High Speed Computer Button Hole Machine

1.using step motor in feed mechnism and needle machaism,the minimum increment can reach 0.05mm,to realized perfect and stable stitch. 2.it's possible to set sewing speed to front 5 stitch by panel to realize low speed switch on function,to avoid thread broken phenomana when switch on high speed speed. 3.with electrical control ,for the final several stitches when bar tacking which can prevent the thread of from the buttonhole. 4.with the adjustment of tension solenod ,it's possible to meet the needs of different tension at the parallel part and bartack part of buttonhole.