Don't be so hasty to poo-poo the idea. You could go for a fixed gantry, in which case there would be little weight on the long rails, or, have the x as a shorter axis, and use the longer rails as the y. They will still sag, but the amount will be greatly reduced. You could even cut the rails down a bit.
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(Note: The opinions expressed in this post are my own and are not necessarily those of CNCzone and its management) |