JEWEL Baby Lock User manual
BabyLock
ServiceManual
Provisional
Baby Lock Jewel Service Manual
© Baby Lock, all rights reserved
2
Table of Contents
About the Baby Lock Jewel Quilting Machine...................................................................... 4
About the Manual ................................................................................................................... 4
Service Manual General Rule................................................................................................. 4
General Specifications.............................................................................................................. 5
Assembly Torque Specification ............................................................................................... 5
Lubrication of the Hook........................................................................................................... 6
General Observation of the Front Frame Cover, Mast and Hand Wheel........................... 6
Replacement of cover ............................................................................................................. 8
Removal of the Front Cover ................................................................................................... 9
Machine Cross Section ........................................................................................................... 11
Axial Play Check and Adjustment ........................................................................................ 14
Adjusting the Base Plate Feet and Rollers............................................................................ 15
Adjustment of Base Plate Rollers:........................................................................................ 15
Adjusting the motor belt Tension.......................................................................................... 16
Adjusting Transmission Gear Lash (play) ........................................................................... 17
Adjusting the Timing Belt Tension ....................................................................................... 18
Adjusting the Presser Foot (Sewing Foot)............................................................................ 19
Needle Position, Check, & Adjustment................................................................................. 20
Adjustment for Y axis:.......................................................................................................... 20
Adjustment for X axis:.......................................................................................................... 20
Adjustment of the Loop Lift and Needle Distance............................................................... 21
Adjusting the Needle Bar Height........................................................................................... 23
Adjustment of the Stop Finger............................................................................................... 24
Adjusting the Needle Height with Cylinder Tool................................................................. 25
Needle Height with Cylinder Tool........................................................................................ 25
Baby Lock Jewel Trouble Shooting Guide........................................................................... 27
Loop Lift............................................................................................................................... 27
Needle Hook Reference........................................................................................................ 28
Loop Lift, Hook, Tension Illustration................................................................................... 29
Bobbin Case Tension Adjustment ........................................................................................ 30
Understanding Top Tension.................................................................................................. 31
Some things to check - Visual checks of the top tension assembly:................................. 31
Thread Shredding & Breaking Issues................................................................................... 32
Skipped Stitches.................................................................................................................... 33
Proper Stitch formation:.................................................................................................... 33
Four major causes of skipped stitches: ............................................................................. 33
More Causes of Skipped Stitches: .................................................................................... 33
Four things required for proper machine timing setting:.................................................. 34
Stitch length in Manual & Stitch Regulation Mode.............................................................. 34
Manual Mode - user selects motor speed.......................................................................... 34
Stitch Regulation Mode - user selects Stitch Length = # of stitches per inch .................. 34
Stitch Regulator ...................................................................................................................... 36
Stitch Regulator Basic Theory:............................................................................................. 36
The Regulator will do the desired stitches per inch if: ..................................................... 36
Baby Lock Jewel Service Manual
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Possible Misunderstandings:............................................................................................. 36
Setup and Mechanical Problems:...................................................................................... 36
Operation Problems: ......................................................................................................... 37
Stitch Regulator – Methodical Check................................................................................... 38
Stitch Regulator Trouble shooting:....................................................................................... 39
Setup Errors: ..................................................................................................................... 39
Operation Errors: .............................................................................................................. 39
Mechanical Problems:....................................................................................................... 39
Electronic Problems: .............................................................................................................. 39
LCD Screen Operation........................................................................................................... 40
Baby Lock Jewel Service Manual
© Baby Lock, all rights reserved
4
About the Baby Lock Jewel Quilting Machine
The Baby Lock Jewel Quilting Machine utilizes high-tech electronics and an
innovative touch-pad user interface to offer greater functionality and ease of operation
to home quilters than ever before conceived in the quilting industry. The Baby Lock
Jewel Quilting Machine is a high quality machine that incorporates very robust design
features and is very easy to service.
The Baby Lock Jewel Quilting Machine is constructed following a specific sequence
of operations - similar to the construction of a house. Walls cannot be erected until
the foundation is in place. Similarly, this service manual has been written with an
adjustment logic that is driven by the construction processes used to create the
machine. If the service technician carefully follows the adjustment steps in the order
presented, a fine running sewing machine is possible each and every time.
About the Manual
The purpose of this service manual is to help the technician complete a repair on a
machine accurately and quickly. The manual is complete with photographs and
explanations that we hope will aid you in your repair efforts. In addition to the
teaching aids found herein, you will also find all of the tools listed that are necessary
for adjustments. If you need help in locating these tools for purchase, please contact
the company.
Service Manual General Rule
•Adjustments shown in the manual should only be made if a setting deviates from the
tolerance specified in the manual.
•Adjustments should be made only in the logical sequence shown and described in the
manual.
•Safety must be considered when working on any machine. Safety warnings are
included throughout this manual where appropriate, but these warnings do not
address all possible safety concerns that might confront the service technician.
•When working on or near any live electrical assemblies, the power cable must be
removed from the machine.
•We urge you to observe the cautions in the manual.
•Please note that the hand wheel must always be turned in the direction of normal
rotation unless otherwise instructed. This is especially true when making the loop lift
timing and needle height adjustment.
Baby Lock Jewel Service Manual
© Baby Lock, all rights reserved
5
General Specifications
Dimensions: (210 X 410 mm)
8.25” X 16.00”)
Sewing Speed: (Min 150spm,
Max, 1500 spm)
Needle System: 134R (135 X 7)
Needle Sizes, (recommended): 14/90 - 19/120
Hook System: (Rotary, custom made, Cerliani,
Type FA, Vertical, M Bobbin)
Bobbin Type: Aluminum, Class M
Bobbin Case: Cerliani, Type MF
Motor Type: Brushless DC, internal encoding
Needle Positioning: Up and down, full and half stitch
Electrical Power: 120 V, 60Hz, 150 W
LED Power Consumption: 20 W
Sew Foot Stroke/Lift: 5 mm
Needle Bar Stroke: 35.3 mm
Take-Up Stroke: 73 mm
Assembly Torque Specification
The Torque Specifications apply to all internal fasteners in sizes 4.0, 5.0, and 6.0mm
in general at ISO 4762 Screw class 8.8. The torque specifications are also generally
classified as soft jointed and are listed according to size and placement in the
machine.
1. 4 mm Allen Socket Head Cap Screws, Class 8.8 @2.5Nm
•Head-frame, and main bearing retainers
2. 5mm Allen Socket Head Cap Screw Class 8.8@ 5.6Nm
•Motor Frame Mounting
•Pulleys
•Collars
3. 6mm Allen Socket Head Cap Screws Class. 8.8 @ 9.9Nm.
•An exception must be observed here since the screws are considered soft
jointed and shallow threaded and are used externally. It is therefore advised
that this torque specification not exceed 6Nm.
Baby Lock Jewel Service Manual
© Baby Lock, all rights reserved
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ure 2
Lubrication of the Hook
Apply one drop of oil to the raceway of the bobbin case support two to three times per day. This
application is based upon sewing for 8 hours of machine time. If the machine is used less, lubricate
the hook less frequently. After the lubrication of the hook, it is recommended that one momentarily
sew on scrap material before resuming the sewing of the quilt. Failure to do so may result in oil stains
on the quilt piece.
General Observation of the Front Frame Cover, Mast
and Hand Wheel
The following observations, accompanied by necessary adjustments, will ensure trouble-free thread
passage. Failure at any of these points will significantly affect thread tension.
Tools required: (2mm, 2.5mm handle Allen, 8mm open end
wrench)
Check:
1. The Spool Stand (mast) should be adjusted so that the eyelet
loops are centered directly over the spool pins.
•If a correction is necessary, loosen the jam nut, reposition
and tighten the jam nut.
Figure 1
Oiling location
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ure 3
4
5
1
2
3
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ure 4
Figure 5
Split Shaft
2. Make sure that a gap of 1.0mm to 1.5mm exists
between the frame and the hand wheel. (Note: This
can only be adjusted when the front frame cover
has been removed.) See Figure 3.
•If a correction is necessary, loosen the hand
wheel set screw, (Note: this can only be done
after removing the front cover) position the
hand wheel and retighten the screw. (3mm
handle Allen
3. Inspect the condition of the thread guides
1, 2, and 3, and thread stirrup 4, and
thread guide 5 for any abrasions, cuts, or
electroplating blistering. Replace any
damaged parts as shown in Figure 4.
4. Check the top tension assembly for the following:
•A gap of 1.0mm to 1.5mm exists
between the frame boss and the
back disk of the tension assembly,
see figure 1.4. If a correction is
necessary: loosen screw. (2mm
handle Allen), adjust the gap
between the front cover and the
rear tension disk, and retighten
screw.
•Check between the tension disks
for any foreign material that could
prevent the disks from functioning
properly. If a correction is
necessary, remove the knob, tick
washer, tension disks, and core
spring. Clear and reassemble.
•Check that the take up spring has a normal torsion tension and inspect the spring for any
cut or abrasions. Adjust or replace if necessary.
•Check that the top tension knob has resistance and can not vibrate loose while sewing. To
correct: remove the knob, tick washer and core spring, adjust the split bolt by spreading
with a #3 flat-slot screw driver until the knob has adequate resistance to keep its setting.
•Check that the take-up spring is positioned to 11:00. if not loosen (2mm handle Allen) and
rotate split shaft.
Baby Lock Jewel Service Manual
© Baby Lock, all rights reserved
8
Replacement of cover
Replace the front cover in the reverse order that it was disassembled.
Note: See torque specifications chart in the specification section for torque values.
CAUTION: DANGER OF ELECTRICAL SHOCK – DANGEROUS VOLTAGES
Do not plug main power or run the sewing machine with the p-pod off of the machine
and or open so that human body part comes in contact with electrical energy.
Note 1: The C-Pod and the P-Pod are STATIC SENSITIVE parts and should not be handled without
special discharge tools. For this reason, all C and P Prints will be exchanged in the pod covers. Do
not remove the Printed Circuit Boards (PCBs) from the pods.
Note 2: The colored edge of the ribbon cable is always located on pin 1 of a plug socket. The motor,
opto-interrupter, and handle bar cable plugs are keyed.
Note 3: After installing the cables through the service hole on the front cover, carefully take out any
excess cable through the hole and fold inside of the pod covers. This will prevent any pinching or
subse
q
uent dama
g
e to the cables b
y
movin
g
p
arts.
C Print/Pod Cables D Print/Pod Cables
Baby Lock Jewel Service Manual
© Baby Lock, all rights reserved
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ure 8
C
C
Removal of the Front Cover
Tools required: 2mm, 3mm, 4mm handle Allen, 4mm L Allen, #3 flat-slot screwdriver,
and #2 Phillips screw driver.
1. Loosen the set screw A in Figure 6, rotate the thread guide
to allow access to the frame screw, then re-snug. (2mm
handle Allen tool)
2. Remove the three frame screws as shown in Figure 7.
(3mm handle Allen tool)
3. Remove the “C-pod” by unscrewing the 4 screws “C” in Figure
8. (#2 Phillips screwdriver)
4. Carefully unplug the cables from the C-print and pod. Be careful
not to touch the C-print. Figure 9. See plug configuration on
page 8.
A
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ure 6
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ure 9
Fi
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ure 7
Baby Lock Jewel Service Manual
© Baby Lock, all rights reserved
10
Figure 10
D
Fi
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ure 11
5. Remove the needle plate. Figure 10. (#3 flat-slotted
screwdriver)
6. Remove the 5 frame screws “D”
in Figure 11. Note: The fifth
screw is behind the C-print
removed in step 4. (4mm
handle Allen – may need 4mm
L Allen tool to break loose
screws)
7. Separate the Front Frame Cover. Make sure the take up lever does not get caught in the
frame slot.
Note: If the frame cover is not easily removed, loosen the front base plate screws. (5mm
handle Allen)
Baby Lock Jewel Service Manual
© Baby Lock, all rights reserved
11
Machine Cross Section
Baby Lock Jewel Service Manual
© Baby Lock, all rights reserved
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Figure 12
Pitman Crank
Pitman
Checking and Securing Flats & Screws
This machine has been designed using flats and special screws so that loop lift timing cannot
slip. Tools required: (2.0 and 2.5mm handle Allen)
Check the following locations, making sure that the first screw
of a timed component has been fixed firmly on the respective
flats on shafts.
Note: The screws are generally positioned 120 degrees
apart. When the first screw (Position 1) has been located
and tightened on a flat, the second screw is then
tightened, compounding the tightness of the first screw,
thus securing and assuring that timing will not change.
(See Figure 12)
Note: See torque specifications chart in the
specification section for torque values.
NOTE: The thrust collar flat is inclined. The first screw
(shown in Figure 13) must be provisionally tightened.
The second screw is then fully tightened. The first
screw is then fully tightened. It is important to check
that this collar tightening procedure did not create a
tight arm shaft condition. If so, readjust the collar
again.
Figure 13
Thrust Collar
Figure 14
Main Timing
Pulley
FIRST SCREW, FIRST POSITION RULE:
The first screw or first position is ALWAYS
located 120° apart in the direction of rotation
from the second screw or second position.
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ure 16
Hand wheel screw – inside frame (3mm handle Allen)
Drive pulley screws (2.5mm handle Allen)
Transmission gear & pulley screws – (2.5mm handle
Allen)
Hookshaft gear screws (2.5 handle Allen)
Fi
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ure 15
Fi
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ure 17
Baby Lock Jewel Service Manual
© Baby Lock, all rights reserved
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Figure 18
Axial Play Check and Adjustment
Axial or end play on shafting can result in noise, wear, and
faulty sewing.
Tools required: (2, and 2.5mm handle Allen)
Check:
1. Check the arm-shaft by pushing and pulling on the
hand wheel. See Figure 18. If a correction is
necessary:
•Loosen the thrust collar (See Figure 19)
•Adjust so that no play is detected. Care must be
taken on the first screw that is fixed on an
inclined flat so as not to tighten too tight at
first.
•Provisionally set the first screw, tighten the
second screw fully tight.
•Tighten the first screw.
2. Check the transmission shaft by pushing and pulling
axially on the gear as shown in Figure 20. If a correct
is necessary:
•Loosen the 2nd screw on the gear first and use
the first screw (on the flat) to adjust any play by
moving the gear outwards towards the bushing.
•Tighten the first screw on the flat and then
tighten the second screw.
3. Check the hook shaft by pushing and pulling the
hook as shown in Figure 20. If a correction is
necessary:
•Remove the play by loosening the hook shaft
thrust collar and adjusting out any axial play as
shown in Figure 22. (Note: No shaft flat is located
here.)
Figure 19
Figure 21
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ure 20
Fi
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ure 22
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Figure 23
Figure 24
Figure 25
Adjusting the Base Plate Feet and Rollers
Tools required: (5mm handle Allen)
Check:
1. The Base Plate must be adjusted so that the rubber
feet will sit flat on a planed surface.
If a correction is necessary: 0.012” shim washers may be used
as shown in Figures 23 and 24.
Adjustment of Base Plate Rollers:
The base plate rollers must be equally spaced in their respective
positions.
If a correction is necessary:
•Slightly loosen the front base plate screws.
•Shift the front base plate until the front and rear wheels
are equidistant as shown in Figure 25.
Baby Lock Jewel Service Manual
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Adjusting the motor belt Tension
NOTE: The motor belt tension need not be tightened as tightly as
the main timing belt. See Figure 26.
Check the belt tension for tautness by pressing it with the index
finger (see Figure 26). Proper belt tension provides for some belt
flexibility under light finger pressure, but should not be so tight as
to bind the machine. If correction is necessary:
•Loosen the motor frame screws 1,2,3 and 4 shown in
figure 27
Fi
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ure 26
Figure 27
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Adjusting Transmission Gear Lash (play)
Check the transmission gear lash, between the metal transmission gear and the delrin hook shaft gear.
Note: Do not adjust this unless you are sure it needs adjusting. This will affect the timing of the
machine. There should be little or no lash between the two gears. If correction is necessary:
•Loosen the two screws in the elongated slots on the transmission housing above the gear.
(4mm Allen tool)
•Adjust the transmission mount with elongated slots up (for more lash) and down (for less lash)
until has the least amount of gear lash and noise.
NOTE: The transmission housing is pushed to the right towards the hand wheel end of the machine,
until flush with the machined edge while being adjusted.
•Tighten the two transmission housing screws.
•NOTE: Improper adjustments of this setting will cause timing and noise problems.
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Adjusting the Timing Belt Tension
Check the timing belt for tautness by holding the transmission pulley and rocking the hand wheel. You
should not be able to feel play between the belt teeth and the transmission timing pulley teeth. NOTE:
if you tighten the belt too much you will create a bind or extra noise in the machine. If a correction is
necessary:
•Loosen the idler pulley screw and locknut – the bracket has an elongated hole in the motor
hosing for idler adjustment. (5mm Allen tool and 10mm wrench)
•Adjust the idler pulley in or out until the timing belt has the proper tautness.
Baby Lock Jewel Service Manual
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ure 29
Figure 30
Adjusting the Presser Bar Height
Tools required: (3 mm handle Allen, 0. 5mm feeler gauge)
Check:
When the needle bar is in its lowest position, the sewing
foot should be no higher than 0.5mm above the needle plate
as shown in Figure 28. Note: the factory default on the
sewing foot is with it screwed into the presser bar 7
revolutions. Check the foot without removing it by
looking to see that there are about 13-15 threads of the
foot exposed below the hopping foot jam nut. It is
important to check this before resetting the presser bar
height in case the end user has changed the foot height.
Improper setting of the presser bar height and foot height
can cause stitch problems, including skipped stitches.
If a correction is necessary:
•Turn the hand wheel until the needle bar is at
its lowest position.
•Place the (0.5mm feeler gauge) under the
hopping foot. Figure 28
•Loosen screw C through the machine front
cover (3mm Allen driver) Figure 29
•Rotate the presser bar while raising the presser
bar up or down to the desired position.
•Tighten screws C. Figure 29– push down lightly
on the tool blade towards table while tightening.
Adjusting the Presser Foot (Sewing Foot)
This machine features a hopping mechanism, allowing the sewing foot to move (hop) up,
down, and dwell on the fabric when the needle is in the fabric. This allows fabric to move
through the machine similar to a normal sewing machine with a feed dog. The dwell time
allows for a longer hesitation of the foot on the fabric and
completion of the stitch cycle. The results are better tension,
less needle breakage, and increased hook life.
If a correction is necessary:
•Install the loop lift clamp onto the right angle bend of
the sewing foot as shown in Figure 30. While holding
the clamp and foot, loosen the jam nut. Screw the
foot shaft to the desired height. Tighten the jam nut.
(clamp, 8mm open end wrench
Note: Under NO circumstance loosen or tighten the jam
nut without HOLDING the sewing foot as indicated
Figure 28
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ure 33
C
D
E
F
G
H
Needle Position, Check, & Adjustment
The needle position adjustment is the most important of
all adjustments in the machine. Needle Position provides
the foundation for which all other settings are made.
Once the needle position has been completed, great
care must be maintained to keep this setting. It is
important that the sewing instrument is transported in a
most careful manner so as not to allow bumping or
dropping.
Tools required: 2mm, 3mm handle Allen
Check:
•Use a new 134R (135 x 7) needle. The
needle must be centered in the stitch hole of
the needle plate as shown in figure 31.
(2mm and 3mm handle Allen)
Adjustment for Y axis: Note that adjustment is done with the front frame
cover off.
•Loosen first the screws G and D in figure
33 (3mm handle Allen)
•Loosen screws A and B in figure 32.
(3mm handle Allen)
•While pushing the head frame back into
the main casting, gently slide the head
frame left or right to correct as necessary.
•Tighten screws A and B in figure 32.
(Note: If needle position changes, repeat the
process.)
Adjustment for X axis: Note that adjustment is done with the front frame
cover on. Important Note: The picture shows the
cover off for illustration purposes only!
The primary adjustment is accomplished using the
right side of the head frame shown in Figure 26. The
screws on the left side are loosened to allow
movement of the head frame.
•If a correction is necessary, loosen screws
F, H, (2mm handle Allen) and G (3mm
handle Allen).
•Loosen screw D (3mm handle Allen) and
back off screw E (2mm handle Allen).
Figure 31
Bobbin case end
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ure 32
Screw A
Screw B
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