Home/Technical Glossary/EZ AirĀ® EZ AirĀ® The EZ-Air weld force control system simplifies the set-up process to a single adjustment and helps prevent weld over-force by closing off the input air when the actual weld force reaches the programmed weld force level, delivering accurate force control which is repeatable across multiple weld heads without complex setup or operator training. EZ-Air force control technology is available with AMADA WELD TECH Thin-LineTM weld headsĀ as original equipment and as a retrofit for previously purchased Thin-Line air actuated weld heads.