JUKI DDL-8000A Engineer's Manual page 111

Direct-drive, high-speed, automatic thread trimmer
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⑥ How to balance stitches for [Bar Tacking] (Function setting Nos. P32, P33)
Example) Step 1: Setting stitch number for Bar-Tacking A = B = 4 and turns of Bar-Tacking D = 4
Step 2: Sewing the pattern in normal speed.
Step 3: If unbalanced situation is appeared please correct it as below:
Start point
A
B
Start point
A
Start point
A
Start point
A
⑦ Reverse revolution to lift the needle after thread trimming (Function setting No. P46)
This function is used to make the sewing machine rotate in the reverse direction after thread trimming to
lift the needle bar almost to highest position.
Use this function when the needle appears under the presser foot and it is likely to make scratches on the
sewing products of heavy-weight material or the like.
P 4 6
ON
OFF Function of making the sewing machine rotate in the reverse direction to lift the
(Cautions) The needle bar is raised, by rotating the machine in the reverse direction, almost to
the highest dead point. This may result in slip-off of the needle thread. It is therefore
necessary to adjust the length of thread remaining after thread trimming properly.
Case 1 : Longer A and shorter B
Adjustment : [P32] Decrease the set value.
 
 
A
B
D
B
Case 2 : Shorter A and normal B
A
 
Adjustment : [P32] Increase the set value.
B
 
D
B
Case 3 : Normal A and longer B
 
Adjustment :[P33] Decrease the set value.
A
B
 
D
Case 4 : Normal A and shorter B
B
 
Adjustment : [P33] Increase the set value.
 
B
A
D
Function of making the sewing machine rotate in the reverse direction to lift the
needle after thread trimming is provided.
needle after thread trimming is not provided.
A becomes shorter and B becomes longer.
C becomes longer and D becomes shorter.
B becomes shorter.
B becomes longer.
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