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3.9 Bobbin winder
3.9.1 Description
The winder (bobbin winder) winds a reserve of the hook thread.
It is driven by a spring-mounted friction gear, which stops after
having filled the bobbin.
An ideal winding is attained with a sufficient pretension of the
thread obtained on the thread guide (4) and with 1 mm under the
diameter of the bobbin. The shaft is mounted in a swinging way
and the friction gear is put into engagement by means of a pickup
lever (1) and a cam. The winder is fixed on the machine arm by
two screws (3). The thread is passed through according to the
illustration, the thread is cut off after having stopped the winding
operation using the cutting device (5).
3.9.2
Setting the bobbin winder stop
The moment of interrupting the winding is determined by the
mutual position of the pickup lever (1) and the cam (5) on a
common shaft.
The cam is locked in its functional position by the screw (6). The
mutual position is to be set on a not incorporated winder in such
a way that in the moment, when the pickup lever leaves the space
of the bobbin, the pressing function of the cam on the winders
shaft is interrupted and it moves in the sense of the arrow. A fine
setting is to be done on an incorporated condition in the machine.
Using the screw (2), the position of the friction part of the pickup
lever (1) is adapted. In opening the lever, the stopping function is
accelerated. Its inverse function delays it. A test is to be done after
having inserted the bobbin, when passing the thread through the
device and when winding at the running of the machine.
3.9.3 Setting the friction gear
The friction gear is formed frontally by the disk (8) on the
main top shaft of the machine and by the disk (7) with a rubber
ring on the shaft of the winder.
Caution! Danger of injury!
Switch off the main switch! Before starting the setting
operation, wait until the motor stops!
- Proceed to the setting operation with a removed rear guard.
- The winder is in its stopped position.
- Loosen two screws (9) in the disk (8) through the hole in the
arm.
- By shifting axially the disk in the sense A, B, set the disks of the
winder (7) at the distance of 0.5 mm from the rubber ring.
- Tighten the screws (9) in the disk (8).
- Put the winder in its working position and proceed to a winding
test.
- Mount the rear guard.
5
1
4
3
2
7
8
9
A
B
1
6
5
2
