9.3
Sewing test
After completion of the assembly a sewing test should be made.
–
Plug in mains plug.
–
Wind up bobbin thread (see operating instructions chapter 7.5)
Caution: Danger of injury!
Switch off main switch.
Thread in needle and bobbin thread only when the button sewing
automat is switched off.
–
Thread in needle thread (see operating instructions chapter 7.1).
–
Insert hook thread bobbin (see operating instructions chapter 7.6).
–
Switch on main switch.
The control is initialized.
–
Choose workpiece to be processed.
–
Make sewing test at low speed first and then at a continuously
increasing speed.
–
Check whether the bartack pattern corresponds to the required
demands.
If the requirements are not met, change thread tensions (see
operating instructions chapters 7.2 and 7.7).
Possibly the adjustments indicated in the service instructions have
to be checked, too, and corrected, if necessary.
–
Check the oil level at both inspection glasses during the operation
of the button sewing automat.
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