Re: [CAD_CAM_EDM_DRO] Re: Electronics gurus please help

I'm sorry, but I'm not following very well. Is there a block diagram
somewhere that I can look at? This is something I'd like to understand
better.

Thanks,

Steven Ciciora

At 02:01 AM 9/12/02 -0000, you wrote:

>Scott,
>
>The reason for the transistor in the center-tap circuit is increase
>the rate of current removal from the winding at the end of a step.
>Without it, current decays at a very lesiurely rate and severely
>limits the maximum speed of the motor.
>
>Mariss
>
>--- In CAD_CAM_EDM_DRO@y..., "Scott M. Thomas" <scott@d...> wrote:
>> Hmmm. I suppose you could use 6 if you want to. I built one using
>a PIC
>> and chopped the input to the 4 "end" transistors, worked very
>well. I also
>> used a common current sense resistor, so this simplified it even
>further.
>>
>> I'll have to check out the voltage doubling effect, hadn't thought
>of that.
>> But this shouldn't have a huge effect on things depending upon the
>power
>> supply voltage.
>>
>> Thanks