I have built my first CNC machine based on a design from many influences. So far I have been very happy with its performance on timber, however the main reason for the build was to be able to cut aluminium. The problem I have been having is the cutter has a tendancy to vibrate, and sometimes jump across the cut. From what I can tell, this is because the axis deflects rather than forcing the cutter into the cut, and then it sort of "catches up". Sorry my description isnt the greatest. I am looking for any ideas on how to strengthen the interface between the X & Z axis, and the Z axis itself to try and increase rigidity in this area. At the moment, the design has a 1m wide X axis, which faces away from the router. The Z axis is floating - the lead screw nuts are fixed to the gantry plates, and wheels keep the Z axis in place. I am open to any and all ideas from the community!