JUKI MB-1373 Engineer's Manual page 19

Adjustment Procedure
(Caution) Make sure that the machine is at the stop-motion
position (see 2.-(10) Adjusting the stop-motion position)
before carrying out the adjustment of the quick-change
mechanism.
1. Measure the space between holes in a button (in mm). In the case
of 4-holed buttons, the lengthwise feed amount and crosswise feed
amount should be set at the same scale on the graduated plate.
[For MB-1373]
Lengthwise feed scale
For 2-holed buttons, while keeping lengthwise feed adjusting lever
pressed down, set the spring at "0" on the graduated plate. For 4-holed
buttons, the spring should be set as described below according to the
stitch shape to be employed:
Crosswise feed scale
Loosen nut . Set portion
to the space between the measured holes. Then, tighten nut
[For MB-1377]
Lengthwise feed scale
For 2-holed buttons, while keeping lengthwise feed adjusting lever
pressed down, set the spring to "0" on the graduated plate. For 4-holed
buttons, the spring should be set as described below according to the
stitch shape to be employed:
X-shape stitching: Set the spring at the scale, within range A,
corresponding to the space between the measured
holes.
U-shape stitching: Set the spring at the scale, within range B,
corresponding to the space between the measured
holes.
(Caution) If the spring is set at scale position C (outside the setting
range of the scales), not only can sewing not be
performed, but sewing troubles can also occur. Never
set the feed adjusting lever at the position of scale C.
Crosswise feed scale
Loosen nut . Set portion
to the space between the measured holes. Then, tighten nut
(Caution) Check to be sure that the needle enters exactly the
center of each hole in the button before operating the
machine.
of pointer to the scale corresponding
A
of pointer to the scale corresponding
A
.
.
– 15 –
Results of Improper Adjustment