Setting the thread tension spring
84
Service Instructions 755 A/756 A - 00.0 - 02/2019
11 Setting the thread tension spring
Fig. 87: Setting the thread tension spring
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 stop
:
1. Loosen the screw (1).
2. Turn the regulator (3) to set the spring stop.
3. Tighten the screw (1).
To set the
thread tension
:
1. Loosen the screw (1).
2. Turn the socket (2).
• Increase the thread tension: turn clockwise
• Reduce the thread tension: turn counterclockwise
3. Tighten the screw (1).
(1)
- Screw
(2)
- Socket
(3)
- Regulator
①
②
③
Summary of Contents for 755 A
Page 1: ...755 A 756 A Service Instructions...
Page 8: ...Table of Contents 6 Service Instructions 755 A 756 A 00 0 02 2019...
Page 12: ...About these instructions 10 Service Instructions 755 A 756 A 00 0 02 2019...
Page 116: ...Folder 114 Service Instructions 755 A 756 A 00 0 02 2019...
Page 124: ...Transport carriage 122 Service Instructions 755 A 756 A 00 0 02 2019...
Page 138: ...Transport clamps 136 Service Instructions 755 A 756 A 00 0 02 2019...
Page 200: ...Light barriers 198 Service Instructions 755 A 756 A 00 0 02 2019...
Page 222: ...Endless zipper feed optional 220 Service Instructions 755 A 756 A 00 0 02 2019...
Page 238: ...Additional equipment 236 Service Instructions 755 A 756 A 00 0 02 2019...
Page 266: ...Stacker 264 Service Instructions 755 A 756 A 00 0 02 2019...
Page 438: ...Programming 436 Service Instructions 755 A 756 A 00 0 02 2019...
Page 450: ...Decommissioning 448 Service Instructions 755 A 756 A 00 0 02 2019...
Page 452: ...Disposal 450 Service Instructions 755 A 756 A 00 0 02 2019...
Page 472: ...Technical data 470 Service Instructions 755 A 756 A 00 0 02 2019...
Page 496: ...Appendix 494 Service Instructions 755 A 756 A 00 0 02 2019...
Page 497: ......