SOLVED: New XR table binding and racking real bad at the ends at 400ipm

[Knick]

Are these what your talking about?

If so, these need to be straight and parallel with each other.
The gantry will roll back and forth very easy and no binding. You will need to remove the ball screws to check. Also make sure your frame is square.
When I di mine I just followed the instructions then I use a string to make sure the rails were straight.

Assembly tip ( Y Axis rails)

When I installed my Y access rails I used a string to make sure they were straight from one end to the other. Pictures show how I did it with string. Clamp string at each end, get 3 shims all the same thickness put one at each end and use the third to measure with. Adjust the nuts in and out until your shim just touches the string. you should be able to get them with in .015". [IMG_6381] [IMG_6382] [IMG_6383]