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Adjustment Procedures Results of Improper Adjustment
(2) Adjusting the feed origin
1. Origin of lengthwise feed motor can be adjusted with memory
switch level 2 K15 .
2. Move the feed with or key and adjust so that the distance
from presser 1 to the center of the needle is 2.5±0.3 mm.
3. Loosen setscrews 3 in sensor installing plate 2, move feed
sensor 4 and fix setscrews 3 at the position where the
detecting lamp (built in the sensor) is changed over from ON
to OFF.
4. Return the compensation value to “0” and make the origin
retrieval. Then check again the position of 2.5±0.3 mm.
(Origin retrieval is performed with the temporary stop switch
located on the side of face plate section.)
(Caution) When the position of feed origin is improper,
presser 1 interferes with needle when sewing the
overlapped section. As a result, thread breakage
or needle breakage will be caused.
1) Feed motor origin compensation
1. Press MODE key 4 for approximately three seconds to
enter memory switch level 2 of the adjustment mode.
2. Select K15 with ITEM SELECTION key !0 .
3. When the existing set value is changed with DATA CHANGE
key !1 , origin retrieval is performed and every time the
set value is changed, the feed moves to the position of the set
value.
Set value can be set within the range of -120 to 400. (0.025
mm/1 pulse)
4. Every time STOP button is pressed during setting the origin
compensation value, the move from the position of the existing
compensation value to that of compensation value “0” is
repeated.
5. When the setting item of K15 is changed with ITEM
SELECTION key !0 , the origin compensation value is
memorized in EEPROM of the machine head and the feed
motor origin compensation is completed.
™ Improper position of presser
(improper longitudinal position of
presser arm as well) influences
closing/opening of the needle
thread trimmer.
™ In case the distance from the
needle hole to the presser is
excessively small when the feed
origin is detected, the presser
comes in contact with needle
when sewing the overlapped
section. As a result, thread
breakage or needle breakage
will be caused.
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