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...

The upper and lower shafts of a sewing machine must work perfectly in parallel or the balance of the machine becomes unstable. If the...

The parabolic adjustment involves properly aligning the cam gear to the upper shaft gear. As the cam gear is turned, the linkage of...

Observe the dance of the needle as it moves from side to side. This graceful pattern must remain precise and consistent. The needle...