Bernina 121 Instruction Manual
Whenever Something does not 8eem to be quite
ckeor, please ask 8wpgivier8 of uour `maehinie for
ettplcunahi,on.
In pourtieulour cases, we our8eive8 win give Uove
cmtl further informartion uove may need.
When writing io ue, plea8e always State the narme
of uour 8`urpplher cmd give us the 8erial rvumber of
the machine. You wth find th48 rvumber at the
ba,ck of the frcune, above the motor casing.
•=`-:.=i-ap_
1*,,`'--,/
Instructions
4&p operating the
BERIV]rvA PORTABI.I
Model 121
FR. GEGAUF LIMITED
Bernina Sewing Machine Factory
STECKBORN
Switzerland
INDEX OF CONTENTS
Removing and replacing the machine in the carrying
Case................
Denomination of parts ..........
Cleaning and oiling the machine .......
Electric drive ..............
Oiling the motor .............
Illumination..............
Suitable needle and thread .........
Comparative table of needles and threads ....
Left-hand and right-hand twisted cotton ....
Removal of bobbin case ..........
Bobbin winding .............
Inserting bobbin in case, and threading .....
Inserting bobbin case in rotary hook ......
Setting the needle ............
Threading the spool thread .........
Bringing up the bobbin thread ........
Thread tension scale ............
Tension of top and bottom threads .......
Fitting the sewing table ..........
Sewing....-...........
Sewing forwards and backwards and setting length
of stitch ...............
Removing work from machine ........
Darning................
Darning stockings ...........
Darning with wool ............
Hemmer...............
Lap hemmer (feller) ...........
Edger with quilter guide ..........
Useful hints for remedying troubles ......
List of accessories
Inside back cover
Page
Direl;tions
fop use of the
BERrv[IVA PORTABI.I:
for plain sewing
Model 121
FR. GEGAUF LTD.
Bernina Sewing Machine Factory
STECKBORN
Switzerland
Fig. 1
Removing and replacing lhe maclline in lhe
cai.ying case
To take the machine out Of its case, place the case up-
right and open it as shown in the illustration above.
Hold the machine under the upper arm and lift it out
of the case. Hold it the same way when replacing it into
the case. When packing up the machine after use, make
sure that the handwheel is on your right.
2
3
Cleaning the machine
During sewing, remnants of thread will collect, especially
arou.nd the rotary hook, and may hinder the smooth
running of the machine. The frequent removal of such
remnants is therefore essential. Take off the throat plate
from time to time and remove the fluff that has gathered
below it.
The removal of the throat plate is very simple, for there
are no screws to slacken. Just open the hinged cover
in front of the open arm and push the throat plate up
with a finger of the left hand.
Oiling lhe machine
The points that need oiling are shown in the picture on
the opposite page. Oil the machine frequently, but not
too heavily. A few drops of oil are sufficient to keep
the machine running smoothly. If too much oil is applied,
the excess will drain off unused and may stain the
fatoric. AlwGbus oil the rna;chile I)efoi.e use z\nd not
after it.
Use clear sewing machine oil only, free of resin and
acid. If oil of inferioi. quality is employed, it may get
sticky when it dries and the machine will run hard.
Careful cund correct oiling wi,ll insure ecbsu rurming cund
prevent unnece88ary wean. of the pan.ts.
It should particularly be noted that the machine only
should regularly be oiled, bwt 7z,ot tfae 77®oto7.. Special
instructions for oiling the motor will be found in a
next chapter.
4
The most vital and delicate
part of the sewing machine is
the rotary hook. Special atten-
tion should be given it. Take
care to frequently lubricate its
L`ace with a few drops of oil at
the point indicated in Fig. 3a.
If the sewing machine has
been standing in a cold i`oom,
it should be opened and
brought in a warm room about
an hour before use so that it
can warm up to room tempei`ature and the oil in the
bearings will again become fluid.
5
Fig. 4
The elec.ric drive
The motor is protected by a casing at the back of the
frame. A small plate 1 is fixed on the casing, specifying
the,voltage and the power in watts. The voltage of the
motor must correspond with that of the lighting mains,
which can be ascertained by inspecting the particulars
quoted on the electricity meter or a lamp (but not on
plugs and wall-sockets). If the machine is used away
from home, always check the mains voltage with that
of the motor be/o?.e starting to work. If they do not`
correspond, a transformer is necessary.
When the motor is connected with the mains by flex 2,
slight pressure on the knee control will start the rna- .J
chime. The more the knee control is pressed to the right,
the faster the machine will run. Should the machine
fail to start on account of heavy material or thick seams,
give the handwheel a slight turn towards you.
Special lnslruclion loi Oiling the Moloi
1. Oiling the motor too faeowc7" will lead to trouble.
2. When the speed of the machine has diminished con-
siderably, it is generally due to excessive oiling of
the motor.
3. In every new machine the motor is ready-oiled and
should 7t.ot be lubricated again during the first year.
4. After the first year, the motor should be oiled o72ce
onlu everu sbu mouths 4f used dally. Do nch introchce
more than 4-5 drops of oil at the two lubrication
points marked in red, inside the motor casing. If the
machine is used o7ize/ o7tce c® oueefo, tfoe 77toto?. does 7tot
need oiling more t,ham `onee a Weal..
5. If the motor is insufficiently lubricated, an excessive
noise will be noticed.
6. To oil the motor, take off the casing in which same
is protected. For this purpose remove the three
screws A (Fig. 4) and introduce 4 or 5 drops of clear
sewing machine oil into the two bearings at the points
marked in 7`ed.
7. Make cobso!"tezey 8tt7.e that 7t,o oil is applied to any
other part of the motor.
8. These instructions for oiling apply to the motor only.
IIIuminalion
The sew-light is built into the special face plate. The
light is switched on and off by pressing on button 3.
The change of the bulb is made as usual. To take off
the bulb, screw it anticlockwise; to insert it, screw it
clockwise.
6
7
Loading...