Performance enhancement of multiple axes servo control system for laser machining robot

Precision high speed multi-role laser machining robots employ a specialized approach. Multiple axes precision servo control at high speed but moderate fixed load torque is a combination for which low cost stepper motor driven servo control loop appear as strong candidate. A new efficient high speed drive technique combining advantages of the Bi-level drive as well as the chopper drive method has been developed to enhance the servo speeds considerably. Small as well as medium size motors can easily operate with optimum low cost power single source in a system and high speed operation is achieved with a single parameter that is amenable to direct digital control. Higher current capacity and high speed have been designed employing a ubiquitous devices like PWM controller L-297 (SGS Thompson) and several other complimentary circuits