How to make Lead Screws work

[tr6scott]

I had contacted igus for recommendations, and help calculating, but seems the team is going a different direction. I'm electrical mentor, so don't ask any questions of me, just posting as it may help others.
I was hoping for a solution that would not backdrive, but to get the speed we wanted 2 seconds up, 2 seconds down, that was not going to work, so if you use this solution you will need to power motors 100% of time or add some brake mechanism to hold the load.

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- How far apart will the 2 lead screws be located?
Distance between the two lead screws will be between 18" and 22"

- Where will the center of gravity be in relation to the nuts?
The cg of the totes will be 2" off the center of the nuts.

- Will you be using a liner guide as well?
Yes, we plan on using some Alum extrusions (Acme, 80-20 with their slides componets)


Please confirm?
- 60 lb load
- 2 foot stroke
- 1 foot/second

Due to the speed a high helix nut will be needed. Unfortunately the high helix are not available in the anti-back lash version. Please advise and I will get the report over to you.