Motors

Power of a motor

The power of your sewing machine motor is typically printed on the label. On old motors you often see 40W or 50W, on modern ones it's 90W or 110W. Have they doubled in power? No, this is the weird case where 90 is smaller than 50... This is a label from a domestic sewing motor… Continue reading Power of a motor

Horizontal oscillating hook · Horizontal rotary hook · Vertical oscillating hook · Vertical rotary hook · Zig-zag mechanics · Zig-zag timing

Zig-zag hooks and their strengths and weaknesses

All zig-zag machines that I've got, are round bobbin. I know of one transverse shuttle zig-zag machine: it is by Seidel & Neumann, see http://www.naehmaschine-antik.de. Round bobbin hooks can be classified like this: rotary versus oscillating, vertical versus horizontal, side-facing versus front-facing. Rotary and oscillating hooks have very similar performance characteristics when the other two… Continue reading Zig-zag hooks and their strengths and weaknesses

Tension adjustment

Tension adjustment for the unafraid

A lot of people are intimidated by the necessity to adjust thread tension on their sewing machine. Yet, as every sewing machine manual tells you, both bobbin and upper tension need to be checked and adjusted for every project, sometimes several times during the project, because these settings depend on many factors, such as the… Continue reading Tension adjustment for the unafraid