27
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 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.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).
6.3 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.
6.4 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).
1
3
4
2
2
1
1
2
3
4
5
6
