Baby Lock Jewel Service Manual
© Baby Lock, all rights reserved
34
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Pro Frame side arms assembled in the wrong holes.
•
Too much fabric tension on the poles can cause it to trampoline or flag.
•
Improper threading – missed thread guides or thread not pulled up into the top tension
assembly disks.
•
Bobbin case spring dislocated or full of lint.
Four things required for proper machine timing setting:
•
Needle – straight proper size and system.
•
Needle height.
•
Needle
distance.
•
Loop lift.
•
Note: it is critical that there not be excess play in the hook shaft or needle bar in order
to set the above correctly.
Stitch length in Manual & Stitch Regulation Mode
Manual Mode - user selects motor speed
In manual mode you can select the desired motor speed and then the speed of your
movement determines the stitch length. Consequently, consistent movement/speed
is very critical to a consistent stitch length. The faster you move the longer the
stitches will be. The slower you move the shorter the stitches will be.
Stitch Regulation Mode - user selects Stitch Length = # of stitches per
inch
In Stitch Regulation Mode you can select the desired stitch length - but cannot select
the motor speed on the controls. The motor speed is then controlled only by your
movement/speed. The faster you move the faster the machine sews. The slower you
move the slower the machine sews. If you move too slow, the machine will sew in the
same place - causing broken stitches and other problems. If you do not move at all
the machine will stop. If you move too fast you will exceed the Stitch Regulator's
capability to keep up thereby defeating the Stitch Regulation capability and also the
selected stitch length. The machine will go into Overspeed Mode (the operator is
moving across the quilt faster than the machine can keep up – even at 100% speed).
In Overspeed Mode the machine sews 100% speed in an attempt to keep up - it can
not sew any faster than 100%. When the operator moves a little faster in Overspeed
Mode the stitches will be longer and if the Operator moves a little slower in
Overspeed Mode the stitches will be shorter. In either case in Overspeed Mode the
stitches will not be the length the operator selected
“Because the operator was
moving faster than the machine could physically keep up
”. When the operator
slows down to where the machine can keep up and regulate, it will automatically start
regulating again, and produce the selected number of stitches per inch.
In both modes an even speed brings the best and most consistent stitch length
results.
Summary: