– 5 –
❸
❸
❷
Within 0.3 mm
❸
1. Fix the throat plate auxiliary
cover
❸
so that is higher than
the throat plate
❷
(within 0.3
mm). When it is lower than
the throat plate
❷
, needle
breakage or the like due to the
defective feed will be caused.
2. Confirm by putting a ruler or
the like that the throat plate
auxiliary cover
❸
is horizon-
tally installed. If not, throat
plate auxiliary cover
❸
and
lower plate
❶
come in contact
partially with each other, and
abnormal worn-out will be
caused.
❸
❼
❷
❶
[When using area 3020 (AMS-221F
△△
3020)]
1) Move the cloth feed base to the rear,
and place throat plate auxiliary cover
(asm.)
❸
from between lower plate
❶
and throat plate
❷
. At this time,
be careful not to bend or damage
lower plate
❶
.
2)
Temporarily fix throat plate auxiliary
cover (asm.)
❸
with throat plate auxil-
iary cover setscrew
❺
and washer
❹
.
3) Temporarily fix throat plate auxiliary
cover (asm.)
❸
to the machine bed
with throat plate auxiliary cover sup-
port setscrews
❻
(10 pcs.).
4) Fix throat plate auxiliary cover (asm.)
❸
to the machine bed with two
counter-sunk screws
❼
.
5) Referring to the precautions, adjust
the position of the throat plate aux-
iliary cover and tighten setscrews
❺
and
❻
. If it is difficult to properly
position the throat plate auxiliary cov-
er, loosen throat plate auxiliary cover
setscrew
❺
and throat plate auxiliary
cover base setscrews
❾
once, and
correctly adjust the position of the
throat plate auxiliary cover.
❶
❼
❹
❺
❻
❾