My Budget CNC Router

[martin54]

If your using pipe then I would be inclined to put it top & bottom as was suggested on your other post. Being new myself I don't know for sure but it would seem a much better way of setting it up.
The leadscrews are only 10mm which may not be suitable over the length of the machine plus what are you going to do about bearings for the leadscrews both fixed & free end.

[Nealieboyee]

You mean like this? I thought about that, but how do I make the red mdf part sturdy so that it doesn't flex upward from the weight of the gantry? Any flex at that point would mean the bearings don't make good contact with the rails.

I will be using 10mm bearings for the lead screw, one at each end. The total length is only 700mm, so its not a 8x4' machine that needs a massive leadscrew, surely? No?