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Operation
Operating Instructions 610/630 - 00.0 - 05/2014
5.7.3
Adjusting the needle thread quantity
WARNING
Risk of injury from moving parts.
Switch off the sewing machine before adjusting the
thread regulator.
The needle thread quantity released for stitch formation is deter-
mined by the thread regulator setting. The required thread quantity
depends on the thickness of the sewing material, thread strength
and seam type. Furthermore, the threading process is different
for different threads and seam types (Page 28).
Fig. 13: Setting the thread regulator
(a)
(b)
(1) – Fastening screws
(2) – Thread regulator
Correct setting
• Less elastic threads: The hole (3) of the thread lever is visi-
ble in the thread lever's bottom position just above the lower
bar (4) of the thread regulator: position (a).
• Very elastic threads: The hole (3) of the thread lever is visi-
ble in the thread lever's bottom position just below the lower
bar (4) of the thread regulator: position (b).
(3) – Hole of the thread lever
(4) – Thread regulator: Lower bar
33
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