1)Dahao 328 computer . 2)Use double touching points type thread break detection device realizes the break detection of the under thread by adding the touching point for detection. 3)X,Y pantograph dahao servo. 4)Speed is 850rpm.the speed is not down under 8mm stitch length.(long needle as same speed asnormal needle.) Raise control precision and embroidery design quality.this is efficient,energy conservation embroidery machine.