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This guide will fix the thread tension on a Juki DDL-8700 lockstitch industrial sewing machine.
When working on sewing projects, you often change the fabric and threads that you use. With this, the sewing machine tension must be adjusted before sewing. Without proper thread tension, loops and bundles of thread (bird nests) can be created, rendering the sewing machine almost unusable.
This guide will demonstrate how to fix thread tension issues, returning the machine to working order.
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Thread the machine.
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Insert the bobbin case.
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Sew a straight line on scrap fabric to test thread tension.
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Check the fabric for loose thread tension.
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Create a baseline thread tension for the bobbin case by tightening or loosening the screw on the bobbin case.
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Reinsert the bobbin case into the machine.
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Sew another straight line on the scrap fabric next to the previous line.
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Check the front and back thread tension of the scrap fabric for loose stitches.
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Check the thread tension by sewing another straight line on the scrap fabric next to the previous line.
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Check the front and back thread tension of the scrap fabric for loose stitches.
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Repeat steps 5-8 as needed to achieve a consistent thread tension without loops on top or bottom of scrap fabric.
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