... Max speed: 320rpm 3-1/2"plain computerized sock knitting machine Feature: 1,One main feed plus five pattern ... stop motion sensors in case of error.9,Automatic re-cycling oiler,counter,and reset function.10, ... ,Internal UPS can support continuous knitting.16,Graphic type LCD adopted.Plain machine can produce the following:Can ... 5″: 72-220N (3.75″: 72-176N, 4″:96-220N, 4.5″:84-272N)1- 60N for Baby2- ...