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

Adjusting the tension of the lower thread presser spring

Related Models:
Z-8560B
Adjust the tension of the lower thread presser spring (1) so that the tension is 0.03 to 0.11 N when the lower thread
presser spring (1) is pulling the lower thread (nylon thread: 100D 1 X 3 (Z)) after thread trimming.
1
Remove the knife unit (2).
To learn more, see Related Information.
2
Move the knob (3) to slide out the movable knife
(4), and then hook the thread as shown in the
illustration.
3
Return the movable knife (4) to trim the thread.
4
Measure the tension of the lower thread presser
spring (1) while it is pulling the lower thread.
5
Turn the screw (6) to adjust the tension of the
lower thread presser spring (1) to 0.03 to 0.11 N.
If using a tension gauge (sold separately) to
measure the tension, take the reading from the
scale on the side of the red line.
Related Information
• Replacing the fixed knife and movable knife on page 98
• Points to note when making adjustments on page 103
121