JUKI LU-2818-7 User Manual

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When the sewing speed or stitch pitch is changed, the normal- and reverse-feed stitch needle entry points
may not be aligned at the time of automatic reverse feed stitching.
In such a case, correct the alignment of needle entry points by changing the ON/OFF timing of the automatic
reverse feed cylinder.
In the case the stitch pitch is large and correction of the timing is difcult, it is recommended to decrease the
reverse feed sewing speed or use the temporary stop function at each corner section of the sewing pattern.
Refer to
"III-8. Detailed explanation of selection of functions
⑯
Compensation of timing of the sole-
noid for reverse feed stitching" in the Instruction Manual for the SC-922
for detail.
Normal- and reverse-feed stitches may need to be adjusted according to the stitch pitch to be used. Refer to
the Engineer's Manual for how to adjust the stitches.
1) How to align needle entry points of the reverse feed stitching with those of the normal feed stitching
Carry out "correction of the timing of the reverse feed stitching" according to the difference between the
needle entry points of the reverse feed stitching and those of the normal feed stitching.
Refer to
"III-6. Setting the SC-922 functions" in the Instruction Manual for the SC-922
for how to
carry out the "correction of the timing of the reverse feed stitching".
2) Stitch-by-stitch reverse feed stitching speed (Function setting No. 8) and the temporary stop function at
each corner section of the sewing pattern (Function No. 151)
Default value Recommended value Recommended value Recommended value
Stitch pitch (mm) 3 to 6 7 to 8 9 10 to 12
Reverse feed stitching speed (sti/min) 600 500 400 400
Temporary stop function at each
corner section of the sewing pattern
0 (OFF) 0 (OFF) 0 (OFF) 1 (ON)
②
Correction of the OFF-timing of
the reverse feed stitching at the
beginning of sewing (Function
setting No. 52)
③
Correction of the OFF-timing of
the reverse feed stitching at the
end of sewing (Function setting
No. 53)
Sewing starting position
Stitch length
is smaller
Decrease the set
value of No. 51.
Increase the set
value of No. 51.
Decrease the set
value of No. 52.
Increase the set
value of No. 52.
Stitch length is
smaller
Decrease the set
value of No. 53.
Increase the set
value of No. 53.
Stitch length is
smaller
Sewing end
position
①
ON-timing of the reverse feed
stitching at the beginning of sew-
ing (Function setting No. 51)
Stitch length is smaller
Sewing end
position
5-6. Normal-/reverse-feed stitch needle entry points alignment at the time of
automatic reverse feed stitching (LU-2810-7, LU-2860-7, LU-2818-7, LU-2868-7)

JUKI LU-2818-7 Specifications

General

Brand	JUKI
Model	LU-2818-7
Category	Sewing Machine
Language	English