ı convert hp deskjet 820c printer to plotter.ı use a homemade cnc mill table , and hp 820c printer head mechanizm.the printer head mechanizm moving with 1,8 degree unipolar stepper motor.
I goal to print pcb and glass.But printer head mechanizm to slov move ,because hp820c printer own stepper motor 7,5 degree unipolar stepper motor.Letters are print one on the top of the other.I purpose make a circuit to convert hp 820c printer stepper motor pulse to apply pic 16f 84 stepper motor driver .how ı convert printer step motor exit pulse to apply pic 16f84 stepper motor driver? I need circuit and advice .Thank you.