Question about Sewing Machines
First, a #14 needle is probably too large for t-shirt fabric. Also, be sure to use a ball-point needle for knits. This link will help you determine which needles to use when:
All About Needles
When you thread the upper thread, be sure to ALWAYS RAISE the presser foot so the thread seats completely in the tension disk. Start off with the tension set midway between high & low numbers. Then, tweak it for your particular machine. The tension is correct when the upper and bobbin threads meet in the middle of the fabric. HOWEVER, even if the tension is correct on t-shirt fabric, you will probably need to alter the tension when you decide to sew denim or chiffon. The upper tension is not meant to be static and needs to change based on your project.
If you think the upper tension is set high and still is not pulling the bobbin thread up enough, you may need to tighten the bobbin tension. BUT, that is a big decision because it is easy to get it way out of kilter. Always mark the screw notch position on the bobbin case with nail polish before making any adjustments. That way, you can always return it to the beginning point if your adjustments are off. AND, remember, turn only 1/8th of a turn at a time. Bobbin adjustments are tiny!
Understanding Thread Tension Threads
Sewing Lesson 10 How to Fix Tension on Your Sewing Machine
How to Adjust Sewing Machine Tension on Craftsy
Posted on Dec 16, 2016
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Posted on Jan 02, 2017
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