Table of Contents
Advertisement
Machine head
3.11 Setting the thread tension spring
FIg. 52: Setting the thread tension spring
(1) - Screw
(2) - Socket
Proper setting
The thread tensioning springs need to keep the needle threads under
tension until the needle tips plunge into the sewing material.
If the needle threads are slack when the needles plunge into the sewing
material, the needles may prick the threads when moving down.
To check the thread tension, slowly turn the handwheel forward while
observing the thread tensioning springs at the moment of puncture.
To set the spring travel:
1. Loosen the screw (1).
2. Turn the regulator (3) to set the spring travel.
3. Tighten the screw (1).
To set the thread tension:
1. Loosen the screw (1).
2. Turn the socket (2).
3. Tighten the screw (1).
Service Instructions 745-35-10 B/745-35-10 F - 00.0 - 10/2017
①
• Increase the thread tension: turn clockwise
• Reduce the thread tension: turn counterclockwise
③
②
(3) - Regulator
63
Advertisement
Table of Contents
