Re: [CAD_CAM_EDM_DRO]DC motor-Monday

Thanks Jon and old Bob:
     I will be checking things out Monday and let you both know more.  I also have paid for the CNC workshop and plan to be there.  I may bring a truck load of extra parts down to sale for those that can use them.
                                                          GOD'S BLESSINGS
                                                                       Bill T.

On Fri, 14 May 2010 23:06:07 -0500, Jon Elson wrote

>  
>
> William Thomas wrote:
> > What I am wondering about now is how to get the motor up and running at some speed so that I can just start to check some of the other systems out. Then after I have the basic lathe running I can start to work out the NC control system and the changes he made before I get into the drive motor control. Thanks for all your time and help. I didn't get to see you at NAMES this year. Are you coming to the CNC Workshop in Ann Arbor?
> >
> I have a bunch of work here, so I had to skip NAMES this year. I was a
> little worried about the smaller venue, also. I definitely will be at
> the CNC Workshop, though!
>
> My guess, knowing almost nothing about the Cadillac lathes, is that they
> probably also use field weakening plus armature control.
> I suspect it might not be a real big problem to find drives for this,
> especially if you were to get separate drives for the field and armature
> and control them through two analog outputs from the CNC control.
>
> Now, maybe they are not using field weakening, and any standard Baldor
> or similar DC drive will work. As for just spinning the motor, you
> could probably apply rectified mains AC for the field winding (check the
> voltage first, but they usually are either 90 or 180 VDC).
> Then, you could apply a car battery to the armature winding and spin it
> slowly. Of course, you really need to read the nameplate on the motor
> to know for sure what it really takes.
>
> Jon
>
>

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