Re: [CAD_CAM_EDM_DRO] Re: I'm confused, which are better uni or bi polar ?

dave_ace_me wrote:

> Hi Jan,
>
> I do appreciate your reply and you should not feel bad.
>
> I on the other hand.....
>
> ...pulled apart the old Xerox electric typewriter, trashed the cases,
> the cheap printhead and associated slides, and the 6 cards in the
> card rack. Of course I kept the power supply.
>
> Then after the trash guys picked up this morning, I realized I had
> just trashed a matched driver board to the pair of steppers.
>
> I guess the lesson is to not do things in your sleep.
>
> I am saving the two DC motors with attached encoders that I assume
> are servos. but that is another story.

The encoders are magnetic, a variety of rotary inductosyn. You also
trashed the circuitry to read them. Usually it is on a bunch of big
1" x 2" metal cans that apparently were Analog Devices 1S80 or
similar devices but with proprietary labels (and probably internal
features, too).

Jon