Features 1. The column and boom are manufactured with cold-formed welded type structure. After the annealing process and finish machining, they possess fine rigidity and strength. 2. To ensure safety, the boom lifting device uses a ratchet-and-pawl structure and is equipped with a fall protection device. 3. Frequency control is applied for the adjustment of retracing speed, greatly improving the reliability and stability of the fixed welding manipulator. 4. The front end of the boom is manufactured with a cross adjustment structure which can be adjusted through the manual control box. 5. The eight guide wheels all utilize eccentric structure. During installation and set up, the lead rail tension can be adjusted by using the eccentric shaft. After this adjustment, the rail should be locked with double nuts. Fixed welding manipulator (column boom manipulator) 6. The column rotation can be carried out with manual and electric control then locked. 7. The electrical equipment of the fixed welding manipulator includes a manual control box and electric cabinet. 8. Trolley, manned seat and worktable, drag chain, seam tracing and monitoring system, and flux recovering system are optional. Clear packing.