The top part of the sewing machine is the arm. The arm is comprised of all of the parts that drive the needle into the fabric such as the tension regulator, tension disk, thread guides ...

So once upon a time, sewing machines didn’t just do ... [GYOC] decided to make a few more parts before their Tinkercad knowledge faded: a needle adapter with an improved design, some tension ...

RC car servos were installed in the sewing machine and now are solely responsible for controlling, in real time, the horizontal movement of the needle and the amount of stroke of the feed dogs ...