... Stepless adjustableMain motor3.7kw Spin motor,1 set inverter control,initative wire pay-off motor 0.75kw,2 set inverterPay-off trayMAXΦ500 ... <250kg,wire pay-off tension 3-10N Main motor 5HP,4PAC motor Tentions range 200g,stable and adjustable Back-twist tension ... device reserve line tension sensor stand,linkage with pay-off motor,ensure constant tension wire pay-off Machine dimension L× ...