Singer S0100 User manual

SERVICE MANUAL
104 73 97-26
11 Sept - 2020
©2020 VSM GROUP AB -All rights reserved.
S0100
S0105

2 S0100 / S0105 104 73 97-26
Contents
Cover Removal..............................................................................................................................3
Setting of cams..............................................................................................................................6
1. Needle bar height ......................................................................................................................8
2. Needle plate sideways...............................................................................................................9
3. Height of lower looper..............................................................................................................10
4. Clearance between lower looper and needle ........................................................................11
- End position of lower looper .................................................................................................11
5. Timing of lower looper and needle..........................................................................................12
6. Clearance between lower looper and needles........................................................................13
7. Upper looper retainer bracket .................................................................................................14
8. Setting of upper looper in relation to the needle .....................................................................15
9. Timing of upper looper and lower looper .................................................................................16
10.Clearance between upper looper and lower looper................................................................17
11.Feed dog height......................................................................................................................18
12.Feed timing.............................................................................................................................19
13.Position of the lower knife.......................................................................................................20
14.Position of upper knife against the lower knife .......................................................................21
15.Clearance between rear needle support and needle .............................................................22
16.Clearance between Front needle support and needle ...........................................................23
17. Thread height ........................................................................................................................24
18. Presser foot height ................................................................................................................25
19 . Stitch width finger .................................................................................................................26
20. Motor belt tension..................................................................................................................27
21. Lengths movement of feed dog in needle plate slot..............................................................28
22. Stitch lengths.........................................................................................................................29

104 73 97-26 S0100 / S0105 3
Cover Removal
1. Remove the light cover srew (A).
2. Remove the light cover by pressing down and to the
left.
4. To remove the differential feed adjusting lever knob
(B) pull it to the right.
5. Remove the motor cover
screw(C) from the side of the
machine.
6. Remove the (D) Screw from the
base of the machine.
7. When removing the motor cover
also unhook the two hooks (E)
from the back cover.
8. Remove the two top screws (F) of the top cover.
9.To remove it lift the top cover up.
A
0.7
1.0
2.0
B
C
D
E
F

4 S0100 / S0105 104 73 97-26
11. Remove the screw (G) that holds the LED-
light.
Disconnect LED-light and remove it.
12. Loosen the four screws (H) on the left and right
side.
13. Remove the screw (I) located under the looper
cover.
14.Remove the front cover. N
H
H
G
H

104 73 97-26 S0100 / S0105 5
15. Remove the the screw that holds the thread
undwinder (J).
16. Remove the two screws (K) on the cylinder
cover.
Remove the cylinder cover
17. When removing the cylinder cover unhook the
hooks ((L)
18. Remove the back cover screw (M).
Remove the back cover.
19. Remove the four screws (O).
Remove the motorcover screw (P).
Remove the two safty swyítch screws
(Q).
J
M
O
Q
P
K
L

6 S0100 / S0105 104 73 97-26
Setting of cams
This is checked to make sure so the cams are in its basic position.
Final setting of the each cam position is done when each individual setting has been perfor-
med.
1. To check the setting of the cams, remove the base plate first.
2. For easier check also remove the hand wheel.
3. Set #1 point - the counter weight mark and fastening pin, so there are lined up against
the (B) screw on the casting. See illustration above.
4. The # 2 Cam - The Feed cam.
It should now be position so its first set screw (a) is lining up
against the (B) screw on the casting.
NOTE! The lower shaft has a flat spot where the Cam # 2's first
screw (a) always must be positioned on.
5. The # 3 Cam - The Needle bar eccentric cam.
It should now be position so its first set screw (a)
is lining up against the (B) screw on the casting.
NOTE! The lower shaft has a flat spot where the
Cam # 3's first screw (a) always must be positio-
ned on.
#1 point - Pin In arm shaft and mark in counter weight
# 2 Cam - The Feed cam.
# 3 Cam - The Needle bar eccentric cam.
#4 Cam - Upper looper cam.
# 5 Cam - Lower looper cam.
# 6 Cam - Feed lifting cam.
A
B
1
2
3
4
5
6
a
X
Y
b
Y
a
X

104 73 97-26 S0100 / S0105 7
6. Turn the hand wheel in the sewing direc-
tion, so #1 point and Cam #2' first screw (a) is
straight to the front (Y- direction)
7. The #4 Cam - Upper looper cam.
It should now be positioned so the centre posi-
tion between the set screws (b) and (c) is accor-
ding to the illustration (X- direction) .
8. The #2 Feed cam should remain in the same
position.
9. The # 5 Cam - Lower looper cam.
It should now be positioned so its first screw (b)
is according to the illustration (X-direction).
10. Turn the handwheel in sewing direction to Set #1 point - the counter weight mark and
fastening pin, so they are lined up against the (B) screw on the casting.
11. The # 6 Cam - Feed lifting cam.
It should now be positioned so its first screw (b) is accor-
ding to the illustration (X-direction).
When setting the Feed lifting cam, set it so there is a clea-
rance of 0.2~0.5 mm between it and the feed bar (D).
NOTE! Final setting of the each cam position is done when the individual setting is perfor-
med.
X = Top
Y = Front
X
YY
aa
b
X
YY
a
b
X
X
Y
0.2~0.5 mm
D

8 S0100 / S0105 104 73 97-26
1. Needle bar height
Check
1. Inset a new needle size 90 System EL x 705 in the machine.
2. Set the needle to it's highest turning position.
3. The distance between the right needle and the surface of the needle plate shall now be
9.8 ± 0.1 mm
NOTE: Check and make sure the needle is inserted fully into the needle clamp.
Adjustment
1. Remove light cover.
2. Remove presser foot.
3. Remove Cylinder Cover.
4. Remove LED-light socket (E).
5. Inset a new needle size 90 System EL x 705.
6. Move needle by turning the handwheel so it comes to it's highest turning position.
7. Loosen screw (A) holding the needle bar. Move needle bar (B) until the distance between
the right needle () and the surface of the stitch plate is 9.8 mm.
8.Tighten screw.
ATTENTION! If needle bar is twisted, clearance between lower looper and needles may
differ.
9.8 ± 0.1 mm
A
B
E

104 73 97-26 S0100 / S0105 9
2. Needle plate sideways
Check
When the needles enters the needleplate hole the distance on both sides of the needle
should be equal.
Adjustment
1. Loosen up the two screws (A) and (B) that holds needle plate.
2. Move the needle plate so it becomes equal distance on both sides of the needle.
A

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3. Height of lower looper
Check
The distance (A) between the centre of the looper shaft and tip of the looper
should be 66.3 mm
Adjustment
1. Turn the handwheel so the lower looper comes to its most right position.
2. Loosen up the lower looper screw (B).
3. Move the looper (C) up or down until the distance between the centre of the looper shaft
and tip of the looper is 66,3 mm.
4. Tighten the screw (B).
5. Check " Timing of lower looper and needle"
A
B
C

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4. Clearance between lower looper and needle
- End position of lower looper
Check
When lower looper is positioned at end of left side, the clearance between its point and left
side of RIGHT (A-Needle) needle should be 3.8 mm.
Adjustment
1. Move lower looper to its left end position by turning the handwheel towards you.
2. Loosen screw (A) of the lever of the lower looper. Adjust distance between
left side of the right needle (A-Needle) and the point of the lower looper to 3.8 mm.
3. Tighten screw (A).
3.8 mm
A
B
A

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5. Timing of lower looper and needle
Check
When lower looper is aligned with left side face of RIGHT hand needle (A-needle) , the
needle should have travelled 4.2 mm upwards (C) from its lowest position.
A = 4.2 mm.
Adjustment
1. Remove the LEFT needle and set the needle bar to its lowest position.
2. Put setting gauge on needle bar with a 4.2 mm distance washer between tool and body.
3. Remove distance washer and move needle upwards by means of handwheel until
setting tool touches body.
4. Loosen the two screws (B) in cam of lower looper. Align point of lower looper with left
side face of RIGHT hand needle.
5. Tighten screws.
6. Re-check.
A
B
A
B
C
B

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6. Clearance between lower looper and needles
CHECK
When the point of lower looper is behind the needle it must be a clearance of 0 - 0.03 mm
(A) between needles and lower looper.
ADJUSTMENT
ATTENTION! Before adjusting, make sure that timing of lower looper is correct and that the
needle bar isn’t twisted, because then the clearance between lower looper and needles may
differ.
1. Set point of lower looper behind centre line of the needle by turning the handwheel
towards you.
2. Loosen the lower looper shaft bushing screw (B) and adjust clearance between needle
and point of looper by moving looper shaft (C) until it is 0 - 0.03 mm.
4. Tighten the screw (C).
A
C
B

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7. Upper looper retainer bracket
CHECK
When the upper looper point so its is at center of the right needle the upper looper height
should be 10 mm over the needle plate (A).
ADJUSTMENT
1. Set the upper looper point so its is at center of the right needle.
2. Loosen two upper looper retainer guide bracket screw's (B) and move upper looper retai-
ner, as required, so that the upper looper height is 10 mm over the needle plate.
3. Firmly tighten the two upper looper retainer guide bracket screws taking every care not to
move the upper looper retainer guide bracket out of position.
10 mm
2 mm
(B)
(A)

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8. Setting of upper looper in relation to the needle
CHECK
When upper looper is set at its highest position the clearance between the thread hole of the
upper looper (B) and the left side face of the A-needle (right needle) should be according to
4.2~4.5 mm.
ADJUSTMENT
1. Move upper looper to its highest position by turning the handwheel towards you.
2. Loosen screw (C) of the link arm of the upper looper and adjust the looper so that the
clearance between the thread hole of the looper (B) and the left side face of the A-needle
(right needle) is 4.2 - 4.5 mm.
3. Tighten screws (a).
4,2~4,5 mm
A-needle
B
C

16 S0100 / S0105 104 73 97-26
9. Timing of upper looper and lower looper
CHECK
When point of upper looper is aligned with the of lower side of lower looper, the clearance
between the point of the upper looper and the thread hole of the lower looper should be 0.05
- 0.1 mm.
ADJUSTMENT
1. Align the point of the upper looper with the lower side of lower looper by turning the hand-
wheel towards you.
2. Loosen cam screw (A) of the upper looper and adjust the position of the upper looper so
that the clearance between the point of the upper looper and the thread hole of the lower
looper is 0.05 - 0.1 mm.
3. Tighten screw (A).
0.05-0.1 mm
A

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10. Clearance between upper looper and lower looper
CHECK
The clearance between upper looper and lower looper should be 0 - 0.1 mm.
ADJUSTMENT
1. Align point of upper looper with back of upper end of lower looper by turning
the handwheel towards you.
2. Loosen fixing screw (A) of the upper looper and adjust the clearance between upper
looper and lower looper. (0 - 0.1 mm).
3. Tighten screw (A).
A
0~0.1 mm

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11. Feed dog height
CHECK
Turn the hand wheel in sewing direction so the top of rear feed dog teeth is level with the
needle plates top surface, then should also the front feed dog teeth be level with the needle
plates top surface.
ADJUSTMENT
1. Turn the hand wheel in sewing direction so the top of rear feed dog teeth is level with
the needle plates
top surface.
2. Loosen up the screw (A) on the front feed dog.
3. Move the front feed dog so it becomes level with the needle plates top surface.
4. Tighten screw (A).
A

104 73 97-26 S0100 / S0105 19
Right hand needle
Needle plate
Feed Dog
12. Feed timing
CHECK
Turn the hand wheel in the sewing direction and when the needle is going down set the tip
of right needle (A-needle) so its aligned with the surface of the needle plate, then should the
feed dog teeth be aligned with top surface of the needle plate.
ADJUSTMENT
1. Check so the basic feed cam setting is correct.
2. Turn hand wheel in sewing direction you so that the tip of the right needle (A-needle) is
aligned with the surface of the needle plate.
3. Loosen feed lifting cam screw (A) and adjust feed dog so that it is aligned with surface of
the needle plate.
4. Tighten screw (A).
A

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13. Position of the lower knife
CHECK - LOWER KNIFE
1. The lower knife cutting edge (B) should be aligned with the surface of the needle
plate (A).
ADJUSTMENT
1. Loosen the screw (C).
2. Adjust so the lower knife cutting edge (B) is aligned with the surface of the needle
plate (A).
RS
B
A
C