In the production line of SMT, the most important concern is often how to control production costs and improve production efficiency. This involves the problem of the SMT machine throwing rate. The high rate of SMD machine throwing material seriously affects the SMT 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, then 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, the following to discuss with you
1. The electronic material itself problem
If the electronic material itself is ignored in the PMC inspection, and electronic material flow to the production line 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 production causes 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 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 throwing material and alarm, then the operator needs to rush to check, replace the feeder material station.
3. Pick and place machine takes the material position reason
The mounter placement is relying on the mounter head suction nozzle in order to absorb the corresponding material for patching, some throwing material is because of the reason of the cart or the Feeder and cause the material is not in the position of the suction nozzle or does not reach the height of the suction, the mounter will be false suction, false fitting, there will be a lot of empty paste situation, this must be Feeder calibration or adjust the suction nozzle suction height.
4. Mounter nozzle problems
Some placement machine in a long time of efficient and rapid operation, the nozzle will be subject to wear, 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 nozzle.
5. Mounter negative pressure problem
The mounter can absorb the component placement, mainly relies on the internal vacuum to produce the negative pressure to absorb and placement, if the vacuum pump or the air tube is broken or blocked, it will cause the air pressure value is small or insufficient, thus can’t absorb the component or in the process of moving the mounter head to fall, this situation will also appear throw material increase, this situation needs to replace the air tube or vacuum pump.
6. The placement machine image visual recognition error
The mounter can mount the specified component 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 recognition error and lead to absorb material error, which leads to If the vision has dust or dirt, or is damaged, there will be recognition error and lead to the wrong material absorption, thus leading to the increase of throwing material, this situation needs to replace the vision recognition system.
In summary, is the common reasons for the chip machine throwing material, if your factory has increased throwing material, you need to check the corresponding to find the root cause. Can first ask the field personnel, through the description, and then according to the observation and analysis directly to find the problem, so that more effectively identify the problem, to solve, while improving production efficiency.
Post time: Nov-10-2022