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6.3 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.
6.4 Aseembly of the top roller lifting
electromagnet
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. 8).
- Set the pin of the electromaghet (see par. 6.2).
- Set the current of the electromagnet (see par. 6.3).
7. Backtacking using electromagnet
7.1 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.
7.2 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).
7.3 Setting the position of push-buttons
Caution! Danger of injury!
Switch off the main switch! Before starting the setting
operation, wait until the motor stops!
- By loosening the screws (1), it is possible to set the position of the
holder of the push-buttons (2) in the sense of sewing.
7.4 Change of the function of push-buttons
The Function of the push-buttons can be changed in accordance with
the possibilities given by the stopmotor (see instruction for use of
stopmotor).
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