The CWP-7 Programmable Circle Welder (CWP-1700) is equipped for MIG, Flux Core or Sub-Arc welding on vessels and domed heads. The CW-7 has a working range of 6-24" (152-610 mm) O.D. nozzles with no cable wrap up for multi-pass welding. This machine uses a microprocessor to control the rise and fall through encoder position.