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Lifting Z is a good stiff design.

But having the X and Y down the bottom is weird.
You have 4 rails on the X axis - this is a lot of added expense, but worse will be the difficulty of aligning 4...

I have seen a similar design in the past (pretty sure it was actually on here somewhere).

It does work, but the Z-axis is a lot of work to get everything spaced correctly, and restricts access to...

I fear that you may be headed for difficulties with racking.If you were to place two steppers on the X axis and only one on the Z axis,I believe things might improve.Just imagine the forces on the...

I may well have misunderstood.Could you provide images with the axes,preferably labelled. at both extremities of their range?

I think building a machine is absolutely the best way to have a full understanding of what makes it tick and wish you every success with your efforts.I do wonder if having a relatively long and quite...