Sew and cut the threads.
Pull the bottom thread. If its tension is too low (the thread under the
spring can easily slip out), tilt the hook cover up and slightly bend the
spring
1
downwards with a screwdriver.
Repeat the seam sewing, do the thread cutting, perform a test of
the tension needed to pull the thread out, and slightly bend the
spring, until the thread is reliably retained with the spring.
Requirement
The clamping force of the spring
1
should be high enough so as
the tension needed to pull out the bottom thread is approximately
the same as the tension needed to pull this thread from the hook
bobbin.
Adjustment
7.04.04
Bobbin thread clamp
1
48
Caution: Danger of injury !
Turn the main switch off.
Only adjust the clamping spring when the machine is turned off.
Attention !
Sewing problems can result when the clamping spring is improperly
adjusted.
