Re: [CAD_CAM_EDM_DRO] Mystery Controller

Hi Voli,

What's on the controller board? What IC's? what electrolytic caps? If
you have three "driver" chips on the board (trace them back from the
stepper windings), you may be able to look up the IC's, and find their
input pins. that would tell you what to drive it with. A cap on the
motor supply line will indicate the voltage. If the steppers are quite
small, they may be driven unipolar, from what amounts to a relay driver
IC. Sprague? Floppy disk drives often do this.
12V, six wires for the motors, I'm gonna guess that the board has
unipolar drivers, and wants 12V for the motors. Not much power there!
NEMA #17 motors?

HTH

Alan KM6VV
SherlineCNC list


volitan712003 wrote:

>
> Hello Group!
>
> An impulse buy from e-bay netted me a small assembly which has 3
> small steppers on it as well as a controller/driver(?), and a slew of
> roller switches.
>
> The board appears to be proprietary, from TOA Medical Devices in
> Japan.
>
> My question is, is there a safe way for me to determine how this
> works? I see where the steppers (12 volts,6 wires each) plug in, I
> see where the power goes, although I don't know how much to start
> with and there's a 16 pin ribbon cable which I'm guessing is where it
> is controlled from.
>
> Can anyone help?
>
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