Singer heavy duty using upholstery thread. Why is this happening? : r/sewing

SINGER Heavy Duty 4452 Sewing Machine

SINGER Heavy Duty 4423 Sewing Machine

Singer Heavy Duty 4452 15 Holding Threads When Starting to Sew

Ask The Readers: Sewing Machines – Jo's Country Junction

Singer 4452 Review - Heavy-Duty Or Not?

SINGER 6380 Heavy Duty Sewing Machine With Extension Table

Singer Heavy Duty 4423 20 How to Adjust Tension

Why does my machine (singer heavy duty) keep sucking my fabric

Upper thread tension coming loose while sewing (Machine Question