Training Workbook: HAPPY HCD-1501 Operation and Maintenance
Education Department
Chapter 2: Machine Setup & Orientation
5
Machine Setup
Control Panel 2
Design Transfer
Proper Machine Setup: Bobbin loading
and Tension check/ adjustment
RE-LOADING THE BOBBIN CORRECTLY
The bobbin will need to be replaced frequently, allowing only 30,000 to 60,000 stitches
per spool. This has to be done correctly every time.
1. Ensure bobbin turns
clockwise. Pull thread
through this slit.
2. Feed thread through
eye at the end of the
tension flap.
3. Pass thread under wire
loop
at the top front of
the bobbin case.
•
The “yo-yo” test
is very exact in checking tension. Perform this quick
check each time you re-load the bobbin. Practice until you are comfortable
doing this.
•
Check bobbin tension frequently
when changing bobbins.
TAKE CARE TO RE-INSERT THE RELOADED BOBBIN CASE FULLY!
Your machine will not sew any stitches unless this is done. At worst, the
needle & needle bar may strike the side of a poorly-inserted bobbin case,
breaking the needle and possibly putting needle depth out of adjustment
for that needle.
CHECKING TENSION
Machine Setup
Make small adjustments
– no more than a ¼ or
½ turn in either
direction before re-
checking tension.
