Sewing machines are surprisingly delicate pieces of machinery. When the bobbin or needle gets pulled out of timing with the rest of the tool, the machine is useless and becomes a danger when the needle breaks.
In this Instructable I will show you how to adjust the bobbin timing on your machine. For my example I will be using the Handi-Quilter at TechShop San Jose.
You will need:
A pair of thread nippers
A screw driver
A metric hex key set (if your machine happens to use it. It might be all screws)
Step 1: Take it apart
First, remove the needle plate and run the wheel by hand to see where the needle is hitting. This can give you a good idea of which direction you need to rotate the shuttle hook and shuttle race.