Grinding the flats


There are two possibilities, namely grinding in the card by installing the grinding roller on the machine for a short time under normal production conditions, or grinding the flats in a special grinding machine after removing them from the card. This machine comprises mainly a full-width grinding roller with moveable carriages mounted over it to receive 1 - 4  flats. During grinding, the carriages move the flats repeatedly back and forth over the grinding roller until they have been ground down to the precisely set height. Each of these two methods has its advantages and disadvantages. Grinding on the card is more efficient and demands significantly less effort; grinding in a flat grinding machine is somewhat more exact. It may prove advantageous to grind as often as possible on the card, but occasionally to put the flats on a flat grinding machine to level up.