Ready Steady Eddy

[EddyCurrent]

That's Fig2 then, thanks.
I also decide to get some new bearings for the blocks because the backlash on the China bearings was serious. I fitted a shim between the outer races but with the locknut fitted there was still slight play, the shim was the thickness of a Guinness can which in this application is thick. I also took a skim off the block to make sure the outer races were being clamped.

Also I'm sure I have a bent ball screw on the Y axis, it's not something I've done myself, on the last 1/3rd of it as you rotate it by hand it goes, slack,tight,slack,tight,etc. and using inside calipers between the screw and the gantry the gap goes big,small,big,small,etc. I'm not 100% yet but it might be the turned down section on the end is off centre.

I may have to get into this

http://www.roton.com/screw_shaft.aspx