Re: Encoder Indexer Option --- opening up steppers.......and modfying shafts...

...and others would just buy a 5/8" encoder :)

I didn't want to take apart a new motor...or anyone of them for the
simple fact that...yes, I know I can be ham fisted at times...and
have scraped the magnets against the rotor before. I wanted to avoid
machining anything...mainly because I don't have a lathe.

-Brady

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

>
> --- In CAD_CAM_EDM_DRO@yahoogroups.com, R Rogers <rogersmach@y...>
> wrote:
> > I've never heard of that not touching the magnets deal. Sure
> wouldn't operate like that. I had all mine apart to remove the

brakes

> and the armature and magnets touched. Didnt seem to impede them in
> any way. Maybe it is a no-no. But, I find it hard to understand. I
> could see a long period of time being detrimental.
> >
> > Ron
>
> The motor de-rating has been documented for stepper motors by

Mariss,

> who also has a very accurate means of testing torgue.
>
> The big deal with steppers also comes into play about how ham

fisted

> we are. dragging the rotors and stators against the case and

magnets

> is almost a forgone conslusion unless you have some means of
> maintaining the alignment axialy.
>
> The bits of scrapings then effect the health of the motor and tend

to

> bind and scrape and make more bits that bind and scrape....
>
> as for 5/8 shafts and encoders.....
> Many of us with lathes would be more than happy to pull the motor
> apart and turn down the shaft. Others would just make a sleve

with

> a 1/4 post to slip over the shaft. still others would drill and

tap

> and thread in a 1/4 shaft, while others would just drill and ream

and

> use some bearing locking stuff to permanently attach the small

shaft.

>
> It's part of the fun part of the whole machine building process.
>
> Dave