Adjusting The Feed Timing; Motor Pulleys And Belts - JUKI DDL-8100e Instruction Manual

21. aDJustInG tHE FEED tIMInG

WarnInG :
to avoid possible personal injury due to abrupt start of the machine, turn off the power to the
machine and check to be sure that the motor has totally stopped rotating in prior.
1
2
3

22. Motor PuLLEYs anD BELts

1) A clutch motor with 400W output (1/2 HP) is used as the standard motor.
2) An M-type V belt should be used.
3) The relatonshp between the motor pulleys, belt lengths and sewng speeds s shown n the followng
table :
Motor pulley
Motor pulley part no.
o.D. (mm)
110 MTKP0105000
105 MTKP0100000
100 MTKP0095000
95 MTKP0090000
90 MTKP0085000
85 MTKP0080000
80 MTKP0075000
75 MTKP0070000
70 MTKP0065000
* the effective diameter of a motor pulley is equivalent to the outside diameter minus 5 mm.
* the motor should rotate counterclockwise as observed from the handwheel side. Be careful
not to allow the motor to rotate in the reverse direction.
) Loosen screws 2 and 3 n feed eccentrc cam 1 ,
standard feed timing
2) For the standard adjustment, adjust so that the
advanced feed
timing
3) To advance the feed tmng n order to prevent
Delayed feed timing
4) To delay the feed timing in order to increase stitch
sewing speed (sti/min)
50 Hz
4,440
4,250
4,000
3,820
3,610
3,390
3,160
2,950
2,740
– 2 –
move the feed eccentrc cam n the drecton of
the arrow or opposte drecton of the arrow, and
firmly tighten the screws.
top surface of feed dog and the top end of needle
eyelet are flush wth the top surface of throat
plate when the feed dog descends below the
throat plate.
uneven materal feed, move the feed eccentrc
cam n the drecton of the arrow.
tghtness, move the feed eccentrc cam n the op-
poste drecton from the arrow.
Be careful not to move the feed eccen-
tric cam too far,or else needle break-
age may result.
Belt length
60 Hz
- 1092 mm (43")
-
-
1067 mm (42")
-
4,320
4,000
3,790
1041 mm (41")
3,520
3,260
Belt part no.
MTJVM004300
MTJVM004200
MTJVM004100