JUKI MO-2800 Instruction Manual page 29

Practical Sewing - Overlock
●
Thread tension reference table
Refer to the following reference table for the thread tension.
The thread tension slightly differs with the type of material and thread to be used.
Use thin spun thread up to No.90 (Tex No. 18) for roll hemming.
Use woolly nylon thread only as the upper looper thread.
Thread tension dial
Thread
Polyester spun
Tex No.18
(Japanese system No:90)
Polyester filament
Tex No.12
(Japanese system No:80)
Woolly nylon
Tex No.26
(Only use for Upper Looper )
NOTE: The values marked with (*) are approximate guides for the case of using the roll hemming thread tension lever.
If you adjust the thread tension without using the lever, it will be necessary to increase the thread tension near
to the maximum value.
Thread tension for roll hemming (roll hemming
and narrow overlocking)
●
A
Raise the roll hemming thread tension lever A up to per-
form roll hemming without adjusting the thread tension
dial.
Raise the roll hemming thread tension lever up to obtain
the thread tension that is suited to roll hemming.
Be sure to return the lever to its home position after you
have finished roll hemming.
For roll hemming
Right Upper
needle Looper
thread thread
3-5 3-4
3-5 3-4
- 3-4
Roll hemming thread tension lever
For narrow overlocking
Lower Right
Looper needle
thread thread
3-5 (*) 3-6
3-5 (*) 4-6
- -
Upper Lower
Looper Looper
thread thread
4-6 3-5 (*)
4-5 3-5 (*)
3-4 -
28