Re: [CAD_CAM_EDM_DRO] Stepper Drive Chips?

Hi Paul,

I think it's something like a darlington transistor (array?). Used for
printer hammer drivers. Might be useful for unipolar motors (watch the
dissipation).

Alan KM6VV


Paul Waller wrote:

>
> Hi all,
> Anyone heard of a chip called a L7180 that used to be made by SGS? I have a
> board with about 40 on it and thought that it could be good to drive
> steppers but I have no info. When I saw the circuit with the L298's on it I
> went to the junk store and dragged it out. I think it may have come from a
> Line Printer. There is also a driver chip called a L6503 Have tried
> searching the net and Chip Directory et. but no luck so far. Seems a shame
> to toss it out.
> I've been following this group with great interest trying to learn a bit
> about CNC and thinking about building a machine to drill circuitboards and
> cut out parts for model aeroplanes. I have built various stepper drivers in
> the past mainly to rotate bits on scientific instruments.
> Cheers,
> Paul Waller
> University of Tasmania
> Australia.