Talk:3D Printer Design Evolution

CNC torch table concept design comments

• Will axis sag in the middle?
  • If the traveling carriage is longer will it minimize rod bending?
  • does it need an I-beam and some sort of way to hang from the beam?
• protection for pulley belt

Spacer Idea

in order to insure equal spacing between the frame plates, perhaps a spacer could be placed near the bracket connections

can also be made to include a foot in order to lift the threads and nuts that face downward

foot_height = 0;
width = 12;
depth = 12;
platethickness = 3.6;
distance_from_corner = 5.1;
spacerthickness = 3;
radiusI = 3;
radiusO = 6;
$fn=20;

difference()
{
    union()
    {
cube([(spacerthickness+distance_from_corner+depth),(spacerthickness+distance_from_corner+depth),width]);
translate([radiusO+foot_height-spacerthickness,0,0])
        cylinder(r=foot_height-spacerthickness,width);

    }
translate([spacerthickness+distance_from_corner,spacerthickness,0])
cube([depth,platethickness,width+2]);
    
translate([spacerthickness,spacerthickness+distance_from_corner,0])
cube([platethickness,depth,width+2]);
    
translate([spacerthickness+platethickness+spacerthickness+radiusI,spacerthickness+platethickness+spacerthickness+radiusI,0])

minkowski()
{    
cube([(spacerthickness+distance_from_corner+depth),(spacerthickness+distance_from_corner+depth),width+2]); cylinder(r=radiusI,h=width);
}   

difference()
{
    cube([radiusO,radiusO,width+2]);
    translate([radiusO,radiusO,0])
    cylinder(r=radiusO,h=width+2);
}


    
}
echo("Thinnest point =",sqrt(pow((distance_from_corner-platethickness),2)+pow((distance_from_corner-platethickness),2)));