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The machine is factory-set at C. 
The V-shaped groove on outside eccentric 

  and inscription C on middle eccentric 

 are 

aligned with mark X. 

To change the standard position, follow the procedures below by referring to the 
illustrations as seen from the machine pulley. 

A.

 

To change from C (CENTER) to B (BACK) 

1).

 

Loosen outside eccentric set screw 

 first.  Align the V-shaped groove on 

outside eccentric 

 with mark X by turning outside eccentric 

 and middle 

eccentric 

 counterclockwise. 

2).

 

Secure outside eccentric 

  by tightening 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 eccentric 

  by tightening outside eccentric set screw 

Align inscription F on middle eccentric 

 with mark Y by turning only middle 

eccentric 

 90

°

counterclockwise.    Then tighten middle eccentric set screw 

 

 
 

< Note > 

Do not tighten excessively outside eccentric set screw 

 and middle eccentric set 

screw 

  (torque them to 15kg

 cm). 

 
 
 

 

5

Summary of Contents for UF Series

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

Page 2: ...k 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 o...

Page 3: ...he 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 f...

Page 4: ...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 ad...

Page 5: ...g 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 possi...

Page 6: ...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 pi...

Page 7: ...lyshifting 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...

Page 8: ...ng 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...

Page 9: ...ollow 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 foll...

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