The most suitable types of circular knitting machine for knitting scarf is double knitting machine. Double knitting machine is widely used in textile industry.
Double knitting machine can knit various types of fabrics. To knit scarf, double knitting machine should be equipped with a standard gauge and a ribber firstly. If you want that look without a knitting machine or double circular needles, you could knit it flat in stockinette and than seam it inside out. Using double knitting machine can improve output and save cost.