You may need to adjust the tensions for your serger with just about every change in stitch, fabric, or thread type. Relax, with just a little fine tuning, you and your serger will be humming along again.
How-To: Tame your Serger
Tension mechanisms control the interlocking point of your serger thread. It's important to know what a balanced stitch looks like and which tension dial controls each thread. Check your serger's manual for specifics.