MICRO-STEPPING COMMAND OF HYBRID STEPPER MOTORS USED FOR ELECTRODE TOOL DISPLACEMENT OF SINKING EDM-MACHINES
In the first part of this article, the authors make a short presentation of electrode tool displacement control system for sinker electrical GAGS discharge machining.The advantages of stepper motor used in kinematics chain are also mentioned.In the second part, the authors compare the principal type of current control trough the coils of the two ph