Needle Bar Adjustments

The needle is the most important part on the sewing machine, but the position and movement of the bar to which it connects controls the needle. How many adjustments are needed on the needle bar to insure proper performance?

1.) Needle bar height; 2.) Needle Place Centering Front to Back; 3.) Needle Plate Centering Left to Right; 4.) Extreme of left to right zig zag; 5.) Hook to Needle Clearance.