Quote Originally Posted by chip View Post
looking good jon,this ones allways been a favourite of mine on the tube,very simular,works well.
http://www.youtube.com/watch?v=hAS3GRE61jY
That one does look good, except for the position of the X-axis ballnuts which will cause uneven loading on the X linear bearings.

I'm not sure that the 100x60x3.6mm steel box section I've used on the sides is going to be sufficient. That cross section is weak with forces parallel to the Y axis. I may get some aluminium profile to fit there. Chip, can you remind me where you got yours please? What you used for your gantry sides looks about the right size.