Operating instructions

Operation
Operating Instructions 650-16 - 01.0 - 06/2014 27
Figure 5: Main tensioner
Steps
1. Set the main tensioner (1) via the control panel so that a even
stitch pattern is achieved.
Opening
automatic
When the thread is cut, the main tensioner (1) is opened automat-
ically.
5.3 Setting the thread regulator
The thread regulator regulates the amount of needle thread
required for forming the stitch. An optimum sewing result is pos-
sible only when the thread regulator is exactly adjusted.
Correct setting
With the correct setting the needle thread loop must slide over the
thickest part of the hook at low tension.
When the largest thread quantity is required then the thread
tension spring (3) must be pulled approx. 0.5 mm down from its
upper end position. This occurs when the needle thread loop
matches the maximum hook diameter.
(1) - Main tensioner
1
Risk of crushing by moving parts
Switch the sewing machine off before setting the
thread regulator.
WARNING