benjaminhill
Posts: 7
Joined: Sat Nov 19, 2016 10:32 pm

Not getting support material in narrow section

I'm trying to print a badge holder. To do this, I've got a nice cutout groove inside a rectangle. I was able to get support material to show up inside the groove, but for some reason, it disappears within the loop at the top. Any idea why support material would stop short in that area? No matter how "dense" I make the support material, it stops under the loop.

Here is what the print preview is showing: https://goo.gl/photos/ow9K1NC1TQkiFT4L8

And to replicate, the OpenSCAD file.

Code: Select all

/*
Must be printed with support material.  
Best have support extend outwards so you can yank it out.
*/

$fn = 50;
// my badge dimensions
badge = [54, 87.31, 2.4];

module copy_mirror(vec = [0, 1, 0]) {
  children();
  mirror(vec) children();
}

union() {
    difference() {
        // Main structure
        union() {
            // Rounded edges for the main card holder
            minkowski() {
                cube([badge[0], badge[1], badge[2]-2], center = true);
                sphere(r = 2, center = true);
            };
            // Badge clip extension, 13mm wide
            color("green")
            translate([0, badge[1] / 2, 0])
            minkowski() {
                cube([17, 8, badge[2]-2], center = true);
                sphere(r = 2, center = true);
                //cylinder(r=2,h=1, center = true);
            }
        }
        
        // Bevel cutout replacing badge for angled edges
        color("red")
        cube(badge, center = true);

        // Viewing area cutout
        color("blue")
        cube([badge[0] - 5, badge[1] - 5, 20], center = true);
        
        // Badge loop cutout
        color("purple")
        translate([0, badge[1] / 2 + 1, 0])
        cube([13, 3, 20], center = true);

        // Top insert badge slot
        color("orange")
        translate([0, badge[1] / 2,0])
        cube([badge[0], 40, badge[2]-0.4], center = true);
    };
}
CompoundCarl
Posts: 2005
Joined: Wed Aug 05, 2015 7:23 am

Re: Not getting support material in narrow section

Can you post a factory file? That makes it easier to see your settings
benjaminhill
Posts: 7
Joined: Sat Nov 19, 2016 10:32 pm

Re: Not getting support material in narrow section

I didn't figure it out, but it got me to try the "manual" support additions feature, and @$%$%^ that is an amazingly easy to use feature! I feel like I got half my money worth right there, with the ease of placing support columns, and then that automatically translating to whatever support design and angle I told it to. Worked like a charm.

Factory file: https://drive.google.com/file/d/0ByXCDx ... sp=sharing
dorsai3d
Posts: 237
Joined: Mon Jan 11, 2016 9:01 am

Re: Not getting support material in narrow section

Just guessing on the preview (factory files are the most useful thing!) that you have the support pillar resolution too high. Reduce that or manually add in supports and you should be good.
CompoundCarl
Posts: 2005
Joined: Wed Aug 05, 2015 7:23 am

Re: Not getting support material in narrow section

Yup, looks like you're currently using a support pillar resolution of 4mm, which is too big for this model since it has many smaller features. So try reducing that to 1-2mm and it will work much better.

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