Re: DC motor controller

Hi Dave,Ron,

Pictures...
http://www.flickr.com/photos/26361144@N00/

I took the CW to mean the nut would probably fly off if it ran
the other way. I opened it ...Nothing flew apart.

What's the Bad news...How _BAD_ could they be as servos?

I wouldn't have noticed the very slight cogging if I weren't
trying to find it.


John



--- In CAD_CAM_EDM_DRO@yahoogroups.com, "turbulatordude"
<dave_mucha@...> wrote:

>
> --- In CAD_CAM_EDM_DRO@yahoogroups.com, R Rogers <rogersmach@> wrote:
> >
> > John,
> >
> > See the "CW" for rotation on the motor tag? That means it's
> intended to spin only one direction. Possibly the brushes are mounted
> angular or offset to the shaft allowing only one direction of
> rotation. If thats the case it will not work, for long anyway.
>
>
> I think the CW could mean one of two things. As you mentioned, the
> burshes are not mounted perfectly symetrical, but rather optimized so
> spinning on one directin is more efficent or powerful, or some such.
>
> The would mean the brushes are not dead-on-balls-accurate (an industry
> term) 180.00 degres.
>
> The other possibility is that the thread on the screw is such that if
> the motor spun the opposite way, the pulley would just spin off.
>
> Since these are custom motors, the label could reflect either of the
> above.
>
> Testing would show the differences.
>
> Dave
>