Hey scotthubic,
I would check the points in Troubleshooting: Rail is getting hung, stuck, or out of alignment (x35/x50 machines) one by one. Note that this support document contains the hint to be on the latest firmware, but as of this writing, this will lead you to 1.2.1, however if you look at the 1.2.1 thread, it might well be the “Latest firmware”, but not the “Latest stable firmware” 
). Latest really stable is 1.0.9 that many people still run without issues.