7-9 Upper thread heat cut device
For a secure sewing at the seam beginning, a certain quantity of drawn-forward needle thread is
required. The drawn-forward occurs after completion of seam with the clamps still lowered.
Function sequence of Upper thread heat-cut procedure
The sewing pattern is finished.
The needle stops in the high-position of thread lever.
The needle thread tension open.
The thread puller pulls the required thread quantity forward.
The needle thread tension close again.
The thread puller moves back into its base position.
The presser foot lifted in it’s up-position.
The thread wiper pulls the drawn-forward needle thread into the
The thickness detector lowers on the clamps.
Heating position.
The upper heater lowers.
The thread is heated off.
The clamp move up.
A new sewing sequence can be started.
7-9-1 Setting thread puller
The thread puller must be set so that, depending on the material to be worked, a secure seam
beginning is assured. If the drawn-forward thread quantity is too small, the thread is too taut
during heating, and The thread end doesn’t melt together.
To adjust the drawn-forward thread quantity
(1) Loosen screw (
NO.
).
(2) Move and adjust the thread adjustment plate (
NO.
) in the direction of the arrow
(A or B). (When moved in the direction of A, the thread manual feed amount will
increase, and when moved in the direction of B, the thread manual feed amount
will decrease.)
(3) Securely tighten screw (
NO.
).
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