Reasons of uneven surface of the work piece and solution:
Overfeeding: reduce feeding speed, especially at fine polishing speed;
Burning of work piece: try to use suitable grit and hardness
Remaining inner tense of work piece: eliminate inner strength before fine grinding
Smudgy electromagnetic clamp: clean electromagnetic clamp before fine grinding
Imposition of grinding wheel spindle: readjust the spindle and make it parallel with the working table.
Reasons of scratch on the surface of the work piece and solution:
Unclean cooling fuel: clean cooling sink or change cooling fuel
Soft grinding wheel: change to hard grinding wheel
Coarse grit: change to suitable grit
Dressing: check dressing equipment
Reasons chatter mark and solutions:
Main spindle wearing: check main spindle
Wobbling of grinding wheel: re-dressing of the grinding wheel and re-install
Grinding wheel is too hard: change to soft grinding wheel
