Check the specs on the prox switch you want to use.   Some are fairly 
slow to respond.
Probably an attempt at noise reduction.

Dave

On 11/24/2014 6:19 PM, Leonardo Marsaglia wrote:
> Hello guys!
>
> I found some 360 ppr encoders that are really cheap on ebay. Here's the
> link:
>
> http://www.ebay.com/itm/NEW-Incremental-Rotary-Encoder-360p-r-6mm-Shaft-5-24vdc-/290778909653?pt=LH_DefaultDomain_0&hash=item43b3c60bd5
>
> The matter is they only come with A and B pulses, no index pulse
> capabilities.
>
> I was planning to use them for a spindle and I thought about replacing the
> Z pulse to reset the counters and stablish the zero position using an
> external proximity sensor mounted somewhere on the spindle. Do you think
> this is a good approach?
>
> The other option is to reset the counters counting by software but I would
> lose the zero position everytime I turn of the machine so a physical zero
> would be ideal.
>
>
>

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