A Brief Discussion on how to deal with SMT solder paste printing offset?

inSMTIn the processSolder pastePrinting is an extremely important process. If the solder paste printer has a printing deviation, it is very likely to cause a large amount of solder to be applied, affecting the quality of the finished product and causing economic losses. Now, the solder paste manufacturer will share how to deal with the printing deviation of the solder paste printer?

SMTThe main reasons for deviations in solder paste printing are usually:

1If the positioning points are not accurately identified, it will cause deviations in solder paste printing.

2Due to incorrect coordinates, the solder paste printing has shifted, and the coordinate positions need to be adjusted.

3. If the camera touchesPCBThis causes the solder paste printing to shift, and the camera cover plate must be locked in the system.

4The steel mesh is loosely fixed.

5,CBThe board was not clamped tightly and became loose or shifted during the printing process.

6The ribbon cable is loose and the connection is unstable.

1Image processing technology can be used for inspectionMARKThe recognition effect of a point can be judged by whether the recognition center is accurately locatedMARKThe center of the point, when the score is relatively high, is generally at500Score above.

2Check the width of the conveyor belt. The width of the track should not be too wide. If it's too widePCBIt won't hold tightly and will become loose during the printing process, causing the printing to shift.

3Check if the laser mesh plate is fixed properly. You can try to give it a gentle push.

4CheckBACKUPPINSystem ortop PINWhether it is installed correctly. If not, you can delete all the tops PINThen reinstall.

5,PCBWhether the thickness setting is appropriate and meets the requirements.

6Check whether the clamping device of the steel mesh deviation correction system is normal (it should be confirmed in the self-diagnosis).

7ChecknextmovecardCheck if the connecting wires between the control box are loose or damaged. Reconnect or replace the connecting wires as needed.

8Check whether the front bearing of the motor is worn or defective. If any abnormality is found, replace it in time.

9Check whether there are any abnormalities in the system software or the hard disk.