JUKI AMS-221EN Series, Руководство инженера

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1. Turn OFF the power after stopping the thread trimming, or turn ON
the threading switch and lower the intermediate presser .
(Caution) As for the height of needle when adjusting the wiper
, set the height when the sewing machine stopped af-
ter trimming the thread actually.
2. In the state of the above item 2. , loosen setscrew and adjust the
clearance toward the tip of the needle, the clearance toward the in-
termediate presser
, and the opening angle (15˚ to 20˚). Then tighten
setscrew .
3. In the state of the above item 2. , adjust the clearances between the
wiper and needle tip and between the wiper and intermediate
presser after loosening the setscrew . Then, adjust the opening
angle (15 ° to 20 ° ) and tighten the setscrew .
4. Push wiper link section
A
to the last and loosen setscrew .
5. In the state of the above item 4. , adjust the longitudinal (10 mm) and
lateral positions of the wiper . Then tighten setscrew .
(Caution) After the modification of the needle bar height, needle
size (boldness), and intermediate presser height, adjust
the wiper
, without fail.
* Length of the needle can change according to the
needle tip shape and needle size (boldness).
o If the clearance between the wiper
and needle is too small, the
wiper comes in contact with the
needle
due to uneven stop
position of the main shaft, causing
needle breakage.
o If the clearance between the wiper
and needle is excessive,
the wiper comes in contact with
the intermediate presser
and
the wiper will damage the inter-
mediate presser
. Also, the in-
termediate presser can not go
up. (intermediate presser step-
out)
o If a clearance of 10 mm between
the inside of V letter of the wiper
and the center of needle is
mistakenly set, the wiper fails to
spread the thread.
o Similarly, If the center of needle
does not align with the V letter of
the wiper
, the wiper fails to
spread the thread.
o If the opening angle of the wiper
is excessive, thread sweeping
failure will occur.
Adjustment Procedures Results of Improper Adjustment