Added Wiki submodule. Parts tweaks.

.gitmodules

@@ -0,0 +1,3 @@
+[submodule "wiki"]
+	path = wiki
+	url = https://github.com/revarbat/snappy-reprap.wiki.git

GDMUtils.scad

@@ -552,18 +552,34 @@ module narrowing_strut(w=10, l=100, wall=5, ang=30)
 //!narrowing_strut();
 
 
+
 // Makes a wall which thins to a smaller width in the center,
 // with angled supports to prevent critical overhangs.
 // Example:
 //   thinning_wall(h=50, l=100, thick=4, ang=30, strut=5, wall=2);
-module thinning_wall(h=50, l=100, thick=4, ang=30, strut=5, wall=2)
+module thinning_wall(h=50, l=100, thick=5, ang=30, strut=5, wall=3, bracing=true)
 {
+	ang = atan((h-2*strut)/(l-2*strut));
+	dlen = (h-2*strut)/sin(ang);
 	union() {
 		xrot_copies([0, 180]) {
 			translate([0, 0, -h/2])
 				narrowing_strut(w=thick, l=l, wall=strut, ang=ang);
 			translate([0, -l/2, 0])
 				xrot(-90) narrowing_strut(w=thick, l=h, wall=strut, ang=ang);
+			if (bracing == true) {
+				intersection() {
+					cube(size=[thick, l, h], center=true);
+					xrot_copies([-ang,ang]) {
+						grid_of(za=[-strut/4, strut/4]) {
+							scale([1,1,1.5]) yrot(45) {
+								cube(size=[thick/sqrt(2), dlen, thick/sqrt(2)], center=true);
+							}
+						}
+						cube(size=[thick, dlen, strut/2], center=true);
+					}
+				}
+			}
 		}
 		cube(size=[wall, l-1, h-1], center=true);
 	}
@@ -571,6 +587,7 @@ module thinning_wall(h=50, l=100, thick=4, ang=30, strut=5, wall=2)
 //!thinning_wall();
 
 
+
 // Example:
 //   sparse_strut(h=40, l=120, thick=4, maxang=30, strut=5, max_bridge=20);
 module sparse_strut(h=50, l=100, thick=4, maxang=30, strut=5, max_bridge = 20)
@@ -823,7 +840,7 @@ module nema17_mount_holes(depth=5, len=5)
 			cylinder(h=depth, r=plinth_diam/2, center=true);
 	}
 }
-!nema17_mount_holes(depth=5, len=5);
+//!nema17_mount_holes(depth=5, len=5);
 
 
 

README.md

@@ -2,3 +2,90 @@ snappy-reprap
 =============
 
 A parametric design for a cheap self-replicating 3D printer (reprap) that snaps together to minimize screws and non-printed parts.
+![Snappy Full Rendering](https://github.com/revarbat/snappy-reprap/wiki/snappy_small.png)
+
+Building the STL files
+----------------------
+
+The Makefile currently defines $OPENSCAD for building on OS X:
+```
+OPENSCAD=/Applications/OpenSCAD.app/Contents/MacOS/OpenSCAD
+```
+
+Under Linux, you can change that to:
+```
+OPENSCAD=openscad
+```
+
+Under Windows, you'll probably have to open each ```*_part.scad``` and ```*_parts.scad``` file individually and manually export the STL files.
+
+
+Printing the parts
+------------------
+You will need to print out the following parts:
+
+|Count| Part File
+|-----|----------------------
+|   1 | cap\_parts.stl
+|   1 | drive\_gear\_parts.stl
+|   1 | motor\_mount\_plate\_parts.stl
+|   2 | rail\_with\_motor\_mount\_part.stl
+|   1 | rails\_90deg\_joint\_part.stl
+|   2 | rails\_end\_part.stl
+|   7 | rails\_part.stl
+|   1 | roller\_parts.stl
+|   3 | sled\_end\_parts.stl
+|   2 | support\_leg\_part.stl
+|   2 | xy\_joiner\_parts.stl
+|   4 | xy\_sled\_part.stl
+|   1 | z\_platform\_joint\_part.stl
+|   1 | z\_sled\_part.stl
+
+
+Required Vitamins
+-----------------
+You'll need the following un-printable parts:
+
+|Count| Description
+|-----|----------------------------------------------------
+|   1 | RAMBo controller electronics.
+|   1 | 60 Watt 12v Power Supply
+|   3 | End-stop micro-switches and wiring.
+|   3 | NEMA17 Stepper Motors, Less than 35mm length
+|   1 | NEMA17 Stepper Motor, High Torque.
+|   1 | Wiring for Extruder Heater.
+|   1 | Wiring for Extruder Thermistor.
+|   1 | J-Head Extruder.
+|   1 | Threaded rod, 300mm x 8mm.
+|   1 | Nut, 8mm.
+|   2 | M3x15 Socket Screws. 
+|  18 | M3x10 Socket Screws.
+|   4 | M3 Nuts.
+|  16 | M3 Washers.
+|   6 | M2x15 Socket Screws.
+|   6 | M2 Nuts.
+|   1 | Spring.  _(**TODO:** determine size)_
+|   2 | M3x20? socket screws. _(**TODO:** determine actual size)_
+|   2 | M3x20? countersunk screws. _(**TODO:** determine actual size)_
+|   1 | Extruder Drive Gear.
+|   1 | M2 Extruder drive gear set screw.
+| 2Kg | Plastic Filament. _(**TODO:** determine actual amount.)_
+
+
+Required Tools
+--------------
+You will need the following tools to assemble this printer.
+
+- 3mm hex wrench.
+- 2mm hex wrench.
+- Small flathead screwdriver.
+- Small phillips screwdriver.
+- Medium-Grit Sandpaper.
+- Possibly cyanoacrylate glue. (super-glue)
+
+
+Assembly instructions
+---------------------
+TBD
+
+

TODO.md

@@ -1,12 +1,14 @@
 TODO:
 -----
 * Z-axis platform threaded screw nut holder.
-* Z-axis motor mount in 90deg corner part.
 * Y-axis cable chain.
 * Z-axis cable chain.
 * X-axis endstop.
-* Y-axis endstop.
-* Z-axis endstop.
+* Z threaded rod shaft coupler.
+* Extruder mount.
+* Extruder base for J-head.
+* Minimalist Mk7-esque Extruder Parts.
 * Electronics container.
-* Extruder mount part.
+* Motherboard mounts.
+
 

config.scad

@@ -6,7 +6,7 @@ rack_tooth_size =   5;  // mm per tooth.
 
 rail_length  = 150;
 rail_height  =  50;
-rail_thick   =   5;
+rail_thick   =   7;
 
 motor_rail_length = 100;
 

joiners.scad

@@ -99,23 +99,23 @@ module lock_tab(h=30, wall=3, slop=0.0)
 
 
 
-module lock_slot(h=30, wall=3, slop=0.2)
+module lock_slot(h=30, wall=3, backing=0, slop=0.2)
 {
 	s1 = 2*wall+slop/2;
 	s2 = wall+slop/2;
 	w = 2*s1+2*wall;
 	d = wall*3+slop;
 	ang = atan(((s1-s2)/2)/(h-2));
-	translate([0, d/2, 0]) difference() {
+	translate([0, (d+backing)/2, 0]) difference() {
 		intersection() {
-			yrot( ang) translate([0, 0, (h+5)/2]) cube(size=[w, d, h+10], center=true);
-			yrot(-ang) translate([0, 0, (h+5)/2]) cube(size=[w, d, h+10], center=true);
-			translate([0, 0, h/2]) cube(size=[w, d, h], center=true);
+			yrot( ang) translate([0, 0, (h+5)/2]) cube(size=[w, d+backing, h+10], center=true);
+			yrot(-ang) translate([0, 0, (h+5)/2]) cube(size=[w, d+backing, h+10], center=true);
+			translate([0, 0, h/2]) cube(size=[w, d+backing, h], center=true);
 		}
-		translate([0, d/2+0.05, -0.05]) lock_tab(h=h, wall=wall, slop=-slop);
+		translate([0, (d+backing)/2+0.05, -0.05]) lock_tab(h=h, wall=wall, slop=-slop);
 	}
 }
-//lock_slot(h=30, wall=2, slop=0.1);
+//!lock_slot(h=30, wall=2, slop=0.1);
 
 
 

rails_90deg_joint_part.scad

@@ -6,6 +6,8 @@ use <joiners.scad>
 module rails_90deg_joint()
 {
 	joiner_length=10;
+	base_height = rail_height+roller_thick;
+	endstop_delta = platform_length - base_height;
 
 	difference() {
 		union() {
@@ -15,9 +17,14 @@ module rails_90deg_joint()
 					translate([0,platform_length/2,rail_thick/2]) yrot(90)
 						sparse_strut(h=rail_width, l=platform_length, thick=rail_thick, maxang=45, strut=10, max_bridge=500);
 
-					// Back.
-					translate([0,rail_thick/2,platform_length/2]) zrot(90) {
-						thinning_wall(h=platform_length, l=rail_width, thick=rail_thick, strut=5);
+					// Lower Back.
+					translate([0,rail_thick/2,rail_height/2]) zrot(90) {
+						thinning_wall(h=rail_height, l=rail_width-joiner_width, thick=rail_thick, strut=rail_thick);
+					}
+
+					// Upper Back.
+					translate([0, rail_thick/2, rail_height+(platform_length-rail_height-rail_thick)/2]) zrot(90) {
+						thinning_wall(h=platform_length-rail_height+rail_thick, l=rail_width-joiner_width, thick=rail_thick, strut=rail_thick);
 					}
 
 					// Side Walls
@@ -27,7 +34,7 @@ module rails_90deg_joint()
 							ya=[rail_height/2],
 							za=[(platform_length-rail_height-joiner_length)/2+rail_height]
 						) {
-							thinning_wall(h=platform_length-joiner_length-rail_height+2*rail_thick, l=rail_height, thick=joiner_width, strut=rail_thick);
+							thinning_wall(h=platform_length-joiner_length-rail_height+2*rail_thick, l=rail_height, thick=joiner_width, strut=rail_thick, bracing=false);
 						}
 
 						// Lower Walls.
@@ -35,7 +42,7 @@ module rails_90deg_joint()
 							ya=[(platform_length-rail_height-joiner_length)/2+rail_height],
 							za=[rail_height/2]
 						) {
-							thinning_wall(l=platform_length-joiner_length-rail_height+2*rail_thick, h=rail_height, thick=joiner_width, strut=rail_thick);
+							thinning_wall(l=platform_length-joiner_length-rail_height+2*rail_thick, h=rail_height, thick=joiner_width, strut=rail_thick, bracing=false);
 						}
 
 						// Corner Walls.
@@ -43,7 +50,7 @@ module rails_90deg_joint()
 							ya=[rail_height/2],
 							za=[rail_height/2]
 						) {
-							thinning_wall(l=rail_height, h=rail_height, thick=joiner_width, strut=rail_thick);
+							thinning_wall(l=rail_height, h=rail_height, thick=joiner_width, strut=rail_thick, bracing=false);
 						}
 
 						// Rail tops.
@@ -95,12 +102,48 @@ module rails_90deg_joint()
 				}
 			}
 
+			// Motor clip mounts.
+			translate([0, rail_height+roller_thick/2-1, 0]) {
+				zrot_copies([90, 270]) {
+					translate([(43+joiner_width+10)/2, 0, 30]) {
+						xrot(90) {
+							joiner(h=rail_height, w=joiner_width, l=30, a=joiner_angle);
+							translate([0, -30+rail_thick/2, 0])
+								cube(size=[joiner_width, rail_thick, rail_width-joiner_width], center=true);
+						}
+					}
+				}
+			}
+
 			// Side mount slots.
 			translate([0, platform_width/3, 0]) {
 				grid_of(ya=[-platform_width/3/2, platform_width/3/2]) {
 					zrot_copies([0,180]) {
-						translate([rail_width/2-2.5, 0, 0]) {
-							zrot(-90) lock_slot(h=25, wall=3);
+						translate([rail_width/2-joiner_width/2, 0, 0]) {
+							zrot(-90) lock_slot(h=25, wall=3, backing=joiner_width/2-2);
+						}
+					}
+				}
+			}
+
+			// Y-axis endstop switch mount
+			translate([-(rail_width-4)/2, endstop_delta/2+base_height-0.05, endstop_delta/2+base_height-0.05]) {
+				difference() {
+					cube(size=[4, endstop_delta+0.05, endstop_delta+0.05], center=true);
+					translate([0, endstop_delta/2, endstop_delta/2]) xrot(45)
+						cube(size=15, center=true);
+					translate([0, endstop_delta/2-5, -endstop_delta/2+15]) {
+						grid_of(za=[-5, 5]) {
+							yrot(90) {
+								cylinder(h=10, r=2.5/2, center=true, $fn=12);
+							}
+						}
+					}
+					translate([0, -(endstop_delta/2-15), (endstop_delta/2-5)]) {
+						grid_of(ya=[-5, 5]) {
+							yrot(90) {
+								cylinder(h=10, r=2.5/2, center=true, $fn=12);
+							}
 						}
 					}
 				}
@@ -108,7 +151,7 @@ module rails_90deg_joint()
 		}
 	}
 }
-//!rails_90deg_joint();
+rails_90deg_joint();
 
 
 

rails_end_part.scad

@@ -17,7 +17,7 @@ module rails_end()
 
 					// Back.
 					translate([0, -joiner_length-rail_thick/2+0.05, base_height/2]) zrot(90)
-						thinning_wall(h=base_height, l=rail_width, thick=rail_thick, strut=5);
+						thinning_wall(h=base_height, l=rail_width, thick=rail_thick, strut=joiner_width);
 				}
 
 				// Clear space out near front clips.