Bernette b68 AIRLOCK - Threading the Looper Thread with an Auxiliary Thread; Using the Threading Wire

Threading
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2022-05 EN 50400685.00A.04
Threading the Looper Thread with an Auxiliary Thread
If a looper thread cannot be threaded automatically with the air threader, the use of an auxiliary thread
makes sense.
Prerequisite:
• Threading is prepared.
> Open the threader cover.
> Move the air threader connector to the left.
> Slowly turn the handwheel counterclockwise until the air threader pipes couple.
> Prepare an auxiliary thread at a length of about 60cm.
> Fold the auxiliary thread in half, hold the thread end with the loop in your hand and position the two
thread ends above the respective air threader nozzle.
> Start the air threader process until the thread ends of the auxiliary thread emerge out of the looper eye.
> Place the looper thread end at the length of about 20cm through the loop of the auxiliary thread.
> Pull the auxiliary thread ends until the thread exits the looper eye.
> Remove the auxiliary thread.
> Place the looper thread under the presser foot to the rear left.
Using the Threading Wire
If the air threader cannot be started for threading the looper threads, the use of the threading wire is a
threading option. The threading wire is a wear part and not designed as a permanent threading or cleaning
aid.
Any malfunctions of the air threader system must be repaired by an authorized bernette dealer.
NOTICE
Damage by Improper Use of the Threading Wire
The air threader pipes may be damaged. A repair by the authorized bernette dealer is required.
> Insert and pull through the threading wire only in the thread flow direction.
Prerequisite:
• There is no thread in the respective air threader pipe.
• Threading is prepared.
> Open the threader cover.
> Guide the threading wire end without loop through the corresponding air threader nozzle until it exits at
the looper eye.
> Place the wanted thread through the loop of the threading wire.
> Pull the end of the threading wire until the looper thread exits from the looper eye.
> Place the looper thread under the presser foot to the rear left.
> Close the threader cover.