larger pusher

servo_pusher/servo_pusher2.scad

@@ -117,7 +117,8 @@ module rack (
 	height          = 120,   //height of rack in mm, from tooth top to far side of rack.
     twist           = 0,    //teeth rotate this many degrees from bottom of gear to top.  360 makes the gear a screw with each thread going around once
 	pressure_angle  = 28,   //Controls how straight or bulged the tooth sides are. In degrees.
-	backlash        = 0.0   //gap between two meshing teeth, in the direction along the circumference of the pitch circle
+	backlash        = 0.0,   //gap between two meshing teeth, in the direction along the circumference of the pitch circle
+    additional = 27
 ) {
 	pi = 3.1415926;
 	a = mm_per_tooth / pi; //addendum
@@ -158,7 +159,7 @@ module rack (
                         [7,0,8,15],    // back
                         [8,9,10,11,12,13,14,15],    // top
                         ]);
-                        translate([(number_of_teeth-2)*mm_per_tooth/2,-(height)/2,0])    cube([(number_of_teeth+5)*mm_per_tooth,height-2*a,thickness], center=true);
+                        translate([(number_of_teeth-2)*mm_per_tooth/2-additional,-(height)/2,0])    cube([(number_of_teeth+5)*mm_per_tooth,height-2*a,thickness], center=true);
                     }
 };
 
@@ -220,7 +221,7 @@ module servo_gear() {
     difference() {
     gear(mm_per_tooth,n2,thickness,hole_screw,twist,108);    // servo gear
     translate([0,0,-thickness/2])    cylinder(r=4.5/2, h=kopf_screw*2, center=true, $fn=100);
-    translate([0,0,thickness/2])    gear(0.77,n_servo,thickness_servo*2,0,0,108);    // servo gear
+    translate([0,0,thickness/2])    gear(0.76,n_servo,thickness_servo*2,0,0,0,35);    // servo gear
     };
     echo("pitch radius of servo bearing is: ", pitch_radius(0.79, n_servo));
 }
@@ -236,11 +237,12 @@ module rod_pusher() {
     translate([mm_per_tooth*(-floor(n5/2)-floor(n1/2)+$t+n1/(3/2)-1/2)+100, +d1+0.4, 0]) rotate([0,0,180])
     difference() {
         minkowski() {
-        translate([0,2,0])rotate([90,-90,0])linear_extrude(height=9.7)polygon([[0,0],[-15,10],[15,10]]);
+            translate([-6,2,0])rotate([90,-90,0])
+                linear_extrude(height=9.7)polygon([[0,0],[-15,20],[-15,40],[15,40],[15,20]]);
             cylinder(r=mink,h=0.2,$fn=50);
             rotate([90,0,0])cylinder(r=mink,h=0.2,$fn=50);
         }
-        translate([-3,-8/2-1.6,0])cube([12,10,thickness+0.4],center=true);
+        translate([-3-30/2,-8/2-1.6,0])cube([12+30,10,thickness+0.4],center=true);
     }
 }