The seam is breaking open, how can I prevent this from happening?

The machine does not feed material through properly – why?

How to I determine seam strength?

Stitch type, seam type, thread type and size etc. play vital roles in seam strength. Choosing all these properly can enhance seam strength. A generic formula is available to determine seam strength: For lockstitch = Stitch per inch (SPI) x Thread breaking strength (STS) x 1.5 For chainstitch = Stitch per inch (SPI) x Thread […]