Re: hacking a servo

How many wires attach to your encoder? Are the wires color coded? Is
the motor a DC brush-type motor?

Mariss

--- In CAD_CAM_EDM_DRO@y..., "dave_ace_me" <davemucha@j...> wrote:
> Hi all knowing and all seeing List,
>
> I am lucky that I was able to salvage a bunch of NEMA 23 steppers,
> both uni and bi-polar and two DC motors, with brushes, with encoder
> attached from three old printers.
>
> Knowing little about servo's I assume that these two DC motors,
> (about 5 inches long and about 2.3 inches in dia) are useable
servo's
> for CNC applications.
>
> since I am a little on the slow side, I trashed the matching
circuit
> boards and cables to the lot so I don't have a clue on how to hack
> the servos to determine the pin out.
>
> To make matters worse, I am 90% complete on mounting the steppers
> with timing belts and mounts and all. I even got my drill press to
> put a few holes in steel plate with a 5V PC power supply and a 5V
1.5
> Amp NEMA 23 Unipolar (hey, it says 5 V right there on the label!)
so
> at least I have motors that can handle my load.
>
> Now that I am getting edumacated quickly, I am finding I have made
> mistakes all over the place. (at least I got the machanics right)
>
> any idea on how to determine the pin-out for a servo's encoder ?
>
> Dave
> (those Gecko's are looking better all the time !)
>
> mistakes so far: (or what I have learned)
> -> zero speed, with load = HIGH amp draw and well above the 4 amp
> fuses
> -> a 120 inch lead screw will take forever to travel 120 inches and
> back.
> -> presision lathe work, manually done is easier than the
electronics.
> -> I am too quick to throw away parts that I don't understand
> -> buying more Delrin and bearings and shafting than I absolutly
need
> is a smart thing.
> -> assuming that it is as easy as it looks isn't