Steel Framed Router

[Jonathan]

25mm ballscrew is also not recommended for a machine this size, you've probably gone with 25mm because of the 10mm pitch not being available in 20mm.

Maybe 16mm screws with 10mm pitch - RM1610.

25mm screws are large and they produce a lot more inertia which has to be stopped and accelerated this means big strong motors needed amongst over things which all make it not ideal.!

I was about to suggest looking into using rotating ballnuts...

You could go with rotating the nut but it gets a bit more involved, thou does work well if done right.

But you beat me to it! You might be interested in how I did the rotating ballnuts on my machine:

http://www.mycncuk.com/forums/showth...t-design-ideas

They work well, so I guess I did it right.

I agree with using belts and two ballscrews on the X-axis. Spacing the bearings further apart will help prevent the gantry racking a bit, however it's still not ideal.

i wouldnt look at my build for any design inspiration,its a bad build and a lot of good materials wasted,im on the verge of scapping most of it and starting again:tup:,

Oh don't say that ... you're doing yourself a disservice. There's still room for improvement on mine and there always will be. The distance parallel to the X-axis from the Y ballscrew and cutter is far too great on my machine for instance.