Singer Serger Professional 5 Manual

							 
   
  
  
                   
 
                                    
Chapter 4:                      
          Three-Thread Overlock  
      (narrow, wide, and wide with   
             decorative threads) 
 
 
 
 
 
 
 
      
 
                             
 
 
 
 
 
 
 
 
 
                                        
						

							 
  
Three-Thread Overlock (narrow) 
 
The Three-Thread Overlock Stitch is the most commonly used stitch because of  
its versatility.  It provides a wonderful professional seam finish  to woven fabrics.  It is  
beneficial in preventing loosely woven fabri cs from unraveling.  In addition, the  
Three-Thread Overlock Stitch offers unlim ited decorative capabilities.  It is  
recommended for finishing seams but not rein forcing the seam.  Use the conventional 
sewing machine’s straight stitch to reinfo rce the seam.  The stitch uses one overedge  
needles and both the upper  looper and lower looper.  There are 2 different ways to set 
up for a Three-Thread Overlock st itch.  For a more narrow stitch (4.0) select the Right 
Overedge needle; for a wider stitch (6.0)  the Left Overedge needle is used.  
  
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
      
 
 
 
 
 
 
 
 
 
 
             
 
 
 
Upper Looper Thread 
 
Lower Looper Thread 
Right Overedge Needle Thread 
Three-Thread Overlock (narrow) page 1  
						

							 
 
ATD: 
Auto Tension Dial  
          “A” 
Left Cover Stitch 
Needle “C” Unthreaded and 
Remove Needle 
Middle Cover Stitch 
Needle “D” Unthreaded and 
Remove Needle   
Right Cover Stitch 
Needle “E” Unthreaded and 
Remove Needle 
Overedge Left  
Needle “A” Unthreaded and 
Remove Needle     
Overedge Right  
Needle “B” (Blue)     Threaded 
Upper Looper 
(Green)  Looper Engaged 
and Threaded 
Lower Looper 
(Red)      Threaded 
Chain Stitch Looper  
(Brown)    Unthreaded   
Upper Knife       Engaged 
Seam Guide Plate Not Installed, use 
Knife Cover Plate 
Seam Width Dial           “N” 
Stitch Length Dial           “2” 
Presser Foot  
Pressure           “N” 
Differential Feed Dial            “N” 
Stitch Finger           “N” 
Spreader      Not Used 
   Set-up: 
Needle: 
Three-Thread Overlock (narrow) page 2  
						

							 
 
The Three-Thread  Overlock 
makes a great edge finish to a  
garment’s facing. 
  Three-Thread Overlock (narrow) page 3  
						

							 
 
 
 
 
 
 
 
 
 
 
 
 
      
 
                         
 
 
 
 
 
 
 
 
                                 
 
 
 
 
 
 
 
 
 
 
 
  
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
      
 
                         
 
 
 
 
 
 
 
 
                                  
 
 
 
 
 
 
 
 
 
 
 
 
 
 Three-Thread Overlock (narrow) page 4 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
      
 
                         
 
 
 
 
 
 
 
 
                 
                
 
 
 
 
 
 
 
 
 
 
 
  
 
 
 
 
  
 
  
 

						

							 
   
   
 Two-Thread Overedge (narrow) page 7
 
 
  

						

							 
  3. Thread the top cover thread guide by pulling the thread towards the left until 
       it slips under the guide.  Then pu ll the thread along the right side of the  
       button as illustrated.  
 
 
 
 
 
 
 
 
 
 
  4. While holding the thread, firmly  pull the thread between the tension disks. 
 
 
  
 
 
 
 
 
 
 
  5. Turn the handwheel toward you unt il the lower looper extends 5-10mm  
       (approximately ½”) from the needl e plate edge.   
 
  6. Thread the looper area of the ma chine following the green color coded  
       thread guides 4-9. 
 
 
 
 
 
 
 
 
 
 
 
 
 
  
Three-Thread Overlock (narrow) page 8  
						

							 
 7. Thread the hole in the Upper  Looper from front to back k.  Pull about 4  
                 inches of thread through the loope r and place to the back of the  
                 throat plate.