How to choose rework station BGA

BGA Rework Process Introduction 
1 Introduction 
Defects are caused by many reasons during soldering SMD components as empty soldering, short circuit and others, so repair is necessary. The rework process is simple for common SMD, resistor, capacitor, SOIC, SOJ, PLCC and others. With small alignment are more and more in electronic products, lots of BGA, CSP, QFP and others are more and more, so rework stations become good helpers for operators. 
2 How to Choose Rework Station 
Main differences of rework stations are heat source and heat mode; Take example only upper heat or upper and lower both heating, some can set temperature curve. Considering protecting components, the upper and lower both heating system are better. To prevent PCB warping during repairing, preheat function in the rework system is better. PCB fix, BGA position and others are important consideration. 
3 Rework process 
1) BGA disassemble 
Remove BGA chip with rework system and clean solder residue on PCB with solder iron to make solder pad flat; clean and remove flux residue with special cleaner. 
2) BGA dry
Please check all BGA chips dry or damp; put damp BGA components into dry box to dry. 
3) Print solder paste
Print solder paste on disassemble location before soldering BGA; small and special BGA stencil is necessary because there are other components on the board; Thickness and size of stencils are decided by BGA ball diameter and distance. 
For CSP whose ball diameter is <0.4mm, operators can cover flux on PCB solder pad directly. 
4) Mount BGA chips
Set rework program and put dry BGA into preparation location; rework system will take it automatically and then place it into soldering location. 
5) Solder 
Set soldering temperature according BGA size, PCB thickness and others; then rework station will complete soldering process. 
Take BGA rework station from Zhuomao as example, more support is Shenzhen Zhuomao Technology Co.,Ltd.

www.seamarkzm.com

How to choose the BGA rework station ?
With the extensive application of BGA chip in computer motherboards , mobile phones, webcams, memory, television, communication products and other fields , bga rework station demand is also growing. Some friends who own repair shops often ask how to choose a suitable BGA rework station .
Although bga rework station price has been reduced to be acceptable, but bga rework station , after all, is an infrastructure investment, we should buy a useful and practical one.
Here we give some suggestions: .

Choose a good bga rework station , should mainly from the following point of view :
1. what you need.
Regular motherboards size determines the bottom preheating area of bga rework station, generally speaking, ordinary laptop and computer motherboard sizes are smaller than 370x400mm.
2. should know the maximum and minimum size of the soldered chip the size of the chip.Normally vendors will provide four top air nozzle, your largest and smallest chip size determines the size of the optional air nozzle .
3. The main power supply cable size generally are 2.5m2, repair shop in selecting the best bga rework station power not more than 5000W,.
4. The bga rework station should have the following features:
A. three temperature zones are necessary, including the top heating, bottom heating , infrared preheating zone. Two heating zones products available include only the head and infrared preheating zone heating , welding success rate is very low
B. the upper and lower heating head can be moved up and down, Its one of the essential functions bga rework station . When welding by a relatively large motherboards , the bottom nozzle will help to support, to ensure no deformation.
C. with intelligence curve setting function, to set the temperature curve is the most important aspect. If bga rework station temperature curve is set incorrectly, the success rate is very low. You can now appeared on the market a product of intelligent set temperature curve : Zhuomao ZM-R5860, temperature curve is very convenient.

ZHUOMAO ZM-R5860C

ZHUOMAO ZM-R5860C Hot Air BGA Rework Station for sale.

Features:

1)This ZM-R5860C bga rework machine Choose imported high-precision K-type thermocouple, closed loop control and automatic temperature compensation system, combined PLC module for the precision control of temperature.

2)ZM-R5860C has 3 independent heating areas from top to bottom. The 1st and 2nd are hot-air heaters, the 3rd is IR preheating, temperature controlled within ±3 °; Top heater can be adjusted freely, second heater can be adjusted up and down, top and bottom temperature can control many groups and sections of temperature parameters, at the same time the third IR heater can be adjusted the power consumption.

3)ZM-5860C BGA Rework Station use a V-groove equipped with a flexible fixture for PCB positioning to protect the PCB from deformation when heated or cooled, and it suitable for all kinds of BGA repair.

4)ZM-R5860C BGA Rework Station is high definition touch screen (Taiwan) , PCL control, it can save multiple groups profile, password protection and modify function, and can save multiple groups profile, equipped with instant temperature curve analysis function.

5)ZM-R5860C applies linear slide which makes X, Y, Z axis all can do micro adjust or rapid positioning with higher precision within ± 0.01MM, it is very easy to operate.

6)ZM-R5860C has powerful cross-flow fan,it can cool the PCB board rapidly,also built-in vacuum pump and external vacuum suction pen, can pick up the chips rapidly.

7)ZM-R5860C BGA Rework Station offers all kinds of air nozzle and it can realize 360 degree rotation, it is easy to install and replace, customized is available.Bottom IR heater ensure an even heat for PCB board.

8)This BGA machine is CCD vision system, accurate judgments on the melting process during the BGA soldering and desoldering, provide critical vision.

9)ZM-5860C BGA Rework Machine acquired CE certificate, it designed with emergency stop and Automatic power-off protection device when abnormal accident happens, and have double over-heating protection control.

10)Compared with ZM-R5860 BGA rework station,ZM-R5860C designed with a camera and displayer,it is more convenient.