The removal of solder on the land on a board is very difficult. It is because, it must be high temperature operation such as 240 degrees or more. It probably depends on the special worker with technical skilled. However, If MS5000 is used, probably anyone could be removal of solder with quickly and correctly. The reason could check by the following reports.
MS5000 is the system for removal of solder, However, it is used as easy rework system by the function of high efficient temperature controller. The XY table of MS5000 will be suitable also for reworking.
Solder Cleaning for land of BGA
The vacuum bit for solder remove can be chosen according to the conditions of the board, such as a large size BGA and or small size csp. When reworking, the vacuum bit is for pick-up of the component, such as QFP.
The Board Holder:
Guide pin type board holder---------Clip type board holder
The board holder has two kinds, they are by the guide pin type and by the clip type. And they can be locked on the table with free position.
Top Heater Unit ----------Vacuum Rod
Bottom Heater-----------------Nozzles Hood for top heater
The bottom heater is by hot air type, and it is 50 x 50mm size, and also it has a under support pin. The pin can be set with position free. The top side heating hood can be change. It is changed for the optimal size to the package, when reworking.
When solder cleaning, It is sucked up after melting the solder on the land. The heating control for melting solder is set up on the controller with touched panel. MS5000 has three kinds of heating style as following:
In the case of No.1: The heater temperature of the machine is controlled, thus beforehand, you have to check the temperature to the land. then the temperature of the land does not go up any more.
In the case of No.2: the temperature is controlled by the sensor temperature. in this case, you have to set up the actual temperature of your required. When the sensor is on the land, it will be for top heater control, thus the bottom heater must be set up by on the controller.
Controlled by a sensor
In the case of No.3: The temperature is controlled by the sensors. in this case, you have to set up the actual temperature of your required for each. This is closed control system, you have to set up only actual temperature for solder cleaning and or reworking.
Controller-----------Operation Knob
The heating operation is by operation knob, it is relation moves with the nozzle head. And the range of moves for the nozzle head can be limited by the range adjuster of the machine. Thus, operator will be easy operation.
QFP Pick-up
The operation for reworking is almost same as cleaning, However, the vacuum bit sucks up not solder but the package. In that case, the vacuum ring should be attached to the top of the vacuum bit. It should be change to the size of the package. The vacuum bit may also be able to be pick up if it is a small and light weight package. The nozzle hood should be change of the optimal size to the package. However, probably, it will also be possible to move and heat by the operation knob, even if it is somewhat small. the temperature control in the case of heating is same as the case of cleaning.
Auto bit Cleaning:
Cleaning position for the bit-----------Auto cleaning of the bit
The bit for solder rod will be easy to get it blocked by sucks up solder. Therefore, it have to clean in sometimes. MS5000 has a function of auto cleaning of the Vacuum bit. The heater head is removed to the cleaning position. Then the bit will be automatically cleaning.
1. Nozzle for circular: x 1
2. Nozzle for square x 1
3. Vacuum bit x 1 (inner size 1.5Фmm /outside 3.5Фmm)
4. Vacuum Pad x 3 (6.4Фmm)
5. Clip
type board holder jig x 4
6. Guide pin type board holder jig x 4
1. XY Table
XY Table |
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Monitor & CCD Camera |