3/15/18 Sewing Machine Bobbin Case

Identifiers

Date/Time: 3/15/18 midnight

Equipment: Singer heavy-duty sewing machine

Collaborators:

  • Christian Joseph (diagnosis)
  • Jake Lee (writeup)

Images Album: https://imgur.com/LDGJyFS

Relevant Terms

  • The bobbin holds thread under the bed of the sewing machine.
  • The bobbin case holds the bobbin under the bed, and spins along with the rest of the mechanism.

Symptoms

  • When sewing, the thread is chewed and stitching is inconsistent.
  • Manually turning the wheel is rough and inconsistent.

Diagnosis

  • Taking bed panel off and inspecting the mechanism actions make it clear that the bobbin case is not spinning as it should.
  • The needle pokes into the plastic of the bobbin case, resulting in chewed thread.
  • The bobbin case needs to spin consistently for the stitches to be formed correctly.

Solution

  • The bobbin case will be replaced.

https://www.amazon.com/NGOSEW-Quality-Bobbin-Ambition-Q6A0764000/dp/B01HW25SE6

Updates

  • The entire sewing machine was replaced due to additional issues with the action.

Figures

Figure 1