Pfaff 3516-1/25 User manual

Instruction book
Pfaff 3516-1/24;
-1/25;
-1/24-928/01;
-1/25-928/01;
-1/28-928/01
No. 29M2-13 097 engl. HO 97^
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Contents
Page
General Instructions
1. flaking the machine ready for operation 3
2. Inserting the needle 3
3. Winding the bobbin 4
4. Removing the bobbin case 7
5. Inserting the bobbin 7
6. Regulating the bobbin thread tension ^
7. Inserting the bobbin case 8
8. Threading the needle 8
9. Regulating the needle thread tension 11
10. Inserting and removing the dart blade 11
11, Enlarging the dart depth 12
12. Setting and changing the dart length 1
selector
o
13. Adjusting the front position stop of the
dart blade 13
14. Sewing 13
15* Switching off the machine l4
16. Needle and thread breakage 17
17. Machine care 17
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Additional Instructions
^ Page
18, Additional instructions for the
Pfaff 3516-1/2^ and -1/25 21
18.1. Threading the needle (Pfaff 463 sewing head
with new-type thread monitor)
19• Additional instructions for the 23
Pfaff 3516-1/24-928/01 and -1/25-
928/01
19»1* Winding the bobbin (Pfaff 433 sewing head)
2O0 Additional instructions for the Pfaff 3516 24
-1/25 and -1/25-928/01
20.1, Switching on the start and finish bar tacks
21. Additional instructions for the Pfaff
3516-1/28-928/01
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General instructions
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' V
From the library of: Superior Sewing Machine & Supply LLC

1» Making the machine ready for operation (Fiia:s« 1 and 2)
1.1. Compressed air (Fig, l)
It is best to switch the air supply on and off
at the main line rather than at the conditioning
unit •
Open the valve at the main line and check at con
ditioning unit 1 whether presstire gauge 2 indi-
cates a working pressure of 6 kg/cm . If neces
sary, adjust this pressure at pressure regulating
valve 3.
V.^henever you switch on the machine, make sure to
check the oil and water levels in conditioning
unit lo The oil level must not drop below mark
and the water level must not rise above mark
5.
For further details, please refer to Section 17
"Machine care".
1.2. Electric power (Fig. 2)
Tress the black button of master switch 6. The
machine is now ready for operation.
2. Inserting the needle
Switch toggle switch 7 (Fig. 2) to L-i—^ .
As a result, the work holder bar is lowered and
the needle bar raised to its highest point.
If a needle has already been inserted, remove it
as follows: Hold it between thumb and forefinger
and loosen the needle set screw. Tiieii pull the
needle out of the needle holder.
The automatic dart sewer uses only System 13^ kK
needles in sizes 90f 1^0 and 110.
When inserting a new needle, push it up as far
as it will go and tvirn it so that its long groove
faces toward the front. Then tighten the needle
set screw.
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3• Winding the bobbin (Pfaff ^63 sewing head)
In order to avoid unnecessary interruptions of the
sewing operation it is advisable to have a full bobbin
available at all times.
Important note
Pfaff 3516-1/?!^-928/01 and -1/23-928/01 machines
are equipped with a different bobbin winder. Its
operation is described in Section 19.
3.1« Threading the machine for bobbin winding (figs. 3 and
Pass tlie thread from spool (Fig. 3) through a hole
of the upper thread 9, through guide 10 (Fig. ^), through
both holes of thread guide 11 and clockwise around
tension 12. Then wind a few turns of thread clockwise on
bobbin 13.
3o2. Regulating the thread tension (Fig. 4)
The thread tension is regulated by turning knurled
disc l^u Turn this disc cloclcwise to decrease the
tension, or counter-clockwise, to increase it.
For sewing monofil and transparent threads reduce
the tension to a minimum.
30. Adjusting and starting the bobbin winder (Fig, k)
Tension 12 should be so adjusted that the thread
runs onto the middle of the bobbin. This ensures
an even distribution of the thread on the bobbin.
If adjustment is required, this will be carried
out by a mechanic.
To adjust the amount of thread to be wound on the
bobbin, loosen screw 15 and adjust stop dog l6
vertically.
Set the stop dog higher for more thread, or lower
for less thread. After the adjustment, tighten
s cr ew 15.
Push down stop dog l6 to start the bobbin winder.
If resistance is felt, turn the bobbin slightly.
The bobbin winder stops automatically when the
desired amount of thread has been wound on the bobbin.
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I
I
From the library of: Superior Sewing Machine & Supply LLC

From the library of: Superior Sewing Machine & Supply LLC

^• Removing the bobbin case (Fig. 3)
Switch toggle switch 7 (Fig. 10) to I ••• I and
open cover 17 at the front of the machine (Fig. 5).
Open latch l8 (Fig. 5) and pull the bobbin case
out of the sewing hook with thumb and forefinger
of your left hand. As long as you hold the bob
bin case by its open latch, the bobbin cannot
fall out.
5• Inserting the bobbin (Fig. 6)
Insert the full bobbin into the bobbin case so
that the bobbin turns in the direction indicated
by an arrow when you pull the thread.
Hold the bobbin fast and pull the thread into
slot 19 and under the tension spring until it
emerges at its rear end 20.
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