Machine head
43
Service Instructions 911-211 - 02.0 - 10/2016
4.5
Setting the bobbin case lifter
Fig. 30: Setting the bobbin case lifter
The hook pulls the needle thread through between the nose of the bobbin
case (3) and the middle section holder (4).
The bobbin case lifter (2) now pushes the bobbin case (1) away so that a
gap appears for the thread.
If the hook tip is located below the bobbin case lifter, the bobbin case lifter
must open so that the thread can also slide past in that position.
So that the thread can slip through without a problem, the width of the lift-
ing gap and the timing of opening have to be set.
Disturbances caused by an incorrect setting:
• Thread breaking
• Formation of loops on the bottom side of the seam
• Loud machine noise
(1)
- Bobbin case
(2)
- Bobbin case lifter
(3)
- Nose of the bobbin case
(4)
- Middle section holder
③
④
①
②
Summary of Contents for 911-211
Page 1: ...Service Instructions 911 211...
Page 6: ...Table of Contents 5 Service Instructions 911 211 02 0 10 2016...
Page 10: ...About these instructions 9 Service Instructions 911 211 02 0 10 2016...
Page 90: ...Sewing unit 89 Service Instructions 911 211 02 0 10 2016...
Page 146: ...Creating programs with DA CAD 5000 145 Service Instructions 911 211 02 0 10 2016...
Page 158: ...Decommissioning 157 Service Instructions 911 211 02 0 10 2016...
Page 160: ...Disposal 159 Service Instructions 911 211 02 0 10 2016...
Page 170: ...Technical data 169 Service Instructions 911 211 02 0 10 2016...
Page 195: ...Appendix Service Instructions 911 211 02 0 10 2016 194...
Page 197: ...Appendix Service Instructions 911 211 02 0 10 2016 196 13 3 Pneumatic diagram...
Page 199: ......