FALKENRICH - Service (Source of fault analysis)

Source of fault analysis in the mechanical treatment of circuit boards with non-woven roller brushes

Nature of fault	Cause of fault - machine	Cause of fault - roller brush	Remedy of fault
The markings are running diagonally to the running direction	Damaged bearings Jamming of the work piece feed	Unbalanced rollers through incorrect operation	Maintenance of the brushing machine Take off the brush and/or send it off for strip threading
The panels are only brushed on one side in the direction of the feed	The roller brush is not aligned parallel to the counter pressure roller	The roller brushes are possibly not round or conical	Take off the brush and/or send it off for strip threading
Longitudinal lines on the PCB's	Faulty rinsing unit The conveyor and/or counter pressure rolls are dirty	The roller brushes are blocked with residues Damaged roller surface	Repair the rinsing unit, if necessary get it serviced and properly adjusted Clean the machine Send off the rollers for strip threading or remove them Adjust the oscillation
The boards are only brushed in parts	Incorrect contact pressure	The brushes are too hard	Adjust the contact pressure Select appropriate brushes
The burr was not removed	Incorrect contact pressure Incorrect feed Incorrect rotation direction of the brushes	The brushes are too soft Incorrect abrasion	Select appropriate brushes Adjust the abrasion Adjust the rotation direction Adjust the feed Adjust the contact pressure
The burr partially comes to a halt	Rinsing unit is not correctly adjusted	The brush is blocked	Take off the brush or send it off for strip threading
The burr is pressed into the bore / secondary burring	The rinsing unit is not correctly adjusted Incorrect contact pressure Feed too fast	Blocked brush The brush is too soft	Repair the rinsing unit and adjust properly Adjust the contact pressure Adjust the feed Take off the brush and/or send it off for strip threading Select the appropriate brush
The drill hole edge is very rounded	Incorrect contact pressure Feed too slow	The brush is too soft Incorrect abrasion	Adjust the contact pressure Adjust the feed Select the appropriate brush
The drill hole is ovalised	See above	See above	See above
Problems with the adhesion undercut	The rinsing unit is incorrectly adjusted or damaged	Incorrect abrasion	Select the correct abrasion
Blocked bores	The rinsing unit is incorrectly adjusted or damaged Defect filtration Poor water quality	High brush grinding effect Loosened particles are too big Irregular grinding effect	Repair the rinsing unit and the filtration and adjust properly Use filtered water Select the appropriate brush à Falke long life-DEBU-impregnation Have the step turned
Thin inside layer Bending of edges	Incorrect contact pressure Incorrect rotation direction of the rollers	The brush is too hard	Select the appropriate brush Adjust the rotation direction Adjust the contact pressure
Damaged multi layers Only partial brushing of the surface	Incorrect pressure Incorrect feed	The brush is too hard	Select the appropriate brush Adjust the contact pressure Adjust the feed
The press panels are not properly cleaned	The rinsing unit is incorrectly adjusted or damaged	The brush is blocked or full of glass	Select the appropriate brush (23 MA 06 and/or 24 MA 06) Take off the brush and/or send it off for strip threading

Brushes with recessed edges have the following advantages:


		No damaging of the billy rolls

		100% transferring of brush pressure on the PCBs

		Avoiding of residues from the board

		Indicated by a "T + mm" in the product designation, e.g. 23 MS 07 T 15

We recommend following adjustment of your water supply in your brushing machine: