so i had to sell my old cnc router as im moving :S
but once ive settled down again i would like to build something again
i have an old cast bed 900x900x120mm weighing in at around 400kgs ....
ideally it would be nice to have a fixed gantry, but i dont have the space for it ... so its going to have to be a moving gantry
my idea is to have something like in the picture ... i would like to maximize the 900 width , so therefore the rails extend onto the gantry risers allowing the z carriage to have maximum travel
i have seen a couple ground ballscrews, 25mm c5's with a 6mm pitch .. going to have two of them to move the gantry on a twin 400 watt servo (still to do the math ) can see im gonna need the 750w
again would like to go direct drive onto the servo to avoid belts and pulleys