Tensioning X axis idler

diff --git a/box_frame/inc/metric.scad b/box_frame/inc/metric.scad
index 82a23a4..d63e4fb 100644 (file)
--- a/box_frame/inc/metric.scad
+++ b/box_frame/inc/metric.scad
@@ -21,10 +21,11 @@ m8_nut_diameter = 14.1;
 
 m4_diameter = 4.5;
 m4_nut_diameter = 9;
+m4_nut_diameter_horizontal = 10;
 
 m3_diameter = 3.6;
 m3_nut_diameter = 5.3;
-m3_nut_diameter_horizontal = 6.1;
+m3_nut_diameter_horizontal = 6.8;
 m3_washer_diameter = 6.9;
 
 // Motors

diff --git a/box_frame/x-end.scad b/box_frame/x-end.scad
index 87605c7..e8f98d2 100644 (file)
--- a/box_frame/x-end.scad
+++ b/box_frame/x-end.scad
@@ -9,6 +9,7 @@
 include <configuration.scad>
 use <bushing.scad>
 use <inc/bearing-guide.scad>
+use <y-drivetrain.scad>
 
 //height and width of the x blocks depend on x smooth rod radius
 x_box_height = 52 + 2 * bushing_xy[0];
@@ -23,21 +24,25 @@ module x_end_motor(){
 
         translate([0, -z_delta - 2, 0]) difference(){
             union(){
-                translate([-13.75, -14 + z_delta / 2, 30]) cube_fillet([17.5, 14 + z_delta, x_box_height], center = true, vertical=[0, 0, 3, 1.5], top=[0, 3, 6, 3], $fn=16);
-                translate([-10, -34, 9]) intersection(){
-                    translate([0, 0, 0]) cube_fillet([10, 37, x_box_height - 42], center = true, vertical=[0, 0, 0, 0], top=[0, 3, 5, 3]);
-                    translate([-10/2, 10, -26]) rotate([45, 0, 0]) cube_fillet([10, 60, 60], radius=2);
-                    translate([0, 0, 21]) cube([10, 60, x_box_height], center = true);
+                intersection() {
+                    translate([-15, -34, 30]) cube([20, 60, x_box_height], center = true);
+                    union() {
+                        translate([-13.75, -14 + z_delta / 2, 24]) cube_fillet([17.5, 14 + z_delta, 55], center = true, vertical=[0, 0, 3, 1.5], top=[0, 3, 6, 3], $fn=16);
+                        translate([-10, -34, 9]) intersection(){
+                            translate([0, 0, -5]) cube_fillet([10, 37, 28], center = true, vertical=[0, 0, 0, 0], top=[0, 3, 5, 3]);
+                            translate([-10/2, 10, -26]) rotate([45, 0, 0]) cube_fillet([10, 60, 60], radius=2);
+                        }
+                    }
                 }
-                translate([-15, -32, 30.25]) rotate([90, 0, 0])  rotate([0, 90, 0]) nema17(places=[1, 0, 1, 1], h=10);
+                translate([-15.5, -32, 30.25]) rotate([90, 0, 0])  rotate([0, 90, 0]) nema17(places=[1, 0, 1, 1], h=11);
             }
 
             // motor screw holes
             translate([21-5, -21-11, 30.25]){
                 // belt hole
-                translate([-30, 11, 0]) cube([10, 36, 20], center = true);
+                translate([-30, 11, -0.25]) cube([11, 36, 24], center = true);
                 //motor mounting holes
-                translate([-29, 0, 0]) rotate([0, 0, 0])  rotate([0, 90, 0]) nema17(places=[1, 1, 0, 1], holes=true, shadow=5, $fn=7, h=8);
+                translate([-28.5, 0, 0]) rotate([0, 0, 0])  rotate([0, 90, 0]) nema17(places=[1, 1, 0, 1], holes=true, shadow=5, $fn=7, h=8);
             }
         }
         //smooth rod caps
@@ -46,18 +51,18 @@ module x_end_motor(){
     }
 }
 
-module x_end_base(vfillet=[3, 3, 3, 3], thru=true, len=40){
+module x_end_base(vfillet=[3, 3, 3, 3], thru=true, len=40, offset=0){
 
     difference(){
         union(){
-            translate([-10 - bushing_xy[0], -10 + len / 2, 30]) cube_fillet([x_box_width, len, x_box_height], center=true, vertical=vfillet, top=[5, 3, 5, 3]);
+            translate([-10 - bushing_xy[0], -10 + len / 2 + offset, 30]) cube_fillet([x_box_width, len, x_box_height], center=true, vertical=vfillet, top=[5, 3, 5, 3]);
 
             translate([0, 0, 4 - bushing_xy[0]]) {
                 //rotate([0, 0, 0]) translate([0, -9.5, 0]) 
-                translate([z_delta, 0, 0]) linear(bushing_z, x_box_height);
+                translate([z_delta, 0, 0]) render(convexity = 5) linear(bushing_z, x_box_height);
                 // Nut trap
                 //difference(){
-                translate([-2, 17, 4]) cube_fillet([20, 16, 8], center = true, vertical=[6, 0, 0, 0], $fn=4);
+                translate([-2, 17, 4]) cube_fillet([20, 16, 8], center = true, vertical=[7, 0, 0, 0], $fn=4);
                     //bottom hole
                 //}
             }
@@ -66,9 +71,9 @@ module x_end_base(vfillet=[3, 3, 3, 3], thru=true, len=40){
         translate([z_delta, 0, 4 - bushing_xy[0]]) linear_negative(bushing_z, x_box_height);
 
         // belt hole
-        translate([-5.5-10+1.5, 22-9, 30]) cube([idler_width + 1, 55, 27], center = true);
+        translate([-5.5 - 10 + 1.5, 22 - 9 + offset, 30]) cube([max(idler_width + 2, 11), 55, 27], center = true);
 
-        translate([-10 - bushing_xy[0], 0, 0]) {
+        translate([-10 - bushing_xy[0], offset, 0]) {
             if(thru == true){
                 translate([0, -11, 6]) rotate([-90, 0, 0]) pushfit_rod(bushing_xy[0] * 2 + 0.2, 50);
                 translate([0, -11, xaxis_rod_distance+6]) rotate([-90, 0, 0]) pushfit_rod(bushing_xy[0] * 2 + 0.2, 50);
@@ -91,20 +96,24 @@ module x_end_base(vfillet=[3, 3, 3, 3], thru=true, len=40){
 
 module x_end_idler(){
     difference() {
-        x_end_base(len=45);
+        x_end_base(len=43 + z_delta, offset=-8 - z_delta);
         // idler hole
-        translate([-14, 26, 29]) rotate([0, 90, 0]) {
-            idler_assy(idler_bearing);
-            translate([0,20,0])
-                cube([idler_assy_r_outer(idler_bearing) * 2, 40, idler_width + 1], center=true);
-            if (idler_bearing[3]) {
-                %translate([0, 0, -(idler_width / 2)]) bearing_guide_outer();
-                %translate([0, 0, idler_width / 2]) mirror([0, 0, 1]) bearing_guide_inner();
-            }
+        translate([-20, -14 - z_delta, 30]) {
+            rotate([0, 90, 0]) cylinder(r=m4_diameter / 2, h=33, center=true, $fn=7);
+            translate([15 - 2 * single_wall_width, 0, 0]) rotate([90, 0, 90]) cylinder(r=m4_nut_diameter_horizontal / 2, h=3, $fn=6);
+
         }
+        translate([-6 - x_box_width, 11, 20]) cube([x_box_width + 1, 11, 21]);
     }
+        %translate([-14, -9, 20]) x_tensioner();
 }
 
+module x_tensioner(len=62, idler_height=20) {
+    idlermount(len=len, rod=3.4, idler_height=idler_height, narrow_len=46, narrow_width=idler_width + 2 - single_wall_width);
+}
+
+
+translate([-40, 0, 4 - bushing_xy[0]]) x_tensioner();
 mirror([0, 0, 0]) x_end_idler(thru=true);
 // translate([40, 40, 0]) x_end_idler(thru=false);
 translate([50, 0, 0]) x_end_motor();

diff --git a/box_frame/y-drivetrain.scad b/box_frame/y-drivetrain.scad
dissimilarity index 69%
index 301a3e8..33f71d3 100644 (file)
--- a/box_frame/y-drivetrain.scad
+++ b/box_frame/y-drivetrain.scad
@@ -1,81 +1,80 @@
-// PRUSA iteration3
-// Y drivetrain (idler and stepper holders)
-// GNU GPL v3
-// Josef Průša <josefprusa@me.com>
-// Václav 'ax' Hůla <axtheb@gmail.com>
-// http://www.reprap.org/wiki/Prusa_Mendel
-// http://github.com/prusajr/PrusaMendel
-
-include <configuration.scad>
-use <inc/bearing-guide.scad>
-
-module motorholder(thickness=10){
-    difference(){
-        union(){
-            // Motor holding part
-            translate([29,-21+50,0])
-            {
-                //#cube([42,42,2], center=true);
-                difference(){
-                    union(){
-                        translate([-21+4.5,0,5]) cube([9,31,thickness], center=true);
-                        nema17([0,1,1,0], thickness=thickness, shadow=false);
-                        mirror([0,0,1])translate([0,0,-10])nema17([0,1,1,0], thickness=thickness, shadow=7);
-                        // Parts joining part
-                        translate([-29,-21,0]) cube([14,30,thickness]);
-                    }
-                    // Motor mounting holes
-                    translate([0,0,thickness]) mirror([0,0,1]) nema17([0,1,1,0], thickness=thickness, holes=true);
-                }
-            }
-
-            // Front holding part
-            translate([0,10,0]) cylinder(h = thickness, r=8);
-            translate([0,20,5]) cube([16,20,thickness], center=true);
-            translate([0,30,0]) cylinder(h = thickness, r=8);
-        }
-        translate([0,10,-1]) cylinder(h = 12, r=4.5);
-        translate([0,30,-1]) cylinder(h = 12, r=4.5);
-    }
-}
-
-module oval(r=4,l=15,h=2){
-translate([l/2,0,0])cylinder(r=r,h=h,$fn=4);
-translate([-l/2,0,0])cylinder(r=r,h=h,$fn=4);
-translate([0,0,h/2])cube([l,r*2,h],center=true);
-}
-
-
-module idlermount(){
-    difference(){
-        union(){
-            translate([0, idler_bearing[2]/2 - 6, 0] ) cube_fillet([16,40 + idler_bearing[2], 10 + idler_width], vertical = [0,0,0,0], top = [3,0,3,0], bottom = [3,0,3,0], center=true);
-        }
-//        translate([0,12,-1]) cylinder(h = 120, r=idler_bearing[2]/2 + 1, $fn=7, center=true);
-        translate([0,-10,-12]) rotate([0,0,90]) oval(r=4.5,l=12,h=25);
-       translate([0,-20,0]) rotate([90,60,0]) cylinder(r=3.4, h=5, $fn=6, center=true);
-       translate([0,-20,0]) rotate([90,0,0]) cylinder(r=3.2/2, h=15, $fn=10, center=true);
-
-//        translate([0,12,0]) {
-//            %cylinder(h = idler_width, r=(idler_bearing[0] / 2) + 2 * single_wall_width, center=true);
-//            cylinder(h = idler_width + 1, r=(idler_bearing[0] / 2) + 8, center=true);
-//        }
-            translate([0,12,0]) {
-                idler_assy(idler_bearing);
-                translate([0, 10, 0]) cube([20, 20, idler_width + 1], center=true);
-            }
-
-    }
-}
-
-
-motorholder();
-translate([32,20,8]) rotate([0,90,0]) idlermount();
-
-if (idler_bearing[3] == 1) {
-    translate([0, -12 - idler_bearing[0] / 2, 0]) {
-        bearing_guide_inner();
-        translate([idler_bearing[0]+10, 0, 0])
-            bearing_guide_outer();
-    }
-}
+// PRUSA iteration3
+// Y drivetrain (idler and stepper holders)
+// GNU GPL v3
+// Josef Průša <josefprusa@me.com>
+// Václav 'ax' Hůla <axtheb@gmail.com>
+// http://www.reprap.org/wiki/Prusa_Mendel
+// http://github.com/prusajr/PrusaMendel
+
+include <configuration.scad>
+use <inc/bearing-guide.scad>
+
+module motorholder(thickness=10){
+    difference(){
+        union(){
+            // Motor holding part
+            translate([29, -21 + 50, 0])
+            {
+                //#cube([42, 42, 2], center=true);
+                difference(){
+                    union(){
+                        translate([-21 + 4.5, 0, 5]) cube([9, 31, thickness], center=true);
+                        nema17([0, 1, 1, 0], thickness=thickness, shadow=false);
+                        mirror([0, 0, 1]) translate([0, 0, -10]) nema17([0, 1, 1, 0], thickness=thickness, shadow=7);
+                        // Parts joining part
+                        translate([-29, -21, 0]) cube([14, 30, thickness]);
+                    }
+                    // Motor mounting holes
+                    translate([0, 0, thickness]) mirror([0, 0, 1]) nema17([0, 1, 1, 0], thickness=thickness, holes=true);
+                }
+            }
+
+            // Front holding part
+            translate([0, 10, 0]) cylinder(h = thickness, r=8);
+            translate([0, 20, 5]) cube([16, 20, thickness], center=true);
+            translate([0, 30, 0]) cylinder(h = thickness, r=8);
+        }
+        translate([0, 10, -1]) cylinder(h = 12, r=4.5);
+        translate([0, 30, -1]) cylinder(h = 12, r=4.5);
+    }
+}
+
+module oval(r=4, l=15, h=2){
+    translate([l / 2, 0, 0]) cylinder(r=r, h=h, $fn=4);
+    translate([-l / 2, 0, 0]) cylinder(r=r, h=h, $fn=4);
+    translate([0, 0, h / 2]) cube([l, r * 2, h], center=true);
+}
+
+
+module idlermount(len=42, narrow_len=0, narrow_width=0, rod=threaded_rod_diameter_horizontal / 2, idler_height=16){
+    difference(){
+        union(){
+            //wide part holding bearing
+            translate([- (10 + idler_width) / 2, -25 + narrow_len, 0] ) cube_fillet([10 + idler_width, len + idler_bearing[2] - narrow_len, idler_height]);
+            if (narrow_len > 0){
+                translate([-narrow_width / 2, -25, 0] ) cube_fillet([narrow_width, len + idler_bearing[2], idler_height], vertical=[0, 0, 2, 2]);
+            }
+        }
+        translate([-12, -10, idler_height / 2]) rotate([90, 0, 90]) oval(r=rod, l=12, h=25);
+        translate([0, -17, idler_height / 2]) rotate([90, 0, 0]) cylinder(r=3.4, h=9, $fn=6, center=true);
+        translate([0, -19, idler_height / 2]) rotate([90, 90, 0]) cylinder(r=3.2/2, h=15, $fn=7, center=true);
+
+            translate([0, len + idler_bearing[2] - 33, idler_height / 2]) {
+                rotate([0, 90, 0]) idler_assy(idler_bearing);
+                translate([0, 10, 0]) cube([idler_width + 1, 20, idler_height + 2], center=true);
+            }
+
+    }
+}
+
+
+motorholder();
+translate([32, 20, 0])  idlermount();
+
+if (idler_bearing[3] == 1) {
+    translate([0, -12 - idler_bearing[0] / 2, 0]) {
+        bearing_guide_inner();
+        translate([idler_bearing[0] + 10, 0, 0])
+            bearing_guide_outer();
+    }
+}