Feed Amount - JUKI Sewing Machine Instruction Manual

5-4 Feed amount

The explanation is given for the feed amount of the sewing machine.
2
1
a
Pitch setting screen
B
Sewing screen
Feed amount on the operation consists of the three
kinds of feed amounts, bottom feed amount (pitch),
main feed amount (pitch + shirring amount) and
auxiliary feed amount (pitch + shirring amount +
shirring amount for auxiliary feed).
In case of a, when pitch (S04) is set to 2.0, bottom
3
feed belt 1 moves 2.0 mm per rotation of the sewing
machine (1 stitch).
In case of B, when shirring amount is set to 3, main
feed belt 2 moves 2.3 mm per rotation of the sewing
machine ( 1 stitch).
This means that set value "1" of shirring amount (main
feed) is in steps of 0.1 mm and when the set value
is converted to mm, 3 x 0.1 = 0.3 mm is calculated.
This value is added to pitch (bottom feed) and the
total value becomes the moving amount of the main
feed belt.
In case of C, when shirring amount for auxiliary feed
is set to 2, auxiliary feed belt 3 moves 2.5 mm per
rotation of the sewing machine (1 stitch).
This means that set value "1" of shirring amount for
auxiliary feed (auxiliary feed) is in steps of 0.1 mm
and when the set value is converted to mm, 2 x 0.1 =
0.2 mm is calculated. This value is added to the main
feed amount and the total value becomes the moving
amount of the auxiliary belt.
C
20
–
Main feed amount = pitch + shirring amount
2.3 mm = 2.0 mm + 0.3 mm
Auxiliary feed amount = main feed amount +
2.5 mm = 2.3 mm + 0.2 mm
–
shirring amount for
auxiliary feed