Problem Recommended Solutions
Brush not aggressive enough
• Increase filament diameter and/or grit size
• Increase filament density by using round straight rather than round crimped
• Increase surface contact by using rectangular rather than round
• Increase pressure/depth of interference
• Increase surface speed by increasing spindle RPM
• Use a larger diameter brush
• Reduce trim length or feed rate
Brush too aggressive
• Reduce filament diameter and/or grit size
• Reduce filament density by using round crimped rather than round straight
• Reduce surface contact by using round rather than rectangular
• Reduce pressure/depth of interference
• Reduce surface speed by reducing spindle RPM
• Use a smaller diameter brush
• Increase trim length or feed rate
Brush not conformable enough
• Increase trim length
• Reduce filament diameter
• Reduce filament density by using round crimped rather than round straight or rectangular
• Reduce surface speed by reducing spindle RPM
• Reduce feed rate
Finer final finish required
• Increase surface speed by increasing spindle RPM
• Decrease grit size
• Use brush with a coolant
Coarser final finish required
• Reduce surface speed by reducing spindle RPM
• Increase grit size
• Use brush without a coolant
Filaments melt/smear on workpiece
• Reduce surface speed by reducing spindle RPM
• Use a smaller diameter brush
• Use brush with a coolant
Short brush life
• Increase filament density
• Reduce pressure/depth of interference