Improved blade holder

Improved blade holder, adjusted geometry for better filament cut

SCAD/mmu2-blade-holder.scad

@@ -5,29 +5,64 @@
 // http://www.reprap.org/wiki/Prusa_Mendel
 // http://prusamendel.org
 
+module blade()
+{
+        difference()
+        {
+            translate([0,0.0,-0.1]) cube([17,1,9]);
+            translate([11.4,-0.4,10]) rotate([0,61,0]) cube([21,1.5,9]);
+            translate([-9.2,-0.4,9]) rotate([0,59,0]) cube([21,1.5,9]);
+        }
+}
+
+module screw()
+{
+    difference()
+    {
+        union()
+        {
+            translate([0,0,0]) rotate([90,0,0]) cylinder(r=1.7, h=10, $fn=50); 
+            translate([0,0,0]) rotate([90,0,0]) cylinder(r=3.1, h=4, $fn=50); 
+        }
+
+        translate([0+1.7,-4.5,-5]) cube([5,1,10]); 
+        translate([-5-1.7,-4.5,-5]) cube([5,1,10]); 
+        translate([-5,-5,-5-1.7]) cube([10,2,5]); 
+        translate([-5,-5,1.7]) cube([10,2,5]); 
+    }
+}
+
 
 module blade_holder()
 {
     difference()
     {
+        union()
+        {
         // base shape
         translate([40,-28,5]) cube([25,4,16]);
+        translate([39.4,-27.75-0.75,6.0]) rotate([0,10.0,0]) blade();
+        }
         
         // screws
-        translate([45,-20,16]) rotate([90,0,0]) cylinder(r=1.7, h=10, $fn=50); 
+        translate([55,-23,12]) screw();
-        translate([55,-20,12]) rotate([90,0,0]) cylinder(r=1.7, h=10, $fn=50); 
+        translate([45,-23,16]) screw();
-        translate([45,-22,16]) rotate([90,0,0]) cylinder(r=3.1, h=4, $fn=50); 
+        
-        translate([55,-22,12]) rotate([90,0,0]) cylinder(r=3.1, h=4, $fn=50);
+        // blade cleanup
+        translate([40,-28.5,-4]) cube([17,2,9]);
         
         // edges
         translate([38,-24,1]) rotate([46,0,0]) cube([30,7,5]);
         translate([38,-23,19]) rotate([45,0,0]) cube([30,5,5]);
         
         // filament path
-        translate([59,-20,4]) rotate([90,0,0]) cylinder(r=1.3, h=10, $fn=50); 
+        translate([59,-25,4]) rotate([90,0,0]) cylinder(r2=1.5, r1=2.6,, h=5, $fn=50); 
+        
     }
+    
+    
 }
-rotate([90,0,0]) 
+rotate([-90,0,0]) 
 blade_holder();
 
 

SCAD/mmu2-front-PTFE-holder.scad

@@ -12,13 +12,18 @@ module front_PTFE_holder()
         union()
         {
             // base shape
-            translate([-16,-30,-15]) cube([84,15,19]);
+            translate([-16,-30.3,-15]) cube([84,15,19.5]);
             translate([-16,-25,-15]) cube([84,10,22.5]);
         }
 
         // blade space
-        translate([-17,-28,2.2]) rotate([45,0,0]) cube([86,2.7,2.7]);
+        difference()
-        translate([-17,-31,3.5]) cube([86,2.7,2.7]);
+        {
+            translate([-17,-28.2,2.2]) rotate([45,0,0]) cube([86,4,4]);
+            translate([-17,-27.8,2.2]) cube([86,4,4]);
+        }
+        
+        translate([-17,-31,3.8]) cube([86,2.7,2.7]);
         translate([-17,-25,5.5]) rotate([45,0,0]) cube([86,4,4]);
         
         // PTFE housing
@@ -33,29 +38,24 @@ module front_PTFE_holder()
         
         // angled front side
         translate([-19,-21,-25]) rotate([52,0,0]) cube([95,10,19]);
-        translate([-19,-38.5,-15]) rotate([5,0,0]) cube([91,10,19]);
+        translate([-19,-38.8,-15]) rotate([5,0,0]) cube([91,10,19]);
         translate([-10,-42,-15]) rotate([0,0,50]) cube([15,30,30]);
         translate([60,-39,-15]) rotate([0,0,-20]) cube([15,30,30]);
         
         // front PTFE tubes holder screws
         translate([9,-14,-1.5]) rotate([90,0,0]) cylinder(r=1.65, h=20, $fn=50); 
         translate([9,-14,-1.5]) rotate([90,0,0]) cylinder(r2=1.65, r1=2.5, h=2, $fn=50); 
-        translate([9,-20,-1.5]) rotate([90,0,0]) cylinder(r=3.1, h=10, $fn=50); 
+        translate([9,-20,-1.5]) rotate([90,0,0]) cylinder(r=3.1, h=11, $fn=50); 
         translate([23,-14,-1.5]) rotate([90,0,0]) cylinder(r=1.65, h=20, $fn=50); 
         translate([23,-14,-1.5]) rotate([90,0,0]) cylinder(r2=1.65, r1=2.5, h=2, $fn=50); 
-        translate([23,-20,-1.5]) rotate([90,0,0]) cylinder(r=3.1, h=10, $fn=50); 
+        translate([23,-20,-1.5]) rotate([90,0,0]) cylinder(r=3.1, h=11, $fn=50); 
         
         translate([37,-14,-1.5]) rotate([90,0,0]) cylinder(r=1.65, h=20, $fn=50); 
         translate([37,-14,-1.5]) rotate([90,0,0]) cylinder(r2=1.65, r1=2.5, h=2, $fn=50); 
-        translate([37,-20,-1.5]) rotate([90,0,0]) cylinder(r=3.1, h=10, $fn=50); 
+        translate([37,-20,-1.5]) rotate([90,0,0]) cylinder(r=3.1, h=11, $fn=50); 
         translate([51,-14,-1.5]) rotate([90,0,0]) cylinder(r=1.65, h=20, $fn=50); 
         translate([51,-14,-1.5]) rotate([90,0,0]) cylinder(r2=1.65, r1=2.5, h=2, $fn=50); 
-        translate([51,-20,-1.5]) rotate([90,0,0]) cylinder(r=3.1, h=10, $fn=50); 
+        translate([51,-20,-1.5]) rotate([90,0,0]) cylinder(r=3.1, h=11, $fn=50); 
-        
-        //version
-        translate([-2,-15.5,-7]) rotate([-90,180,0]) linear_extrude(height = 0.8) 
-        { text("R1",font = "helvetica:style=Bold", size=6, center=true); }    
-    
         
         
     }

SCAD/mmu2-selector-finda.scad

@@ -5,13 +5,15 @@
 // http://www.reprap.org/wiki/Prusa_Mendel
 // http://prusamendel.org
 
+
 module blade()
 {
         difference()
         {
-            translate([0,0,0]) cube([17,0.5,9]);
+            translate([0,0,0]) cube([17,1,9]);
             translate([11.5,-0.5,10]) rotate([0,61,0]) cube([21,1.5,9]);
             translate([-9.3,-0.5,9]) rotate([0,61,0]) cube([21,1.5,9]);
+            translate([-9.3,-0.5,9]) rotate([0,59,0]) cube([21,1.5,9]);
         }
 }
 
@@ -35,6 +37,8 @@ module selector()
         translate([59,-27,4]) rotate([90,0,0]) cylinder(r2=1.3, r1=1.4,h=15, $fn=50); 
         translate([59,-60,4]) rotate([90,0,0]) cylinder(r2=2.5, r1=1.3,h=2, $fn=50);
        
+        translate([59,-27,4]) rotate([90,0,0]) cylinder(r2=1.3, r1=2,h=10, $fn=50); 
+        
         translate([59,-55,4]) rotate([90,0,0]) cylinder(r2=1.3, r1=2.5,h=3, $fn=50);
         translate([59,-52,4]) rotate([90,0,0]) cylinder(r2=2.5, r1=1.3,h=3, $fn=50);
        
@@ -87,11 +91,9 @@ module selector()
         translate([58,-43,-19]) rotate([0,90,0]) cylinder(r2=3.05,r1=3.3, h=4, $fn=50); 
         
         // blade holder
-        difference()
+        translate([39.4,-27.75-0.75,6.0]) rotate([0,10.0,0]) blade();
-            {
+                
-                translate([39.4,-28.15,6.0]) rotate([0,10.0,0]) blade();
+        
-                translate([40.5,-29,3.1]) rotate([0,-24,0]) cube([4,2,11]);
-            }
             
         // blade holder screws
         translate([45,-27,16]) rotate([90,0,0]) cylinder(r=1.7, h=10, $fn=50); 
@@ -131,6 +133,9 @@ module selector()
         translate([62,-57,26.5]) rotate([0,90,0]) cylinder(r=3.2, h=6, $fn=50);
         translate([53,-67+2.9,21+2.8]) cube([2.2,10,5.6]);
         
+        translate([35,-52,10]) rotate([0,90,0]) cylinder(r=2.5, h=35, $fn=50);
+        
+        
         // edges
         translate([47,-45,32]) rotate([-45,0,0]) cube([20,15,10]);
         translate([30,-82,32]) rotate([-50,0,0]) cube([20,30,30]);
@@ -148,10 +153,6 @@ module selector()
             translate([59-1.65,-58.5,-8-1.65]) cube([3.3,2.7,3.3]);
             translate([59-1.65,-58.5,15-1.65]) cube([3.3,2.7,3.3]);
             
-            
-        //version
-        translate([49,-40,-23.3]) rotate([0,180,180]) linear_extrude(height = 0.8) 
-        { text("R1",font = "helvetica:style=Bold", size=5, center=true); } 
         
     }
 }
@@ -166,5 +167,3 @@ selector();
 
 
 
-
-