So now that I've got the machine running and cutting parts, I'm thinking alot more now about a total redesign. As predicted by others, it did not take long for me to see the limitations of this design. For instance, I've noticed all the parts I cut are trapezoidal.
If I cut around the outside of a shape, the cut looks like this -> /=\
And If I cut around the inside of a shape, the cut looks like this -> \=/
So now I'd like more input like alan's on how I can maximize rigidity and reduce flex.
Shorter uprights is at the top of the list. The z axis will be raised so it does not stick down below the Y axis (this was my original intention, but I drilled the holes for the bearings on the wrong end of the board...). This will let me shorten the uprights a few more inches as well.
I think the other thing holding me back is the table I've got the machine sitting on. It's one of those portable fold out tables you get at walmart and it's not very stable. I could use some ideas and pointers for that.
I'd also like to know if anyone has any tips on maybe a better/stiffer material to use than MDF that can be had for a reasonable price. JerryBurks' big bamboo is a pretty great inspiration, but I have no clue where to get Bamboo Plywood. Or, if you've got any tips on how to make MDF better, I'm all ears as well.