Carbon Brush Appearance
B1-BRANCH FORMATION DUE TO EXTRANEOUS DUST
B2-REDUCED BY DUST GROOVES
B3-BREAKAGE DUE TO OSCILLATIONS
CARBON BRUSH – TOP SURFACE – WORKING IN OF THE PRESSURE PIECE
B4-SMOOTH THROUGH PURELY MECHANICAL WORKING IN
CARBON BRUSH – TOP SURFACE – WORKING IN OF THE PRESSURE PIECE
B5- BURNT DUE TO ADDITIONAL CURRENT CONDUCTION AND SPARKING
B6-MECHANICAL STEP FORMATION
B7-SIMULTANEOUS BREAKING-UP OF THE SURFACE DUE TO CURRENT FLOW
B8-SIDE VIEW OF B6 & B7 (left)
