– 10 –
(4) Crank balancer positioning
Standard Adjustment
[Rotating direction]
When the needle bar
lowers and the clearance between the needle bar connecting
and the needle bar
bushing, lower
is 4.6mm, the two set screws
of the crank balancer
assume the horizontal condition.
[Axial direction]
Keep the close contact with the main shaft eccentric cam
and the crank balancer
.
A
B
4.6mm
(5) Lower shaft backlash adjustment and connection/disconnection
Standard Adjustment
1. Size of lower shaft backlash is 0.1mm at the tip of the driver
. The shaft is required to rotate smoothly.
2. Define the stop position of the lower shaft
so that the set screw
settles almost in the center of the flat
section
of the lower shaft
.
0.1mm or less
Face A
C
Summary of Contents for LK-1900A
Page 20: ... 16 10 Hook adjustment Standard Adjustment 0mm 0mm 7 5mm 0 05 0 1mm For DPX5 For DPX17 ...
Page 90: ... 86 Grease Grease Grease Grease Grease 8 Needle thread clamp mechanism area ...
Page 91: ... 87 Grease Grease A Grease Grease Grease Grease 9 LK 1901A relations ...
Page 92: ... 88 10 LK 1903A relations Grease Grease ...
Page 114: ... 111 12 Circuit diagrams 1 Block diagram A ...
Page 115: ... 112 2 Power supply circuit diagram A ...
Page 116: ... 113 3 Power supply circuit diagram B ...
Page 117: ... 114 4 Power supply circuit diagram C ...
Page 118: ... 115 5 Servo motor circuit diagram ...
Page 119: ... 116 6 Sensor pedal VR circuit diagram ...
Page 120: ... 117 7 MAIN PANEL board circuit diagram ...
Page 121: ... 118 8 Motor solenoid circuit diagram Thread trimmer Lifting the work clamp foot motor ...