Newbie from NZ

[Doddy]

Thanks
Can You "suggest " an encoder and controller setup that would do what you mention. Im not sure where (or How) a Home microswitch would be wired into the circuit to reset-recalibrate.
If not too much bother could you please give me a diag (or lead me to where i would find one) with the encoder wire and microswitch.
I do think those chinese motors would not work as they just too small. I don't want to WASTE time and money . I will have to shorten the ballscrew slightly to fit the wider gearbox in as well

Andy if your still around do you think the new motor link above will be better choice of power for the ballscrew ?

I'm "thinking" that you're looking for an off-the-shelf solution, and there are such things readily available. For example.

https://www.amazon.com/uniquegoods-W...gateway&sr=8-1

All you need are two limit switches. The instruction manual (linked at the bottom of the page on Amazon) shows how to attach two NPN proximity switches (https://www.amazon.com/Twidec-Induct...s%2C204&sr=8-7 and from the photo that you provided in post 12, I'd simply drill two holes in the side-wall an inch or so above the moving sled, one at each end of travel, and fit the proximity sensors there; Add a short piece of angle steel attached to the bolts on the linear blocks (you show 8 bolts in the image) to project up to provide a moving vane to actuate the proximity sensors when the sled is in the two end positions.

Job done.