Filter
Top Products
PREPARATION
PREPARATION
20
SETTING THE UNDER THREAD
1. Orient the bobbin (1) with its thread facing in the direction, specified by the arrow symbol, and put it in the bobbin
case (2).
2. Route the thread through the thread groove (3) in the bobbin case, under the thread tension spring (4) and the
thread guard (5).
3. Raise the "lever" (6) on the bobbin case and then install it in the rotary hook.
NOTE: The standard under thread tension is 25 to 30 g (0.25 to 0.3 N) for the carbonized yarn #120.
The thread tension can be adjusted with the tension adjusting screw of the bobbin case. Turning the screw
clockwise tightens the thread and turning it counterclockwise loosens the thread tension.
For adjustment, suspend three 25-cent coins from the bobbin case by taping them to the thread as shown in
the illustration below. If thread is pulled out slightly when the bobbin case is gently shaken up and down, the
thread tension is between 25 and 30 g (0.25 and 0.3 N).
CAUTION
Before setting or removing the bobbin, be sure to turn OFF the power switch.
Otherwise, the embroidery machine may start causing injury of operators.
Thread groove (3)
Tension adjusting screw
Bobbin case (2)
Lever (6)
Thread guard (5)
Tension spring (4)
Bobbin (1)
!