Im new, am a 3D designer. Need a New cnc machine and need advice and guidance

[FlyHighRC]

there is one support under the table though I could easily add another :) The table is above the rails to give more rigidity which ill show from the underneath. The, so bare in mind that its not at all done..still fiddling with the design. I see your point about crap going onto the rails but that would happen in most machines...yours even...rather than have the stuff been blown onto them after running alone your board mine will do the same but the machines rubbish will blow off the board and possibly land on the rails...but either way..Im going to add 3mm poly between the gap of the table and the rail carrages...so efficiently having a box where the machined rubbish(Any jargon here) will stay and be easily cleaned up afterwards :)

Ahh, I was planning on ussing a single ballscrew down the middle? Is that a big no no?

Also, the rails that the gantry run on...is there a good distance to keep them from eachother? Assuming that the closer they are the more slop you could possibly get?

My gantrry is 1 vertical piece with a large 40x40x4, 45deg support