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Bernette Airlock b64 - Sewing Test and Stitch Optimization; Performing a Sewing Test; Optimizing Stitch Patterns

Bernette Airlock b64
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Sewing test
62
2020-09 EN 5040064.00A.04
8 Sewing test
To check the optimal setting, a sewing test should be sewn on a spare piece of the fabric used for your
project.
The default values of the stitches represent recommendations that work for most standard applications.
Depending on the sewing test, fine adjustments for stitch optimization are possible.
8.1 Performing a sewing test for an overlock stitch
Prerequisite:
(see page33)
> Place the fabric under the presser foot to the front of the knife so that the desired seam allowance is cut
off.
> Press the Foot Control and sew slowly. Guide the fabric gently as the machine automatically transports
the material.
> Sew beyond the fabric end such that a thread chain is formed.
> Pull the thread chain over the Thread Cutter.
> Assess the sewing test and make any necessary adjustments until the stitch setting matches the material
combination.
8.2 Optimizing stitches
Optimizations of stitches should be made systematically. In the following, recommendations are listed for
each stitch type, which optimize the stitch pattern through specific changes to the machine setting.
> Perform one action step after another, starting from the top.
> Reduce the Thread Tension in the first place before increasing the Thread Tension.
> Alter the Thread Tensions only by half or one digit at a time.
> Perform a sewing test.

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