I have a Knitmaster 700 and an SRP60N ribber, I have been using it for about 2 months working fine. Being a beginner I bought a book to teach me everything about the ribber, first lesson learning what the levers do, after running the carriages across a couple of times without yarn,they are now getting stuck but both carriages will work if I take the ribber arm off. The needles on the main bed seem to have a pattern of 7 knitted 4 left 7 knitted and then get stuck. I have never used the punch card. Has anyone got any idea why this should suddenly happen, I have checked that all the levers are in the right place.