Adjusting The Thread Tension Spring - Brother Z-8550B Instruction Manual

Adjusting the thread tension spring

• The standard position of the thread tension spring is 5 to 8 mm above the surface of the thread guide when the
presser foot is lowered.
• The standard tension of the thread tension spring is 0.25 to 0.30 N.
Adjusting the position of the thread tension spring
1
Lower the presser foot (2).
2
Loosen the set screw (4).
3
Turn the thread tension bracket (5) to adjust the
position of the thread tension spring (1).
4
Securely tighten the set screw (4).
Adjusting the tension of the thread tension spring
5
Press the upper thread slightly above the thread
tension bracket (5) with a finger to stop the thread
spooling out.
6
Pull the upper thread down until the thread tension
spring (1) starts to move down, and measure he
tension of the thread tension spring (1) at this
point.
7
Insert the tip of a screwdriver into the groove in the
thread tension stud (6) and turn it to adjust the
tension of the thread tension spring (1).
If using a tension gauge (7) (sold separately) to
measure the tension, take the reading from the
scale on the side of the red line.
Related Information
• Points to note when making adjustments on page 103
106