[dlyork]

Hello,

I have been designing my first cnc router over the past couple of months while surfing around this website picking up bits and pieces of advise on how to build one of these. I don't have any way of machining metal so I decided to use 8020 and cnc router parts linear motion system for ease of construction. Currently I am going through the analysis of my design to get a better feel of how much it will deflect under use. I'm most worried about the cutting platform sagging when the gantry is in the middle. My design right now has two extra pieces of 1530 that are a couple of inches set in from the rails. Would it be better if I just had 3030 along the edges? It will primarily be used to shape foam and cutout skateboards (7-11 plys of hard rock maple). Any advise or insight would be greatly appreciated.

Doug