Coordinated multi-spindle screwdriving networks that detect thread cross-pitching and guarantee torque-angle tightening curves.
Electric servodrivers monitor torque versus angular displacement at 4 kHz. The controller identifies the rundown phase, seating point, and plastic deformation yield, stopping within ±0.5% of specified torque targets.
Upon detecting abnormal torque spikes before thread seating, the spindle reverses 1.5 revolutions in reverse search mode, locating the thread start before re-torquing, eliminating stripped component casings.