Has anyone on here built a dual gantry CNC machine? I would like to build a multi-purpose CNC plasma, routing and drilling table. Just kicking around the idea of making two gantries. One for plasma cutting and the other for routing and drilling. The plasma gantry could be built much lighter to achieve the high acceleration/deceleration requirements. The routing drilling gantry could be built to withstand the rigors of drilling and routing. My plan is to use heavy ballscrews with driven nuts. Therefor the two gantries could co-exist on the same table utilizing the same linear rails and ballscrews. It would be a downdraft table.
Just a thought. Is it a totally bad idea?