... speed Variable frequency,6-block control ,easy adjustment(operation display), highest speed of 1.6m/sColor system 6 colors ... stitch systemMobile-track servo motor racking ,3-needle space at both sides,adjustment unit of 0.5 needle (one or more ... yarn ,breaking,fumu,trangle machine,density televsion,shutle box,mobile machine,voltage instability (frequency-conversion protection)Control system types, ...