Re: [CAD_CAM_EDM_DRO] replacing servo motor help >signal phase

On Thursday 19 January 2006 09:54 pm, Jon Elson wrote:

> Owen wrote:
> >So to anyone that has followed this thread.
> >
> >I did get a technician to take a look at the motor and he told me [I
> > called him back to explain in english for me] that "The signals coming
> > out of the encoder are supposed to be 90 degrees out of phase but your
> > are coming out 180 degrees out of phase. I can't see a way to adjust
> > that."
> >
> >Do this sound correct?
>
> If the alignment between the encoder and the disc has been disturbed,
> this is completely possible, and will totally screw up anything trying to
> interpret the encoder signal. You might look closely for some
> "glyptal" on the screws that hold the encoder read head in place.
> Glyptal is the brownish glue that is used to seal alignment screws
> in place once the alignment is set right.

All sorts of goop has been used for this purpose...

> It may show that the head has been bumped out of place, and you may even be
> able to gently shove it back into place. If this fixes it, you can then put
> a tiny speck of superglue over the glyptal to hold it in place.

I keep a bottle of clear nail polish on hand for this purpose, not superglue!
That's too permanent a solution, in case you don't get it exactly right...

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