hey, thx so much for the detailed explanations .. and with all this talk about probing i finally understood the deeper meaning of your forum alias
so .. sorry to be so thick about this ... my knowledge in electronics tends towards total ignorance, and before attempting any type of electric connections i'm always afraid to electrocute myself so i prefer to ask again to make sure i completely understood ... btw, can i electrocute myself with the current coming out of the motor cables ? can i break the stepper motor or driver PCB if i hook sth up wrong ?
so to take things from the top, this is my pinout:
Attachment 246908
i decided to hook up the new motor in series since it draws the least amount of power .. i really have no idea how much power the machine can supply but in series the motor draws 2A/phase (Unipolar:2.8;Parallel:4.0) and the resistance with this wiring is closest to what it says on the sticker of the old motor: 2Ohms (Unipolar:1;Parallel:0.5) .. but as you know i don't have a clue so this was just a guess . i don't mind losing torque at high speed with this connection cause i'm not running super high feeds and am mostly cutting very soft materials.
if i understood your instructions correctly then this would be the wiring for the headphone probe:
Attachment 246910
is this correct ? this would be connecting the headphones without the motor .. how would i connect it with the motors ?
so 2kOhms is not the right resistor ? again my lack of knowledge in these matters is striking: 1/4 Watt resistor ??? Aren't resistors measured in Ohms ?