I have the FLA100 kit from
Store: FLA100-00 : Fine Line Automation

The x-axis seems to get some whipping with the screw rod. Not sure what I did wrong and how to stop it. I would appreciate any help on this problem.

Thanks

If it's whipping, the RPM is too fast.  Slow it down.  If your speed is not fast enough after slowing to where you get no whipping, you'll have to go to a courser screw pitch...or a screw with multiple starts.

First check the screw by taking it out and rolling it across a flat table. If the screw flops around there it is a sign that it was not straightened after grinding. If the screw is not straight there is not much you can do to help except straighten it. Even with a relatively straight screw, if it is only supported on one end, you'll be limited to how fast you can turn it. Supporting the screw on both ends, under a bit of tension, will help keep it from whipping.

Thanks for the replies -

It is supported at both ends. If I hold my finger against the top of it while it turns, there is no flopping around. I will pull it off this weekend.