A chiropractic adjusting instrument comprising a housing thrust nose piece 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 pulse system operatively connected to a power source to provide alternating current for energizing the solenoid to impart impulse energy from the core to the thrust nose piece which is reproducible and independent of the power source and a trigger system for triggering the electronic pulse system comprising a switch activated by the preload switch plunger. Preferably, the chiropractic adjusting instrument includes one or more of the following: an intelligent universal AC power converter optimized force-time waveform pulse mode operation a sensing device having a sense output and a suite of electromechanical components designed to promote reproducible dynamic force impulses and safe operation.
