the specified pad position, mainly thanks to the visual recognition system of the mounter, the visual recognition of the mounter component material number, size, size, and then after the internal machine algorithm of the mounter, the component will be mounted to the specified PCB pad above, if the visual has dust or dust, or damaged, there will be a recognition error and lead to absorb material error, resulting in If there is dust or dirt in the vision or if it is damaged, then there will be an error in recognition which will lead to the wrong material being absorbed, resulting in an increase in throwing material, and this situation will require a replacement vision recognition system.
In summary, these are some of the common causes of material throwing on the placement machine. If your factory is experiencing an increase in material throwing, you will need to check the root cause. You can first ask the site personnel, through the description, and then according to the observation and analysis directly to find the problem, so more effective to find out the problem, to solve, while improving production efficiency
Post time: Dec-17-2022