Hi,
What is your mill?
Does it have stepper motors or servo motors?
What position feedback (ie. encoder, scale...), if any, do you have?

thanks
Stuart


On Wed, Aug 9, 2017 at 1:41 PM, Dan Bloomquist <z...@lakeweb.net> wrote:

> andy pugh wrote:
>
>> On 9 August 2017 at 18:40, Kirk Wallace <kwall...@wallacecompany.com>
>> wrote:
>>
>> For an absolute position sensor, I'm thinking that a section of tape from
>>> a
>>> tape measure glued to the slide would work well in conjunction with a
>>> screw
>>> dial or pointer.
>>>
>> Maybe something like I found on eBay.
>> http://www.ebay.co.uk/itm/Renshaw-Reader-Head-/332301624409
>>
>
> <http://www.renishaw.com/en/rgh22-incremental-encoder-system
> -with-rgs-linear-scale--6443>
>  .3 um error, that is impressive.
>
> Best, Dan.
>
>
>
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