will only sew straight stitch, even that the tension varies from part to part. Won't sew any of the built in stitches with any consistentcy.Sometimes does not pick up bobbin thread and lock so no stitches made at all. Other times sewing zigzag or other preprogrames stitch, it will skip a few and just sew a straight line then return to pattern. Every couple of minutes it either breaks thread in needle or starts beeping that machine is unthreaded. Have to sew with eye on threading loops as thread often jumps out of threading guides. Won't sew any embroidery patterns as does not lock bobbin thread, so can't get project started.
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