Jack JK-T781E Series - Adjust Needle and Hook (Method 1)

First way：see the no. of 2 in the first picture, put the ruler like this between the Needle
plate and needle bar，move the position of needle bar until the distance between needle
bar and the ruler is 0. Adjust the hook to make the tip of the hook from the upper end of
the pinhole 1.6 ~ 1.8mm, tighten the screw of Rotary hooks to make that the distance
between two Tips of the hook is about 0.05 mm.
ruler, this part 14.2mm
1.2 adjust needle and hook
1.6~1.8mm
0.05mm
requirement for catching
thread