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Copy pathgregs-new-x-carriage.scad
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gregs-new-x-carriage.scad
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// Gregs PRUSA Mendel
// X-carriage
// Used for sliding on X axis
// GNU GPL v2
// Greg Frost
//https://github.com/GregFrost/PrusaMendel
include <gregs-lm8uu-holder.scad>
holder_separation=18;
fan_hole_separation=32; // check
fan_support_block=8;
fan_trap_width=3;
fan_support_thickness=8;
fan_diameter=33;
fan_hole_height=4;
belt_clamp_thickness=2;
belt_clamp_width=m3_diameter+3*belt_clamp_thickness+2;
belt_clamp_hole_separation=belt_width+4;
belt_clamp_height=m3_diameter+2*belt_clamp_thickness;
belt_clamp_length=belt_clamp_hole_separation+m3_diameter+2*belt_clamp_thickness;
key_w=4;
key_l=6;
key_d=2;
belt_allowance=1;
belt_clamp_channel_height=belt_thickness+tooth_height+belt_clamp_thickness*2;
echo ("belt_clamp_width+0.75",belt_clamp_width+0.75);
carriage_clamps_and_ram();
module carriage_clamps_and_ram()
{
rotate(45)
for (i=[-1,1])
translate([-5+((i==1)?0:-4),i*(belt_clamp_width/2+4),0])
belt_clamp(i);
translate([10,3,0])
rotate(-45)
belt_clamp_channel();
%cube([120,80,1],true);
gregs_x_carriage();
translate([0,17,0])
ram();
}
module gregs_x_carriage(with_fanmount=true)
{
difference()
{
union ()
{
if (with_fanmount)
translate([0,holder_separation/2+lm8uu_holder_length-fan_support_block,0])
translate([0,fan_support_block/2,0])
fan_mount();
for(i=[-1,1])
{
translate([50/2-lm8uu_holder_width/2,
i*(lm8uu_holder_length+holder_separation)/2-
lm8uu_holder_length/2,0])
render()
lm8uu_bearing_holder();
if(i==1)
{
translate([-50/2-lm8uu_holder_width/2,
-lm8uu_holder_length-holder_separation/2,0])
render()
lm8uu_bearing_holder();
}
}
linear_extrude(height=lm8uu_support_thickness)
translate([0,0,0])
{
barbell (
[25,holder_separation/2],
[25,-holder_separation/2],
lm8uu_holder_width/2,lm8uu_holder_width/2,12,12);
square([40,50],true);
translate([-25,-holder_separation/2])
circle(r=lm8uu_holder_width/2);
barbell (
[25-lm8uu_holder_width/2,
-holder_separation/2-lm8uu_holder_length+lm8uu_holder_width/2],
[-25+lm8uu_holder_width/2,
-holder_separation/2-lm8uu_holder_length+lm8uu_holder_width/2],
lm8uu_holder_width/2,lm8uu_holder_width/2,12,12);
}
translate([25+lm8uu_holder_width/2+carriage_belt_spacing+belt_width/2,(lm8uu_holder_length*0.7+holder_separation/2)])
belt_clamp_socket (version=1);
mirror([0,1,0])
translate([25+lm8uu_holder_width/2+carriage_belt_spacing+belt_width/2,(lm8uu_holder_length*0.7+holder_separation/2)])
belt_clamp_socket (version=0);
// Thicker bit around the big hole.
difference()
{
rotate(45)
assign(ehole=cos(45)*(50+lm8uu_holder_width+cos(45)*10),
ehole_r=10,ehole_t=lm8uu_support_thickness*1.7)
translate([0,0,ehole_t/2])
{
cube([ehole-2*ehole_r,ehole,ehole_t],center=true);
cube([ehole,ehole-2*ehole_r,ehole_t],center=true);
for(i=[-1,1])
for(j=[-1,1])
translate([i*(ehole/2-ehole_r),j*(ehole/2-ehole_r),0])
cylinder(r=ehole_r,h=ehole_t,center=true);
}
for(i=[-1,1])
for(j=[-1,1])
if (!((i==-1) &&(j==1)))
translate([23*i,18*j,(lm8uu_support_thickness*1.7+2)/2])
cube([15,15,lm8uu_support_thickness*1.7+2],center=true);
}
}
translate([25+lm8uu_holder_width/2+carriage_belt_spacing+belt_width/2,(lm8uu_holder_length*0.7+holder_separation/2)])
belt_clamp_holes(1);
mirror([0,1,0])
translate([25+lm8uu_holder_width/2+carriage_belt_spacing+belt_width/2,(lm8uu_holder_length*0.7+holder_separation/2)])
belt_clamp_holes(0);
// The big hole.
rotate(45)
translate([0,0,lm8uu_holder_height/2])
assign(ehole=35,ehole_r=2)
{
cube([ehole-2*ehole_r,ehole,lm8uu_holder_height+2],center=true);
cube([ehole,ehole-2*ehole_r,lm8uu_holder_height+2],center=true);
for(i=[-1,1])
for(j=[-1,1])
translate([i*(ehole/2-ehole_r),j*(ehole/2-ehole_r),0])
cylinder(r=ehole_r,h=lm8uu_holder_height+2,center=true,$fn=16);
}
// The extruder mounting holes.
for (i=[0:1])
rotate(180*i)
rotate(22)
translate([0,25,-1])
cylinder(r=m4_diameter/2,h=lm8uu_support_thickness*2+2,$fs=1);
translate([0,holder_separation/2+lm8uu_holder_length-fan_support_block,0])
translate([0,fan_support_block/2,0])
fan_mount_holes();
cable_tie_holes();
for(i=[-1,1])
translate([38,i*18.4,-1])
cube([10,5,15],true);
}
//belt path
translate([25+lm8uu_holder_width/2+carriage_belt_spacing+belt_width/2,0,-belt_thickness/2])
%cube([belt_width,200,belt_thickness],center=true);
}
module cable_tie_holes ()
{
// Cable tie holes.
for (i=[-1,1])
translate([25-lm8uu_holder_width/2+1,(holder_separation/2+lm8uu_holder_length*0.7)*i,5])
rotate([0,-30,0])
{
cube([2,4,20],center=true);
translate([0,-lm8uu_holder_length*0.4*i,0])
cube([2,4,20],center=true);
}
translate([-25+lm8uu_holder_width/2-1,-(holder_separation/2+lm8uu_holder_length*0.7),5])
rotate([0,30,0])
{
cube([2,4,20],center=true);
translate([0,lm8uu_holder_length*0.4,0])
cube([2,4,20],center=true);
}
}
module belt_clamp_socket(version=0)
{
difference()
{
translate([0,0,belt_clamp_height/2])
union()
{
translate([-(2.5+carriage_belt_spacing+belt_width/2),-belt_clamp_width/2,-belt_clamp_height/2])
cube([2.5+carriage_belt_spacing+belt_width/2+belt_clamp_hole_separation/2,belt_clamp_width,belt_clamp_height]);
for(i=[-1,1])
translate([belt_clamp_hole_separation/2,0,0])
cylinder(r=belt_clamp_width/2,h=belt_clamp_height,center=true);
if (version==1)
translate([belt_clamp_hole_separation/2,0,0])
{
difference()
{
translate([0,0,belt_thickness/2])
cylinder(r=belt_clamp_width/2,h=belt_clamp_height+belt_thickness,center=true);
translate([-belt_clamp_width/2,-belt_clamp_width/2-1,-belt_clamp_height/2-1])
cube([belt_clamp_width/2+2,belt_clamp_width+2,belt_clamp_height+belt_thickness+2]);
}
}
}
}
}
module belt_clamp_channel()
{
difference()
{
translate([0,0,belt_clamp_channel_height/2])
union()
{
cube([belt_clamp_hole_separation,
belt_clamp_width,belt_clamp_channel_height],center=true);
for(i=[-1,1])
translate([i*belt_clamp_hole_separation/2,0,0])
cylinder(r=belt_clamp_width/2,h=belt_clamp_channel_height,center=true);
translate([-belt_clamp_hole_separation/2,0,
(belt_clamp_channel_height+key_d)/2-belt_clamp_channel_height/2])
cube([key_w-0.5,key_l-0.5,belt_clamp_channel_height+key_d],true);
}
translate([belt_clamp_hole_separation/2,0,-1])
rotate(360/16)
cylinder(r=m3_diameter/2,h=belt_clamp_channel_height+2,$fn=8);
translate([-belt_width/2,-belt_clamp_width/2-1,
belt_clamp_channel_height-belt_thickness-tooth_height])
cube([belt_width,belt_clamp_width+2,belt_thickness+tooth_height+1]);
}
}
module belt_clamp_holes(version)
{
translate([0,0,belt_clamp_height/2])
{
translate([belt_clamp_hole_separation/2,0,0])
cylinder(r=m3_diameter/2,h=belt_clamp_height+2,center=true,$fn=8);
translate([-belt_clamp_hole_separation/2,0,3/2-1-belt_clamp_height/2])
cube([key_w,key_l,3],center=true);
if(version==1)
{
rotate([90,0,0])
rotate(360/16)
cylinder(r=m3_diameter/2 ,h=belt_clamp_width+2,
center=true,$fn=8);
rotate([90,0,0])
translate([0,0,belt_clamp_width/2])
cylinder(r=m3_nut_diameter/2,h=3.4,center=true,$fn=6);
for(i=[-3:3])
translate([-belt_width/2,-tooth_spacing/4+i*tooth_spacing,
belt_clamp_height-tooth_height-belt_clamp_height/2])
cube([belt_width,tooth_spacing/2,tooth_height+1]);
}
else
{
translate([belt_clamp_hole_separation/2,0,
belt_clamp_height-belt_clamp_height/2-2])
cylinder(r=m3_nut_diameter/2,h=3,$fn=6);
}
}
}
belt_clamp_clamp_height=tooth_height+belt_clamp_thickness*2;
module belt_clamp(version)
{
difference()
{
translate([0,0,belt_clamp_clamp_height/2])
union()
{
# cube([belt_clamp_hole_separation,belt_clamp_width,
belt_clamp_clamp_height],center=true);
for(i=[-1,1])
translate([i*belt_clamp_hole_separation/2,0,0])
cylinder(r=belt_clamp_width/2,h=belt_clamp_clamp_height,center=true);
if (version==1)
translate([-belt_clamp_hole_separation/2,0,
(belt_clamp_clamp_height+key_d+belt_allowance)/2-
belt_clamp_clamp_height/2])
cube([key_w-0.5,key_l-0.5,belt_clamp_clamp_height+key_d+belt_allowance],
true);
if(version==1)
translate([belt_clamp_hole_separation/2,0,-belt_clamp_clamp_height/2])
difference()
{
cylinder(r=belt_clamp_width/2,h=belt_clamp_clamp_height+belt_thickness);
translate([-belt_clamp_width-1,-belt_clamp_width/2-1,-1])
cube([belt_clamp_width+2,belt_clamp_width+2,belt_clamp_clamp_height+belt_thickness+2]);
}
}
translate([belt_clamp_hole_separation/2,0,-1])
rotate(360/16)
cylinder(r=m3_diameter/2,h=belt_clamp_clamp_height+belt_thickness+2,$fn=8);
if(version==1)
{
for(i=[-3:3])
translate([-belt_width/2,-tooth_spacing/4+i*tooth_spacing,
belt_clamp_clamp_height-tooth_height])
cube([belt_width,tooth_spacing/2,tooth_height+1]);
}
else
{
translate([-belt_clamp_width-belt_width/2-0.5,lm8uu_holder_gap/2-0.25,-1])
cube([belt_clamp_width,belt_clamp_width,belt_clamp_clamp_height+2]);
translate([-belt_clamp_width-belt_width/2-0.5,
-lm8uu_holder_gap/2+0.25-belt_clamp_width,-1])
cube([belt_clamp_width,belt_clamp_width,belt_clamp_clamp_height+2]);
translate([-belt_clamp_width-belt_width/2-0.5-3.5,-belt_clamp_width/2,-1])
cube([belt_clamp_width,belt_clamp_width,belt_clamp_clamp_height+2]);
translate([belt_clamp_hole_separation/2,0,belt_clamp_clamp_height-2])
cylinder(r=m3_nut_diameter/2,h=3,$fn=6);
}
}
}
module barbell (x1,x2,r1,r2,r3,r4)
{
x3=triangulate (x1,x2,r1+r3,r2+r3);
x4=triangulate (x2,x1,r2+r4,r1+r4);
render()
difference ()
{
union()
{
translate(x1)
circle (r=r1);
translate(x2)
circle(r=r2);
polygon (points=[x1,x3,x2,x4]);
}
translate(x3)
circle(r=r3,$fa=5);
translate(x4)
circle(r=r4,$fa=5);
}
}
module fan_mount()
{
difference()
{
union ()
{
translate([0,0,fan_support_block/4])
# cube([fan_hole_separation+fan_support_block,fan_support_thickness,
fan_support_block/2],center=true);
for (i=[-1,1])
translate([i*fan_hole_separation/2,0,fan_support_block/2])
rotate([90,0,0])
cylinder(r=fan_support_block/2,h=fan_support_block,center=true,$fn=20);
translate([0,0,fan_support_block/2])
cube([fan_hole_separation,fan_support_thickness,fan_support_block],
center=true);
translate([0,-6,lm8uu_support_thickness/2])
cube([fan_hole_separation+fan_support_block,fan_support_thickness+12,
lm8uu_support_thickness],center=true);
}
translate([fan_support_block/2+25+1-lm8uu_holder_width/2,0,fan_support_block/2])
cube([fan_support_block,fan_support_block+2,fan_support_block+2],true);
fan_mount_holes();
}
}
module fan_mount_holes()
{
for(i=[-1,1])
{
translate([i*fan_hole_separation/2,0,fan_hole_height])
{
rotate([90,0,0])
rotate(180/8)
cylinder(r=m3_diameter/2,h=fan_support_thickness+2,
center=true,$fn=8);
translate([0,0,0])
rotate([90,0,0])
rotate([0,0,180/6])
cylinder(r=(m3_nut_diameter-0.5)/2,h=fan_trap_width,
center=true,$fn=6);
translate([0,0,-(fan_hole_height+1)/2])
cube([(m3_nut_diameter-0.5)*cos(30),fan_trap_width,
fan_hole_height+1],center=true);
translate([0,0,-fan_hole_height])
cube([(m3_nut_diameter-0.5)*cos(30)+1,fan_trap_width+1,
0.8],center=true);
}
}
render()
intersection()
{
translate([0,0,fan_hole_separation/2+fan_hole_height])
rotate([-90,0,0])
cylinder(r=fan_diameter/2,h=fan_support_thickness+2,center=true);
color([1,0,0])
translate([0,0,fan_support_block/2])
cube([fan_hole_separation+fan_support_block+2,fan_support_thickness+2,
fan_support_block+2],center=true);
}
}
function triangulate (point1, point2, length1, length2) =
point1 +
length1*rotated(
atan2(point2[1]-point1[1],point2[0]-point1[0])+
angle(distance(point1,point2),length1,length2));
function distance(point1,point2)=
sqrt((point1[0]-point2[0])*(point1[0]-point2[0])+
(point1[1]-point2[1])*(point1[1]-point2[1]));
function angle(a,b,c) = acos((a*a+b*b-c*c)/(2*a*b));
function rotated(a)=[cos(a),sin(a),0];
ram_height=belt_width;
ram_length=1.5;
ram_lip=0.5;
module ram()
{
ram_radius=(belt_clamp_height-tooth_height)/2;
difference()
{
union()
{
cylinder(r1=ram_radius+ram_lip,r2=ram_radius-ram_lip,h=2*ram_lip,$fn=32);
translate([0,0,ram_height])
cylinder(r1=ram_radius-ram_lip,r2=ram_radius+ram_lip,h=2*ram_lip,$fn=32);
translate([0,0,ram_lip])
cylinder(r=ram_radius,h=ram_height,$fn=32);
translate([0,-m3_nut_diameter/2,0])
cube([ram_length+0.1,m3_nut_diameter,ram_height+2*ram_lip]);
}
translate([ram_length,-(ram_radius+ram_lip+1),-1])
cube([ram_radius*2+2*ram_lip+2,ram_radius*2+2*ram_lip+2,ram_height+2+2*ram_lip]);
translate([-0.5,0,ram_height/2+ram_lip])
rotate([0,90,0])
rotate([0,0,180/8])
cylinder(r=m3_diameter/2,h=2+ram_length,$fn=8);
}
}