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Part 2: Installation manual Cl. N291
1. General information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2. Assembling the m achine stand . . . . . . . . . . . . . . . . . . . . . . 6
3. Completing and screwing on the table top . . . . . . . . . . . . . . . . 6
4. Connecting the sewing machine motor to the table top . . . . . . . . 6
5. Mounting the machine head, positioning the V-belt and
fastening the pedal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
6. Fastenin g the handwhe el and sy nchronizer . . . . . . . . . . . . . . . 8
7. Connecting the maintenance unit . . . . . . . . . . . . . . . . . . . . . 8
8. Laying and connecting the elec trical cables . . . . . . . . . . . . . . . 8
9. Filling in the oil and readying the machine for service . . . . . . . . . 8
10. Making a sewing test and checking the oil supply of
the mist lubricator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
1. General information
1.1 Safety instructions
For your special attention!
The mains voltage and the
nominal volt age specified o n
the motor name plate must
be identical.
Any work on the electrical equipment
must only be per formed by autho ri zed
personnel and with pulled out m ains plug.
Observe the safety instructions!
1.2 Machine operation without
material
Prior to operating the machine without
material the feet must be locked in their
lifted position. Also the smallest foot
stroke mu st be adjust ed.
1.3 Table tops
The cutouts of self-manufactured table
tops must be dimensioned as specified in
the sketches on page 4 and 5.
The table tops must also have sufficient
carrying strength and rigidity.
1.4 Parts of the sewing unit
The sewing unit incorporates the
following com ponents:
Thread stand 1
Machine head 2
Belt guard 3 an d 7 for the machin e head
and motor
Synchronizer 4
Control panel 5
Main switch 6 with cables
Sewing machine motor 8
Knee switch 9
Maintenance unit 10
Machine stand 11
Rods 12
Pedal 13
Drawer 14
Possibly sewing lamp
V-ripped belt
Miscellaneous small parts in the ac-
cessories
3
4
700 79
1
5
2. Assembling the stand
Assemble the stand parts as shown in the
figure on page 2 and make sure that the
stand rests on all 4 points. To do this, turn
the screw at the machine stand (rightrear) accordingly.
3. Completing and
screwing on the table
top
Screw the reinforcement strut 1 (page 5)
between the cutouts for the machine
head and motor belt.
To relieve the cables of strain, screw the
cable duct and holder to the table top
underside.
Screw on the main switch.
If necessary, attach the sewing lamp
transformer.
Lay the electrical cables as far as possible.
4. Connecting the sewing
machine motor to the
table top
4.1 General
Complete motor packages are available
for the machine, consisting of the sewing
machine m o tor, main switch wi th cables,
V-belt pulleys, V-ripped belt and other
parts.
The motor packages contain a second
smaller motor pulley for V-ripped belt s
that can be used for sewing specifically
thick and closely woven mate rial. With
this pulley up to 3000 spm (otherwise
4000) may be sewn.
The DC motors used on this sewing
machine are operated with a "single phase AC voltage". In the case of several machines the terminals must be therefore distributed evenly among the phases of the
three phase power supply. Otherwise
some phases mi ght be overloade d.
If the electrical equipment is not supp l i ed
by the factory, it must be manufact ured
and checked according to the
EN 60204-3-1 or JEC 204-3-1.
Screw on the drawer with its holder.
Screw on the knee switch to activate the
higher foot stroke.
Screw the table top on the stand using
the wood screws B8 x 35.
The positional relationship o f table top
and stand is determined by the centres at
the table top underside.
Press the rubber pads for the hinges and
the front rubber pads into the recesses of
the table tops.
6
4.2 Fastening the motor
Screw the base of the motor to the table
top. To do this, turn the 3 hexagon head
cap screws M8 x 35 with the washers into
the inserts of the table top.
Fasten the potential sheet 3 such that it
touches both, the motor base 1 and the
hinge 2. The pot ential sheet cond ucts
static charges of the machine head via
the motor to the earth.
Fasten the V-belt pulley to the motor
shaft.
5. Mounting the machine
head, positioning the
V-belt and fastening
the pedal
Mount the ma chine head in the table top.
Position the V-ripped belt.
Adjust the tension of the V-ripped belt.
To do this, change the position of the mo-
tor with respect to the sewing machine
such that t he V-ripped belt can b e
pressed inwards by approx. 10 mm
without great effort.
Check the arr angement of the terminals
in the transformer of the sewing machine
motor, and if necessary, change. The
arrangement must be adapted to the
voltage suppl y.
Screw on the belt guard, and thereby set
its belt retainer cam such that the belt
stays in the V-belt pu l l ey when the
sewing machine is tilted backwards.
Screw the belt guard to the machine
head.
Mount the pedal and rods.
For ergonomic r easons, the peda l i s t o be
aligned later al l y and centred wi t h
respect to the needle.
Adjust the rods such that the released pedal is sloped by approximately 1 0 °.
6
.
2
3
1
7
Fastening the handwheel a. synchronizer
To screw on the handwheel 4 proceed as
follows:
Turn the arm shaft until the timing pin 2
that is slid through the hole 3 in the
housing can be inserted right into the
deepest slot of the disk on the arm shaft.
Screw on the handwheel such that its
mark "A" is level with the timing pin 2.
9. Filling in the oil and
readying the machine
for service
Pour the oil ESSO "SP NK 10" into the
two reservoirs 1 and 7 up to the mark
"MAX".
Pour the oil ESSO "SP NK 10" into the
mist lubricator of the maintenance unit up
to the "groove".
Screw on the synchronizer 5.
When the sync hronizer must b e screwed
on again after a repair, it is necessary to
redetermine its reference position (see
point 9). This is however no longer
necessary, when the following measures
are taken:
Insert the pin of the accessories into the
hole of the handwheel.
Bore an 8-mm-deep hole 6 into t he
synchronizer 5.
Screw on the synchronizer suc h t hat the
pin of the handwheel is in its hole.
Fasten the thread stand.
Screw on the control panel.
7. Connecting the
maintenance unit
Screw the maintenance unit to the stand.
Connect the hose with the maintenance
unit and the machine head.
8. Laying and connecting
the electrical cables
Lay the cables.
Connect the cable plugs that are mostly
marked with symbols with the appropriate
bushings.
Connect the compressed air hose with
the mainte nance unit and the compressed air supply.
Set an operating pressure of 6 bar with
the pressure regulator.
Connect the mains plug with the mains.
Determine the reference pos i tion of the
synchronizer.
Proceed as described in the service
manual and the instruction manual of t he
motor manufacturer, thereby referring the
reference position to the position D of the
handwheel.
After the reference position has been
determined, the signals "1
nd
"2
position" are correctly timed.
st
position" an d
10. Making a sewing test
and checking the
supply of the mist
lubricator
With turned off machine, thread the
needle thread and install the bobbin (see
operation manual).
Make a sewing test with material.
To do this, operate the sewing machine
for some minutes at low speed before
sewing at ma xi m um speed.
Check the supply (approx. 1 drop with 10
work cycles) o f the mist lubri cator and correct, if necessary.
8
9
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