22
5
.
Lifting the presser foot by electromagnet
5.1 Description
The core of the electromagnet, respectively its pin must be set in such
a way that the presser foot lifting is enabled.
5.2 Setting the electromagnet pin
Caution! Danger of injury!
Switch off the main switch! Before starting the setting
operation, wait until the motor stops!
- Unscrew the cap of the core (1) of the electromagnet.
- Shift the core (2) with the pin (3) and unscrew the locking screw (4).
-
Unscrew the pin (3) in the core (2) in the A direction up to the stop.
- Push the core (2) into the magnet (5) in the B direction up to the
stop.
- In this position, set the maximum top roller lifting in the B direction.
- Screw on and tighten the arresting screw (4).
- Screw on the cap (1).
5.3 Setting the electromagnet current
The time response of the current of electromag. has 2 phases:
- initial switching on (0,2 ÷ 0,5 s) - the maximum force
- maintaining (when keying)
It is necessary to set max. 40 % of keying (see instructions
for use of the stopmotor). With a higher value thereof
and with a long period of the presser foot in its lifted
position there is a danger of electromagnet overheating.
5.4 Aseembly of the presser foot lifting el. magnet
Caution! Danger of injury!
Switch off the main switch! Before starting the setting
operation, wait until the motor stops!
- Remove the rear guard (3).
- Using the screws (1),fasten the electromagnet(2) on the rear guard(3)
with the given orientation of the outlet cable(4).
- Mount the rear guard (3).
- Connect the outlet cable (see par. 7).
- Set the pin of the electromaghet (see par. 5.2).
- Set the current of the electromagnet (see par.5.3).
6. Backtacking using electromagnet
6.1 Description
The position of the electromagnet with regard to the backtacking lever
must be set in such a way that it enables the maximum stitch length
when sewing in forward and in rearward sense. If this position is not
correct, the length of the stitch will be shortened in one or the other feed
direction.
6.2 Electromagnet height setting
Caution! Danger of injury!
Switch off the main switch! Before starting the setting
operation, wait until the motor stops!
-
Set the position of the electromagnet (2) in the upper position of the
grooves of the guard (3).
- Proceed to the mounting of the guard (3) with the magnet on the
machine head.
- Set the maximum stitch length and push the reverse stitching lever
into its bottom position (as with the reverse stitching operation).
- In this position, the bar (5) must be in contact with the roller (4) of
the lever (6). Otherwise shift the electric magnet (2) in the grooves of
the guard (3).
1
3
4
2
1
2
3
4
5
2
4
1
3
5
A
B
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