A chiropractic adjusting instrument comprising a housing； a thrust nose pieceand an impact head to contact a body； a preload switch plunger； a dampening spring；a solenoid having a core； a preload spring； a recoil spring； an electronic pulsesystem operatively connected to a power source to provide alternating currentfor energizing the solenoid to impart impulse energy from the core to the thrustnose piece which is reproducible and independent of the power source； and a triggersystem for triggering the electronic pulse system comprising an switch activatedby the preload switch plunger. Preferably, the chiropractic adjusting instrumentincludes one or more of the following: an intelligent universal AC power converter；optimized force-time waveform； pulse mode operation； a sensing device havingan sense output and a suite of electromechanical components designed to promotereproducible dynamic force impulses and safe operation.
