Czech machine card line fault how to repair?

Czech sewing machine in the process of using more or less will encounter some problems for the novice, such as in the Czech Republic on the machine card line problem, then how do we address this fault repair and deal with it?

     Failure occurs card line problem may be as follows:

     1, may be the head clamp, spring is too tight or too loose.

     2, the shuttle put screws too tight or too loose.

     3, there is dirt inside the needle plate.

     Solutions are as follows:

     1, open the needle plate, and remove the bobbin cover, spindle bed, bobbin, wipe with a cloth, and then the crude feed duck feathers brushing teeth in the dirt, drops of oil run

     2, adjust the tightness of the spring to make a smooth, natural pull out

     3, adjust the shuttle put screws.

     In the prevention of this type of card line problem, the sewing machine business in the Czech Republic there is a method: First, in the order specified threading, not wearing the wrong; second, the thickness of the bottom surface of the wire to be consistent.