p
11
—
—
rotection 1 without being displaced.
looping stroke position the hook tip is at the level of
th
eedle against hook protection 1 manually. The needle should not touch the
dle and feed mechanism timing
tion
west position. Then adjust so that the needle and the feed dog do not move even when the reverse lever
r cover 1.
ent dial to the maximum
settin
rn the lower feed cam 3 gradually until it is at the position where the needle and the feed dog do not
mov
oved up and down.
n
the feed adjustment dials to the minimum settings. Then adjust as follows so that the feed dog 1 is at
its highest position (0.5mm above the top of the needle plate 2) when the needle bar is at its lowest position.
a. Loosen the two screws 3
b. Turn the machine pulley to set the needle bar to its lowest position.
c. Turn feed cam 4 to align the point 5 of feed cam 4 with the centerline of feed rod 6
Move needle in looping stroke position by pulley. In
e middle of the needle. Press n
hook tip.
21)
Adjusting the nee
(1) Horizontal feed direc
Set the feed adjustment dials to the maximum settings. Then turn the machine pulley until the needle bar is
at its lo
is moved up and down at this time.
a. Remove the bed uppe
b. Set the feed adjustm
gs.
c. Loosen the two screws 2.
d. Turn the machine pulley until the needle bar
is at its lowest position.
e. Tu
e even when the reverse lever is m
f. Tighten the two screws 2.
(2) Vertical feed directio
Set
Summary of Contents for GC20688-BDC
Page 24: ...A ARM BED MECHANISM 21...
Page 28: ...B THREAD TENSION REGULATOR MECHANISM 25...
Page 31: ...C NEEDLE BAR AND THREAD TAKE UP MECHANISM 28...
Page 34: ...D PRESSER FOOT MECHANISM 31...
Page 37: ...E UPPER FEED LIFTING ROCK SHAFT MECHANISM 34...
Page 40: ...F STITCH REGULATOR MECHANISM 37...
Page 43: ...G FEEDING AND FEED LIFTING HOOK SHAFT MECHANISM 40...
Page 46: ...H HOOK SADDLE MECHANISM 43...
Page 50: ...I OIL LUBRICATION MECHANISM 47...
Page 53: ...J ACCESSORIES 50...
Page 55: ...K PNEUMATIC CONTROL MECHANISM 52...
Page 57: ...L KNIFFE MECHANISM 54...
