Owner's Manual

6. USING THE SEWING MACHINE (SEWING OPERATION)

RH-9820

6-3. Adjusting the thread tension

The thread tension needs to be adjusted in accordance with the articles being sewn.

[Reference thread tensions]

Material

Woollen material

(2 layers) + padding

Denim (3 layers)

Thread used #30 synthetic thread #50 spun thread

Needle DO x 558 Nm90 DO x 558 Nm110

Upper thread tension (N) 0.6 1.0

Lower thread tension (N) 0.3 0.3

Thread take-up spring tension (N) 0.05 0.07

Thread take-up spring stroke (mm) 8 8

* The upper thread tension given above is the tension when the upper thread is pulled out from the thread

path hole of the thread take-up lever, and the lower thread tension is when the lower thread is pulled out

from the needle hole in the throat plate.

1. Adjust by turning the tension nut (1).

2. Turn the tension nut (2) (sub tension) to adjust so that the

upper thread trailing length is about 35 mm.

* When the tension nut (2) is turned clockwise, the

upper thread trailing length will decrease, and when it

is turned counterclockwise, the length will increase.

Adjust by turning the tension nut (3).

0442B

Increase Decrease

0443B

Increase

Decrease