Proxxon KT 70 / MF 70 - Home Made CNC with printer step motors - drawing test

I&performing a drawing test on my home made CNC micro mill built using a Proxxon KT70 cross table and step motors and drivers recovered from old ink printers.. The noise which you hear when the motors turn at low speed is because these motors have only 48 steps per revolution, so at low rpm they don&run smooth. The sound playing in background is "Sample and cut discipline"