Hook It
There are two types of hooks in sewing machines: Oscillating and Rotary. Below is a picture of a common oscillating hook. Notice its...
Needle Bar Height
The needle bar must be adjusted to the correct height to enable the needle to be positioned for the hook. Loop lift is the position of...
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...
Upper Shaft Balance
The upper and lower shafts of a sewing machine must work perfectly in parallel or the balance of the machine becomes unstable. If the...
Find the Collar
The parabolic adjustment involves properly aligning the cam gear to the upper shaft gear. As the cam gear is turned, the linkage of...
Parabola - Dance of The Needle
Observe the dance of the needle as it moves from side to side. This graceful pattern must remain precise and consistent. The needle...
Cam Gear - Stitch Formation
For over a century, home sewing machines only did straight stitch sewing, but in 1952 zig zag machines came home. To form zig zag...
Mechanical Sewing Machines
How do mechanical sewing machines form different stitches? By definition, a mechanical sewing machine forms stitches using gears and...
MOTOR BURN
When an AC motor is sluggish due to carbon buildup, a motor burn may restore the motor to its prior speed and power. The idea is to run...
Sluggish Motor?
If you find a sewing machine motor that seems tired - lacks pep and vitality - is slow to turn; the armature may be gummed up with carbon....
