Singer 20U-109 Instruction Manual - Page 9
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Zigzag Sewing Machine Instruction Manual and Parts List 2.3. Motor, Motor Pulley and V-Belt Specifications • HP (400W) 4-pole (medium speed) clutch motor • M type v-belt 20U-109 / 109C 2,500 2,000 1,800 1,500 Table 2 - Machine Speed vs. Motor Pulley Diameter Machine Speed [sprnj 20U-112 ; 112C 2,000 1,800 1,500 20U-309 2,500 2,000 1,800 1,500 Motor Pulley Diameter [mm] 50 Hz 60 Hz 130 105 105 85 90 75 80 65 2.4_ Relationship betwaeo Zigzag Bight and Maximum Speed Table 3 - Relationship between zigzag bight and maximum speed Machine Class Zigzag bight Max. speed 20U-109 / 109C / 309 0 - 5.0 mm 5.0 - 9.0 mm 2,500 rpm 2,000 rpm 20U-112 / 112C 0 - 5.0 mm 5.0 - 12.0 mm 2,000 rpm 1,800 rpm - 8 -
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Zigzag
Sewing
Machine
Instruction
Manual
and
Parts
List
2.3.
Motor,
Motor
Pulley
and
V
-Belt
Specifications
•
HP
(400W)
4
-pole
(medium
speed)
clutch
motor
•
M
type
v
-belt
Table
2
—
Machine
Speed
vs.
Motor
Pulley
Diameter
Machine
Speed
[sprnj
Motor
Pulley
Diameter
[mm]
20U-109
/
109C
20U-112
;
112C
20U-309
50
Hz
60
Hz
2,500
-
2,500
130
105
2,000
2,000
2,000
105
85
1,800
1,800
1,800
90
75
1,500
1,500
1,500
80
65
2.4_
Relationship
betwaeo
Zigzag
Bight
and
Maximum
Speed
Table
3
-
Relationship
between
zigzag
bight
and
maximum
speed
Machine
Class
20U-109
/
109C
/
309
20U-112
/
112C
Zigzag
bight
0
-
5.0
mm
5.0
-
9.0
mm
0
-
5.0
mm
5.0
-
12.0
mm
Max.
speed
2,500
rpm
2,000
rpm
2,000
rpm
1,800
rpm
-
8
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