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CONTENTS 

 
 

1. Adjusting the amount of front-to-back movement   

on the top feed dog 

1-1 To adjust amount of front-to-back movement (stitch length) 

on the top feed dog in relation to the main feed dog  ················· 1 

1-2 To adjust the clearance between the top feed dog 

and the main feed dog  ························································· 2 

1-3 To adjust the top feed dog pressure  ······································· 2 

2. Adjusting the top feed dog front to back 

································ 3

 

3. Adjust the top feed dog stroke 

·············································· 3

 

4. Adjusting the standard position of the top feed dog 

··············· 4

 

5. Adjusting the top feed dog timing 

········································· 6

 

 

 

Summary of Contents for MZ1103/UF

Page 1: ...INSTRUCTION Industrial Sewing Machines WX8803 UF RX9803 UF MZ1103 UF First published May 1999 No 990038 ...

Page 2: ...ck to make sure the pulley cover safety cover etc are secured 3 Before adjusting cleaning threading the machine or replacing the needle be sure to turn off the power 4 Never start the machine with no oil in the reservoir 5 Refer to the parts list of each model as well as this instruction manual before performing preventive maintenance 6 The contents described in this instruction manual are subject...

Page 3: ...the top feed dog in relation to the main feed dog 1 1 2 To adjust the clearance between the top feed dog and the main feed dog 2 1 3 To adjust the top feed dog pressure 2 2 Adjusting the top feed dog front to back 3 3 Adjust the top feed dog stroke 3 4 Adjusting the standard position of the top feed dog 4 5 Adjusting the top feed dog timing 6 ...

Page 4: ...o back in the rear fixed mode F FRONT The top feed dog moves front to back in the front fixed mode In the case of C or B Adjust the amount of front to back movement with symbols on scale and mark on adjusting guide In the case of F Adjust the amount of front to back movement with symbols on scale and mark on adjusting guide To increase the amount turn knob clockwise To decrease the amount turn kno...

Page 5: ...og and the main feed dog when plain stitching is performed Adjustment is made by loosening set screw on the top feed dog 1 3 To adjust the top feed dog pressure The pressure should be as light as possible yet be sufficient to obtain the proper stitch formation and feed the fabric see the illustration To increase the pressure loosen lock nut and turn adjustment screw clockwise To decrease the press...

Page 6: ...d of each slot on the presser foot Adjustment is made by tightening set screw on front to back lever 3 ADJUST THE TOP FEED DOG STROKE To obtain a stroke of 4 7mm remove the cover loosen nut move rod pin up or down and then align the center of rod pin with alignment mark on the center of the up and down shaft driven lever To decrease the stroke move up rod pin min 3 5mm To increase the stroke move ...

Page 7: ...plyshifting during sewing 1 C CENTER The top feed dog moves in the divided in half mode This machine is factory set in this mode 2 B BACK The top feed dog moves in the rear fixed mode 3 F FRONT The top feed dog moves in the front fixed mode Follow the precautions below before changing the standard position 1 Bring the top feed dog to the extreme rear end of its travel 2 Do not loosen screw on fron...

Page 8: ...ing outside eccentric set screw Align inscription B on middle eccentric with mark Y by turning only middle eccentric 90 clockwise Then tighten middle eccentric set screw B To change from C CENTER to F FRONT 1 Loosen outside eccentric set screw first Align the V shaped groove on outside eccentric with mark Y by turning outside eccentric and middle eccentric counterclockwise 2 Secure outside eccentr...

Page 9: ...follow procedure No C Then change C CENTER to F FRONT follow procedure No B F To change from F FRONT to B BACK Change F FRONT to C CENTER first follow procedure No D Then change C CENTER to B BACK follow procedure No A 6 Note When turning the middle or outside eccentric during Nos 1 to 6 procedures be sure to keep the top feed dog from contact with the slots on the presser foot 5 ADJUSTING THE TOP...

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