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dust_cap.scad
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dust_cap.scad
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// Dust cap system
lens_r=101/2;
use <28byj-48.scad>;
M3_d=3; // 2.5 is printed too narrow
M2_d=1.6*(3/2.5); // 1.6 enlarged in same proportions
M3_Head=2;
module ED80T()
{
cylinder(d=101,h=20,$fn=64);
cylinder(d=101-3*2,h=100,$fn=64);
}
module offset_hull(ofs=[0,0,0])
{
// Works with 1-level deep objects...
for(c=[0:$children-1])
hull()
{
translate(-ofs) children(c);
translate( ofs) children(c);
}
}
module screw_space(head_d,head_h,drill_d,drill_h,hull_ofs=[0,0,0])
{
offset_hull(hull_ofs)
{
cylinder(d=head_d,h=drill_h,$fn=12);
translate([0,0,drill_h-1])
cylinder(d=drill_d*2.0,h=head_h,$fn=12);
}
}
lever_l=30;
module cap_block(R,H,B) union()
{
bot_h=5;
lever_w=0+R*0.2;
lever_drop=0+H;
m_r=1;
difference()
{
translate([lever_l+R,0,-bot_h-lever_drop]) difference()
{
union()
{
cylinder(h=H+bot_h,d1=R*2+5,d2=R*2.1+5,$fn=64);
minkowski()
{
translate([-R-lever_l/2,0,10]) //hull()
{
cube([lever_l*1.8-m_r*2,lever_w-m_r*2,H-m_r*2],center=true);
//translate([0,0,-H/2+5/2])
// cube([lever_l,lever_w*1.5,5],center=true);
translate([-lever_l/2,0,H-5])
cube([lever_l*0.8-m_r*2,lever_w-m_r*2,H+10-m_r*2],center=true);
}
sphere(d=m_r*2);
}
}
// Cap emptiness
translate([0,0,bot_h+0.1]) union()
{
cylinder(h=2*H+0.1,d1=R*2,d2=R*2.2,$fn=64);
/*translate([0,0,H])
cylinder(h=H,d=R*2.1);*/
}
}
// Stepper axis
*rotate([0,180,0]) translate([0,24+M3_Head,-8])
rotate([90,0,0])
stepper_28BYJ_48();
#translate([0,lever_w/2+0,0])
rotate([90,0,0])
offset_hull([lever_l/8,0,0])
{
cylinder(d=6,h=1,$fn=16);
translate([0,0,lever_w/2])
cube([5,2,lever_w],center=true);
}
// Screws with space for head and adjustment
#union()
{
screw_space(M3_Head,4,M3_d,H/2+2,[lever_l/8,0,0]);
rotate([0,90,0]) screw_space(M3_Head,4,M3_d,lever_w+2);
rotate([0,-90,0]) screw_space(M3_Head,4,M3_d,lever_w+2);
}
}
}
module holder(R,H,B)
{
holder_w=0+R*0.1;
holder_h=70;
holder_d=45;
stepper_ear_h=0.8;
side_offset=5.5+holder_w/2+M3_Head+stepper_ear_h;
difference()
{
hull()
{
translate([0,side_offset,holder_w/2+10])
cube([holder_d,1+holder_w,holder_h],center=true);
/*translate([0,-side_offset,holder_w/2+10])
cube([holder_d,1+holder_w,holder_h],center=true);*/
translate([holder_d/2-holder_w,0,holder_w/2+10+holder_h/3])
cube([holder_w*6+5,1+holder_w+2*side_offset,holder_h/3],center=true);
}
%rotate([0,180,0])
translate([0,24+M3_Head,-8])
rotate([90,0,0])
stepper_28BYJ_48();
translate([0,0,8]) scale([1,5,1])
rotate([90,180,0]) scale(1.01) offset_hull([0,10,0])
{
// Stepper space
cylinder(h=holder_w+stepper_ear_h+1,d=28,center=true);
translate([-14.6/2,-17,-(holder_w+stepper_ear_h+1)/2])
cube([14.6,17,holder_w+stepper_ear_h+1]);
// Stepper screws
translate([-35/2,0,0])
cylinder(d=M3_d,h=holder_w+stepper_ear_h+1,center=true,$fn=12);
translate([+35/2,0,0])
cylinder(d=M3_d,h=holder_w+stepper_ear_h+1,center=true,$fn=12);
}
#translate([holder_d/2+holder_w*6/4-1,0,holder_w/2+10+holder_h/3])
rotate([90,0,0])
{
offset_hull([0,holder_h/9,0])
cylinder(d=2,h=holder_w*7,center=true,$fn=12);
translate([1/2,holder_h/9,0])
offset_hull([1/2,0,0])
cylinder(d=2,h=holder_w*7,center=true,$fn=12);
translate([1/2,-holder_h/9,0])
offset_hull([1/2,0,0])
cylinder(d=2,h=holder_w*7,center=true,$fn=12);
}
translate([lever_l+lens_r-1,0,-20])
ED80T();
translate([0,side_offset-holder_w/2-31/2,1])
{
cube([holder_d,30,holder_h],center=true);
translate([20,0,-5])
cube([holder_d,30,holder_h/2],center=true);
translate([holder_d,holder_w*2,-5])
cube([holder_d,30,holder_h/2],center=true);
}
// Argh, leave space for cap!
translate([0,0,-18+holder_d/2])
rotate([90,0,0])
difference()
{
cylinder(d=holder_d*1.6,h=(side_offset+holder_w)*2,center=true);
cylinder(d=holder_d*1.0,h=1+(side_offset+holder_w)*2,center=true);
translate([0,(1.6*holder_d)/4,0])
cube([holder_d*1.6,1.6*holder_d/2,1+(side_offset+holder_w)*2],center=true);
}
//cube([holder_d+5,30,holder_h/2],center=true);
}
}
%translate([lever_l+lens_r,0,-20]) ED80T();
holder(lens_r,20,50);
//rotate([0,180-180*sin(180*$t),0])
rotate([0,90,0])
cap_block(lens_r,20,50);