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average person could never figure out the names of some
6-12
of the parts, which makes it necessary to refer to the part
number. Without the parts manual, this is impossible. In
fact, some companies and individuals refuse to take delivery
of new machines if the manuals are not with them.
Experience has shown that the average rigger who wishes
to set up a loft needs three initial machines: a lightweight
single needle such as a Singer 31-15 or Mitsubishi DB-
130 [Figure 6-57] for canopy repair and lightweight
maintenance; a double needle such as a Singer 212W140
or Mitsubishi LT2-220 [Figure 6-58] with a binder or taping
attachment for binding material and light manufacture;
and a medium-duty double throw (308) zigzag
machine such as a Bernina Model 217 [Figure 6-59] for
suspension line repair and replacement.
For those individuals on a tight budget or with space constraints,
a good idea is to buy a double needle machine
first. By removing one needle and bobbin, the machine
will perform excellently as a single needle machine.
Replace the needle and bobbin, and the machine again is
a double needle. This gives the rigger two machines for
the price and space of one. A good zigzag machine will
also do multiple duty. Its primary purpose is for zigzag
sewing. However, adjusting the stitch regulator allows the
rigger to do an acceptable job sewing bar tacks. By changing
the stitch length and adjusting the width to the narrowest
setting, some machines will do good straight
stitching such as the Pfaff model 138.
Figure 6-59. Bernina Model 217.
For those riggers who advance to master rigger and
wish to really get into the profession, they will need
additional specialized machines such as a mediumduty,
single needle, compound feed machine like a
Consew 226R or a Juki LU-563. [Figure 6-60] This
type of machine is used for doing container repairs
and light harness work. The next machine should be
a heavy-duty harness machine such as a Singer 7-33
or Consew 733R. [Figure 6-61] These machines specialize
in sewing 5-cord nylon or heavier thread used
in the manufacture and repair of parachute harnesses.
Figure 6-57. Mitsubishi DB-130.
Figure 6-58. Mitsubishi LT2-220.
Figure 6-60. Juki LU-563.
Figure 6-61. Consew 733R.
6-13
Lastly, a bar tack machine such as a Pfaff 3334
[Figure 6-62] or Singer 69 class allows fast, strong,
professional repairs and is invaluable in line replacement
and manufacturing. This selection of machines
provides the rigger with the ability to undertake virtually
any repair or modification needed on today’s
parachutes. Remember, all sewing machine manufacturers
build models that fit within the various duty
types. Those models mentioned are only representative
for that category.
Figure 6-63 shows the comparative models of various
types of machines currently available.
IDENTIFICATION AND NOMENCLATURE
The purpose of the following information is NOT to
make you an accomplished sewing machine expert and
repairman. You should learn the basics about what makes
your sewing machines work and how to perform routine
maintenance and service. If you don’t, you will suffer
needless frustration for simple problems, and it will cost
you excessively in down time and service repair bills. The
information on troubleshooting provides you with the
basic knowledge needed to keep your machines running.
Some individuals find that they have an affinity for
repairing and maintaining sewing machines. For those of
you who do not, cultivate relationships with these people
carefully. They will be most valuable to you.
Figure 6-64 shows the front view of a modern lightduty
single needle machine. The numbers correspond
with the description.
SEWING MACHINE MODEL COMPARISON
Make
Singer
Consew
Juki
Brother
Mitsubishi
Pfaff
Bernina
31-15
292R
DLN-415
DB-130
—
111W151
N/A
B-791
DY-340-
12
—
111W155
206RB-4
LU-563
LU2-400
—
112W116
333RB-1
LH-515
LT2-220
—
17W15
199R-2A
LZ-780-
11
138
217
68 or 69
class
N/A
3334
—
7-33
733-R2
—
97-10
N/A
—
Single
needle light
duty drop
feed
Single
needle
medium
duty
needle
feed
Single
needle
compound
feed
Two
needle
feed
　
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