viii
CONTENTS
1. SPECIFICATION ............................................................................................................1
2. NAMES OF MAJOR PARTS ..........................................................................................2
3. INSTALLATION ..............................................................................................................3
4. LUBRICATION AND DRAINAGE .................................................................................. 6
5. THREADING ..................................................................................................................9
6. ADJUSTING THE THREAD TENSION ........................................................................ 12
7. REPLACE THE NEEDLE ............................................................................................. 13
8. ADJUSTING THE STITCH LENGTH ...........................................................................14
9. ADJUSTING THE DIFFERENTIAL FEED RATIO ....................................................... 14
10. REPLACE THE KNIVES .............................................................................................. 15
11. ADJUSTING THE OVEREDGE WIDTH ....................................................................... 16
12. ADJUSTING THE NEEDLE HEIGHT ..........................................................................16
13. ADJUSTING THE PRESSER FOOT ...........................................................................17
14. ADJUSTING THE FEED DOG ..................................................................................... 19
15. THE RELATIONSHIP BETWEEN THE NEEDLE AND THE LOOPER ....................... 20
16. ADJUSTING THE AMOUNT OF TRAVEL OF THE DOUBLE CHAINSTITCH LOOP-
ER ................................................................................................................................. 22
17. MAINTENANCE ...........................................................................................................23
18. DIMENSIONS USE TO ADJUSTING THE LOOPER AND THE NEEDLE GUARD .... 24
19. DIMENSIONS RELATED TO THE POSITION OF THE THREAD TAKE-UP AND
THE LOOPER THREAD CAM (STANDARD ADJUSTMENT) .................................... 25
20. TABLE DRAWING ....................................................................................................... 27