9. Sewing test
A sewing test must be carried out when setting-up is complete.
–
Insert the mains plug.
Caution: danger of injury
Turn off the main switch.
The needle and looper threads may only be threaded with the sewing
machine switched off.
–
Thread the bobbin-winder thread (see operating instructions,
section 6.5).
–
Turn on the main switch.
–
Lock the sewing feet in the up position ( see operating instructions
section, 6.10).
–
Fill the bobbin at low speed.
–
Turn off the main switch.
–
Thread the needle and looper threads (see operating instructions,
sections 6.1 and 6.6).
–
Select the material to be processed.
–
Carry out the sewing test, first at low speed and then gradually
increasing it.
–
Check that the seams are of the requisite quality.
If not, alter the thread tensioners (see operating instructions,
sections 6.2, 6.4 and 6.7).
If necessary the settings given in the servicing instructions should
also be checked and corrected
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