JUKI AMS-221EN Series Engineer's Manual page 25

Adjustment Procedures
1. Start the test mode I10.
2. Step on the start pedal to perform the origin search.
3. Press the button on the panel 3 times.
4. Set the needle bar in its lowermost position.
5. Loosen the setscrew
intermediate presser
Tighten the setscrew
6. Step on the start pedal to perform the origin search.
7. Press the button on the panel 2 times .
8. Set the needle bar in its lowermost position.
9. Confirm that the rise of intermediate presser is 3.5 ± 0.2mm. If the
requirement of 3.5 ± 0.2mm is not met, loosen the setscrews
positions) of the sensor slit
After that, repeat the same process from 2.
Reference: The intermediate presser lowers when the sensor slit
is turned in Direction A.
The intermediate presser rises when the sensor slit
Direction B.
10. Examine the conditions specified below.
• Press the X key after the completion of origin search to withdraw
from the Test Mode I10. Start the Test Mode I10 again (no origin
search) and press the "+" key 5 times. When the power supply is
turned off after that, the intermediate presser cam
• Press the X key after the completion of origin search to withdraw
from the Test Mode I10. Start the Test Mode I10 again (no origin
search) and press the "–" key 3 times. When the power supply is
turned off after that, the intermediate presser cam
This process is finished when the above-mentioned conditions have
been satisfied.
Otherwise, loosen the setscrews
gear and move the bevel gear in Direction C. Turn the
intermediate presser lifting shaft
of one gear tooth to move the drive bevel gear
Adjust the first screw of the setscrews
bevel gear to the flat side of the variable shaft
that, repeat the same process from 2.
(Caution) Start origin search after confirming that the slit of the
sensor slit
prevent the breakage of the sensor
of the intermediate presser
come in contact with the throat plate
again. (0mm adjustment)
and slightly turn the sensor slit
(2 positions) of the drive bevel
in Direction A or B by the amount
(2 positions) of the drive
settles in the center of the sensor
and let this
.
(2
.
is turned in
shall not rotate.
shall not rotate.
in Direction D.
and fix it. After
to
.
– 21 –
Results of Improper Adjustment
o There will be a displacement
between the variable value of the
intermediate presser lower
position and the panel setup
value.
o If there is no cam follower in the
parallel section of the intermedi-
ate presser cam at the time of
origin retrieval, stepping out may
occur in the intermediate presser
motor, thus causing defective
stitches, generation of sound from
the face plate section, and de-
struction of parts.
o If adjustments of backlash are in-
sufficient for the drive bevel gear
, stepping out may occur in the
intermediate presser motor, thus
causing defective stitches, gen-
eration of sound from the face
plate section, and destruction of
parts.