could any one tell me if i was to run two ball screws for the y axis what is the best or most practised way of running them as a pair? im my mind i am thinking there are a few options, i have had a search but not found to much as im not to sure on the terms used for this. Is it better to run two motors one on each or put a motor on one and have a belt going across to the other or have a centrally mounted motor with a belt going to each?

Also After a few people have mentioned it i am wondering if i would be better go for a hybrid closed loop stepper system due to the length of the x? servos are defiantly way out of my budget but is closed loop worth considering? can you run it on just one out of the 3 axis then upgrade the rest later?

cheers charlie