As others will advise, a slotted disc directly on the stepper is your best
option. It's the finest resolution you'll achieve for a low cost. Here
<https://www.google.com/imgres?imgurl=http://i57.photobucket.com/albums/g227/DBAviation/XHomeDisc.jpg&imgrefurl=http://www.cnczone.com/forums/dyna-mechtronics/150638-dm-3000-dyna-mach3-conversion-7.html&h=600&w=800&tbnid=XslrSg8Q_vPFYM:&docid=zVVCDTS4cbXLVM&ei=KbXCVqyoK4HsateKs6gO&tbm=isch&ved=0ahUKEwjs4M6GyPvKAhUBthoKHVfFDOUQMwgtKBAwEA>
is a typical example I found on the net, although I'd make the cut-out just
one quadrant.

Regards
Roland


On 16 February 2016 at 02:02, Bertho Stultiens <[email protected]> wrote:

> On 02/16/2016 12:53 AM, Dave Cole wrote:
> >> Has anyone numbers on the repeatability of "normal"
> >> micro-switches?
> >>
> >> Micro-switches are (relatively) cheap and mostly not too shabby,
> >> but I have a not seen any hard data on repeatability (other than
> >> datasheets saying that they are made for repeatability).
> >
> > If you have a marker pulse on an encoder you can use a cheap home switch
> > and back off to the marker pulse.
>
> Yeah, but it is a cheap stepper system, so no encoders there.
>
>
> --
> Greetings Bertho
>
> (disclaimers are disclaimed)
>
>
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