Merge pull request 'sb/feature/fanDuct' (#5) from sb/feature/fanDuct into master

Reviewed-on: #5

BaseLeft.scad

@@ -19,6 +19,11 @@ module m3 (h=8, lb=1){
     //translate([0,0,-lb])cylinder(h+lb, d=4); // rutex insert
 }
 
+module m2 (h=8, lt=1){
+    translate([0,0,-lt])cylinder(h, d=1.5); // tapped M3
+    //translate([0,0,-lt])cylinder(h, d=3.2); // rutex insert
+}
+
 difference(){
     hull(){
         translate([rc, rc])cylinder(h=t, r=rc);
@@ -51,6 +56,8 @@ difference(){
             translate([x,h-y,0])m3();
         }
     }
-
+    translate([10,0,t/2])rotate([-90,0,0])m2();
+    //cooling fan duct
+    //translate
 }
     

coolingFanDuct.scad

@@ -0,0 +1,118 @@
+/* mount options */
+wt = 2; // wall thickness (min 5mm for m2 inserts)
+bpt = 7; // thickness of base plate
+rd = 4 ; //inner radius of fan duct bend
+wo = 25; // width of opening
+
+zofsmnt = 5; // vertical distance between bottom of fan and bottom of base plate
+xhbl = 22; // distance in x from fan to heat block
+yhbl = -15.5; // distance in y from fan center to center of nozzle (negative to base plate)
+zhbl = 27.2; // distance in z from fan to heat block underside
+zbed = 6.5; // how far does the nozzle protrude out of the heat block?
+xhbln = 11.5; // distance from heat block to nozzle center
+zgap = 2; // gap left to bed/part
+xgap = 3; // gap from duct to heat block
+
+
+/* fan size */
+wtfm = 5; // wall thickness fan mount
+lf  = 40; // length
+tf  = 10; // thickness
+lhf = 34.8; // distance mounting holes
+lof = 28; // length of outlet
+wof = 8; // width of outlet
+rc = 2; // radius corners
+
+
+$fn= 100;
+
+
+/* calculations */
+ho = zbed-zgap-wt; // height of opening in duct tip
+
+a = atan(zbed/(xhbln+xgap));
+b = 90 - a;
+
+vtb = sin(b) * rd; // vertical travel achieved in bend
+htb = rd - (cos(b) * rd); // horizontal travel achieved in bend
+
+xad = xhbl+((tf-wof)/2)-xgap-htb-wt;
+zad = xad*tan(a);
+lad = xad/cos(a);
+lav = zhbl-vtb-zad;
+
+xto = (2*wt)+wof > tf ? (2*wt)+wof : tf;
+xo = xto>tf? wt : (tf-wof)/2;
+xm = xto>tf?xto -(tf-wof)/2-0.01:tf-0.01;
+y = lf+bpt;//+ bpt;
+yo = (lf-lof)/2;
+yb = lf/2-yhbl+wo/2>y-wt? y-wt-wo:lf/2-yhbl-wo/2 < wt? wt:lf/2-yhbl-wo/2;  //(y-wo)/2;
+
+yba = lf/2-yhbl+wo/2>y-wt? y-2*wt-wo:lf/2-yhbl-wo/2 < wt? 0:lf/2-yhbl-wo/2-wt;  //(y-wo)/2;
+ybo = (lf-lof)/2-wt;
+
+posxad = htb+xto;
+poszad = -zhbl+zad;
+
+module through(l=7, lh=2, lt=1, lb=1){
+    union(){
+        translate([0,0,l-lh])cylinder(h=lh+lt, d=4);
+        translate([0,0,-lb])cylinder(h=l+lh+lb, d=2.5);
+    }
+}
+
+module m3 (h=8, lt=1){
+    //translate([0,0,-lt])cylinder(h, d=2.5); // tapped M3
+    translate([0,0,-lt])cylinder(h, d=4); // rutex insert
+}
+
+module m2 (h=8, lt=1){
+    translate([0,0,-lt])cylinder(h, d=1.5); // tapped M3
+    //translate([0,0,-lt])cylinder(h, d=3.2); // rutex insert
+}
+
+module mount(){
+    translate([4,4,-12])difference(){
+        hull(){
+            translate([0,0,6])cylinder(h=6, d=8);
+            translate([4,-4,0])cube([0.01,8,12]);
+        }
+        translate([0,0,12])mirror([0,0,1])through(l=10,lb=1,lt=1,lh=7);
+    }
+}
+
+difference(){
+    union(){
+        translate([posxad,0,poszad])hull(){
+            rotate([0,a,0])translate([-0.01,ybo,-xto])cube([0.01,y-ybo,xto]);
+            rotate([0,a,0])translate([-0.01+lad,yba,-1*ho-2*wt])cube([0.01,y-yba,ho+2*wt]);
+        }
+        translate([xto+rd,ybo,-lav])rotate([-90,a+90,0])rotate_extrude(angle=b){
+            translate([rd,0])square([xto,y-ybo]);
+        }
+        hull(){
+            translate([0,0,-2*wtfm])cube([xto,y,2*wtfm]);
+            translate([0,ybo,-lav])cube([xto,y-ybo,0.01]);
+        //translate([0,0,-lav])cube([xto,y,lav]);
+        }
+        translate([xm,0,-2*wtfm])hull(){
+            cube([0.01,lf-0.4,wtfm*2]);
+            translate([wtfm,0,wtfm])cube([0.01,lf-0.4,wtfm]);
+        }
+    }
+    translate([xo,yo, -lav-0.01])cube([wof,lof,lav+1]);
+    translate([xto+rd,yo,-lav])rotate([-90,a+90,0])rotate_extrude(angle=b){
+        translate([rd+xo,0])square([wof,lof]);
+    }
+    translate([posxad,0,poszad])hull(){
+        rotate([0,a,0])translate([-0.01,yo,-wof-xo])cube([0.01,lof,wof]);
+        rotate([0,a,0])translate([lad,yb,-ho-wt])cube([0.01,wo,ho]);
+    }
+
+    for(y=[8,lf-8])translate([xm+wtfm/2,y,0])mirror([0,0,1])through(l=wtfm,lt=wtfm);
+    translate([xto/2,y-bpt/2,-zofsmnt])mirror([0,0,1])through(l=wtfm,lt=zhbl);
+    translate([-1,y-bpt-0.4,-zofsmnt])cube([xto*2,bpt+1,zofsmnt+1]);
+
+    // cut view
+ //translate([-1,-1,-zhbl-zbed])cube([xto+xhbl+2,lf/2,zhbl+zbed+5]);
+}