Drilling is an important process in PCB process. It looks simple, but actually it is very critical process.
and many reasons can cause the defective drilling, machine,human,drill bit, backup board,entry etc....
Today,we will Analysis the factors cause the drill bit broken
|Drill bit broken||Spindle run-out too big||Check and repair the spindle or change a new spindle|
|Drill bit broken||Improper operation when drilling||
Check if the air pipe of the presure foot cup block
adjust the pressure foot cup pressure according to the drill bit
check if there is any cooper wire inside the collet
Check the parallelism and stability of drilling table
|Drill bit broken||density of the backup board problemtest||Test the density of the backup board.use high density backup board|
|Drill bit broken||
There are sundries between the board
|When nailing board, clean the debris between the board|
|Drill bit broken||drill bit not suitable||choose the suitable drill bit for different board|
|Drill bit broken||The speed of the drill is insufficient and the feed rate is too high||
Select the appropriate feeding and reduce the feed rate
|Drill bit broken||There are too many layers||Reduce to an appropriate number of layers|
|Drill bit broken||Drill bit grinding too much or the drilling life is exceeded||Controlled the grinding times ,normally not more than 5 times|
|Drill bit broken||entry cockle,backup board Bending||Select suitable surface hardness, flat entry and backup board|
|Drill bit broken||The centerness of the welding drill tip is deviated from the center of the drill shank||use the the overall tungsten carbide drill bit|
From this form ,we know you should chose the suitable drill bit, backup board, Al entry and use the right way to make sure
your drilling preocess running smoothly .