Won't the column bend, letting the table rotate, perhaps in a way that might be unsymmetrical.
There might be issues with the ballnuts/leadnuts not wanting to handle the weight, as perhaps the those parts that support the weight of the machine head should be heavier.
Perhaps the z-axis movement might not be as precise/repeatable as the other two, without the weight loading on it.
Ground fault protectors are our friends.
Just playing the devil's advocate. |