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// Module that attaches to Mendel's frame and holds PCBs
//
// GPL V3 Licenced, by Vik Olliver 2010-03-16
<mendel.inc>
<mendel.conf>
holder_length=96;
holder_width=96;
holder_height=12;
holder_foot_height=14; // Bit that rests on threaded rod.
frame_width=5;
crosspiece_width=m4_clearance_rad_v*4.5;
crosspiece_height=5;
module crosspiece(len) {
translate ([0,0,crosspiece_height/2]) difference () {
box(crosspiece_width,len,crosspiece_height);
// Assorted slotments
translate ([0,len*0.33,0]) box(m4_clearance_rad_v*2,len*0.17,crosspiece_height*2);
translate ([0,len*0.14,0]) box(m4_clearance_rad_v*2,len*0.14,crosspiece_height*2);
translate ([0,len*-0.33,0]) box(m4_clearance_rad_v*2,len*0.17,crosspiece_height*2);
translate ([0,len*-0.14,0]) box(m4_clearance_rad_v*2,len*0.14,crosspiece_height*2);
m8_hole_vert(crosspiece_height*2);
}
}
module y_bar_hole_cluster() {
translate ([y_bar_hole_spacing/2,-y_bar_hole_spacing/2,0]) m4_hole_vert(holder_height*4);
translate ([y_bar_hole_spacing/2,-y_bar_hole_spacing/-2,0]) m4_hole_vert(holder_height*4);
translate ([y_bar_hole_spacing/-2,-y_bar_hole_spacing/2,0]) m4_hole_vert(holder_height*4);
translate ([y_bar_hole_spacing/-2,-y_bar_hole_spacing/-2,0]) m4_hole_vert(holder_height*4);
m8_hole_vert(holder_height*4);
}
module side_hole_set() {
translate([holder_length/2,y_bar_hole_spacing,holder_height/2]) rotate ([0,-90,0]) m4_hole_horiz(20);
translate([holder_length/2-frame_width+3,-y_bar_hole_spacing,holder_height/2]) rotate ([180,-90,0]) m4_hole_horiz_with_hex(20);
translate([holder_length/2,y_bar_hole_spacing*3,holder_height/2]) rotate ([0,-90,0]) m4_hole_horiz(20);
translate([holder_length/2-frame_width+3,-y_bar_hole_spacing*3,holder_height/2]) rotate ([180,-90,0]) m4_hole_horiz_with_hex(20);
translate([holder_length/2-frame_width+3,-y_bar_hole_spacing*3,holder_height/2]) rotate ([180,-90,0]) m4_hole_horiz(70);
translate([holder_length/2-frame_width+3,y_bar_hole_spacing*3,holder_height/2]) rotate ([180,-90,0]) m4_hole_horiz(70);
}
module corner_lugs() {
translate([holder_length/2-frame_width-4,holder_length/2-y_bar_cube_width-3,holder_foot_height/2])
difference () {
cylinder(h=holder_foot_height,r=m4_clearance_rad_v*2,center=true);
m4_hole_vert(holder_foot_height*2);
}
}
module holder() {
difference () {
union () {
// Basic frame
translate ([0,0,holder_height/2]) difference () {
box(holder_length,holder_width,holder_height);
box(holder_length-2*frame_width,holder_width-2*frame_width,holder_height*2);
}
difference () {union () {
// Corner braces
translate([(holder_length-y_bar_cube_width)/2,(holder_width-y_bar_cube_width)/2,holder_foot_height/2])
box(y_bar_cube_width,y_bar_cube_width,holder_foot_height);
translate([(holder_length-y_bar_cube_width)/-2,(holder_width-y_bar_cube_width)/2,holder_foot_height/2])
box(y_bar_cube_width,y_bar_cube_width,holder_foot_height);
translate([(holder_length-y_bar_cube_width)/2,(holder_width-y_bar_cube_width)/-2,holder_foot_height/2])
box(y_bar_cube_width,y_bar_cube_width,holder_foot_height);
translate([(holder_length-y_bar_cube_width)/-2,(holder_width-y_bar_cube_width)/-2,holder_foot_height/2])
box(y_bar_cube_width,y_bar_cube_width,holder_foot_height);
}
// Clip inside corners off neatly.
rotate ([0,0,45]) scale ([0.78,0.78,2]) box(holder_length,holder_width,holder_height*1.2);
}
// Crosspieces
crosspiece(holder_length);
rotate ([0,0,90]) crosspiece(holder_width);
rotate ([0,0,45]) crosspiece(holder_width);
rotate ([0,0,-45]) crosspiece(holder_width);
// Corner lugs
rotate ([0,0,90]) corner_lugs();
rotate ([0,0,-90]) corner_lugs();
rotate ([0,0,180]) corner_lugs();
corner_lugs();
}
// Holes to be hacked out. Start with bar gripping holes
translate([(holder_length-y_bar_cube_width)/2,(holder_width-y_bar_cube_width)/2,0])
y_bar_hole_cluster();
translate([(holder_length-y_bar_cube_width)/-2,(holder_width-y_bar_cube_width)/2,0])
y_bar_hole_cluster();
translate([(holder_length-y_bar_cube_width)/2,(holder_width-y_bar_cube_width)/-2,0])
y_bar_hole_cluster();
translate([(holder_length-y_bar_cube_width)/-2,(holder_width-y_bar_cube_width)/-2,0])
y_bar_hole_cluster();
// Now side bolt holes
side_hole_set();
rotate ([0,0,90]) side_hole_set();
rotate ([0,0,180]) side_hole_set();
rotate ([0,0,-90]) side_hole_set();
// Space in case anyone wants to put a NEMA17 in it.
translate ([0,0,10+crosspiece_height-1]) cylinder(h=20,r=12,center=true);
}
}
holder();
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