−17 −
13) Top feed cam timing
◯In case of LU-1508, LU1508H, LU1510
14) Feed movement
Ⅰ . Amount of alternate vertical movement of walking foot and presser foot
◯ In case of the machine
without thread trimmer
①
⑤
⑥
②
③
④
①
②
③
④
Fig. 27
Fig. 28
Setscrew No. 1
Standard
• Lower engraved marker line on top feed rear arm
③ is aligned with the center of hinge screw ④ .
Standard of the amount of alternate vertical
movement of walking foot and presser foot
• Upper engraved marker line : Approx. 5 mm
• Intermediate engraved marker line : Approx. 4 mm
• Lower engraved marker line : Approx. 3 mm
● Sewing speed table
• In case of LU-1510 and LU-1508
• In case of LU-1510-7
Amount of alternate vertical
movement of walking foot and
presser foot
Less than 3 mm
3 mm to less than 4 mm
4 mm to less than 6.5 mm
Stitch length : 6 mm or less
2,500 rpm
2,000 rpm
1,600 rpm
Stitch length : More than 6
mm to 9 mm or less
2,000 rpm
2,000 rpm
1,600 rpm
Amount of alternate vertical
movement of walking foot and
presser foot
Less than 2.5 mm
2.5 to less than 4 mm
4 mm to less than 4.75 mm
4.75 mm to less than 6.5 mm
Stitch length : 6 mm or less
3,000 rpm
2,400 rpm
2,000 rpm
1,800 rpm
Stitch length : More than 6
mm to 9 mm or less
2,000 rpm
2,000 rpm
2,000 rpm
1,800 rpm
• In case of LU-1508H
Amount of alternate vertical
movement of walking foot and
presser foot
Less than 4 mm
4 mm to less than 6.5 mm
Stitch length : 6 mm or less
2,000 rpm
1,600 rpm
Stitch length : More than 6
mm to 10 mm or less
1,600 rpm
1,600 rpm
Lower engraved
marker line
Hinge screw
Conditions
• Feed amount : 0 mm
• Amount of alternate vertical
movement : Standard
• When the needle comes down.
Main shaft
To align
Standard Adjustment
Top feed cam rod
◯In case of LU-1510-7
Main shaft
Fig. 29
Screw No. 1
Top feed cam rod
Fig. 30
①
⑤
Fig. 31
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