One use I can think of for a low precision sensor is that you should be
able to home faster.   The motor can run at full speed until it gets close
then slow just before it hits a mechanical switch.   For this use case 10%
error is good enough.

On Wed, Aug 9, 2017 at 9:40 AM, Stuart Stevenson <stus...@gmail.com> wrote:

> Hi,
>
> Positioning the laser with magnets seems like an invitation to disaster.
> The laser WILL get bumped or jiggled out of position. Hopefully, the out of
> position would result in the machine not moving instead of moving to the
> wrong position.
>
> Using the laser to establish rough position (therefore eliminating  the
> need for a limit switch) to allow homing from the startup position seems
> "reasonable" if you can determine the laser position is repeatable enough
> to catch the encoder index mark on the correct rotation.
>
> To me, if you plan to home the machine, this sounds like a solution in
> search of a problem although I don't know the complexity of installing
> limit switches.
>
> thanks
> Stuart
> ------------------------------------------------------------
> ------------------
> Check out the vibrant tech community on one of the world's most
> engaging tech sites, Slashdot.org! http://sdm.link/slashdot
> _______________________________________________
> Emc-users mailing list
> Emc-users@lists.sourceforge.net
> https://lists.sourceforge.net/lists/listinfo/emc-users
>



-- 

Chris Albertson
Redondo Beach, California
------------------------------------------------------------------------------
Check out the vibrant tech community on one of the world's most
engaging tech sites, Slashdot.org! http://sdm.link/slashdot
_______________________________________________
Emc-users mailing list
Emc-users@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/emc-users

Reply via email to