Overhead filament spool holder: https://www.thingiverse.com/thing:1424791.
I used the attached OpenSCAD file to print various sized spool adapters.
After using the above for a couple of years, I recently switched to https://www.amazon.com/Befenybay-Filament-Concentric-Printing-Material/dp/B08TM8N77D because my collection of spool adapters were beginning to “wear out”.
// 'Customizable Spool Adapter' by wstein
// is licensed under the Attribution - Non-Commercial - Share Alike license.
// Version 1.3.1 (c) November 2015
// please refer the complete license here: http://creativecommons.org/licenses/by-sa/3.0/legalcode
//
// V1.4: inner hole fix (see http://www.thingiverse.com/thing:1151473)
// V1.3.1: Bug fixed for latest customizer
// V1.3: Customizer creation failure fixed. Some smaller issues fixed. More slider used. New license cc-by-sa!
// V1.2: part handling optimized
// V1.1a: UI optimized
// V1.1: new star shape
// preview[view:south, tilt:top diagonal]
//to show. This setting is only relevant for preview.
part="right"; //[right:Right,left:Left,straight:Straight,star_right:Star Right,star_left:Star Left]
//depended on the inner and outer diameter, you may also need to change the "Arms" settings to get a perfect working adapter.
tube_diameter=32; //[0:0.5:75]
spool_diameter=53; //[0:1:150]
height=15; //[0:100]
number_of_arms=5; //[3:10]
function get_number_of_arms() = (part == "straight" && number_of_arms % 2 > 0 ? 1 : 0) + number_of_arms;
/*[Advanced]*/
inner_diameter_backlash=1.0; //[0:0.1:5]
collar_thickness=2.0; //[0:0.5:10]
chamfer_depth=2.0; //[0:0.5:20]
wall=3.0; //[0:0.1:10]
/*[Arms]*/
//I used 2mm on 32/53 Adapter with 6 arms and 2.4mm with 5 arms. It depends on the length.
arm_thickness=2.4; //[0:0.1:5]
//in mm. The adapter should fit tight to the spool, so the outer diameter is enlarged by this value.
arm_compression=1.0; //[0:0.1:5]
// in mm
arm_end_diameter=5.0; //[0:0.5:20]
/*[Expert]*/
quality=80; //[60:Normal,80:Good,100:High]
function get_part_index() = search([part], ["right","left","straight","star_right","star_left"])[0];
/*[Hidden]*/
inner_diameter=tube_diameter+inner_diameter_backlash;
outer_diameter=spool_diameter+arm_compression;
outer_shape=[
[outer_diameter/2+arm_end_diameter+.1,collar_thickness],
[outer_diameter/2,collar_thickness],
[outer_diameter/2,height-chamfer_depth],
[spool_diameter/2-.5,height+0.01],
[outer_diameter/2+arm_end_diameter+.1,height+0.01],
];
number=part == "straight"?get_number_of_arms()/2:get_number_of_arms();
arm_degree=360/get_number_of_arms();
degree=360/number;
difference()
{
linear_extrude(convexity=20,height=height)
union()
{
if(get_part_index()>2)
for(a=[0:degree:359])
hull()
{
circle(r=inner_diameter/2+wall,$fn=quality);
rotate([0,0,a])
translate([cos_arm,0,0])
circle(r=arm_thickness/2,$fn=arm_thickness*7);
}
else
hull()
{
circle(r=inner_diameter/2+wall,$fn=quality);
for(a=[0:degree:359])
rotate([0,0,a])
translate([cos_arm,0,0])
circle(r=arm_thickness/2,$fn=arm_thickness*7);
}
for(a=[0:degree:359])
rotate([0,0,a])
for(i=[0:len(arm_paths[get_part_index()])-2])
hull()
for(j=[i:i+1])
translate(arm_paths[get_part_index()][j])
circle(r=arm_thickness/2,$fn=arm_thickness*7);
for(a=[0:360/get_number_of_arms():359])
rotate([0,0,a])
translate([cos_arm,sin_arm])
circle(r=arm_end_diameter/2,$fn=arm_end_diameter*7);
}
translate([0,0,-1])
cylinder(r=inner_diameter/2, h=height+2, $fn=quality);
rotate_extrude(convexity=20,$fn=quality)
polygon(outer_shape);
}
sin_arm=sin(arm_degree/2)*outer_diameter/2;
cos_arm=cos(arm_degree/2)*outer_diameter/2;
arm_paths=[
// right
[
[cos_arm,0],
[cos_arm,sin_arm],
],
// left
[
[cos_arm,0],
[cos_arm,-sin_arm],
],
// straight
[
[cos_arm,sin_arm],
[cos_arm,-sin_arm],
],
// right star
[
[cos_arm,0],
[cos_arm,sin_arm],
],
// left star
[
[cos_arm,0],
[cos_arm,-sin_arm],
],
];
