Added a z-motor-bracket to allow the Mendel90 x-axis to be fitted to a Prusa.

Merged credots into README.txt

README.txt

@@ -15,3 +15,17 @@ To view the whole machine model open scad\main.scad. It will take about 8 miniut
 at reasonable speed and changes takes less time to render.
 
 To view a sub assembly open the inididual scad files. Set the exploded flag in config.scad to make exploded views.
+
+Credits
+-------
+Fan model based on http://www.thingiverse.com/thing:8063 by MiseryBot, CC license.
+
+Sangunino model http://www.thingiverse.com/thing:18606 by ax_the_b, CC license.
+
+Spring taken from openscad example 20
+
+x-end.scad and wade.scad use some elements of the Prusa ones by Josef Prusa, GPL license.
+
+z_couplings orginally based on http://www.thingiverse.com/thing:7153 by Griffin_Nicoll, GPL license.
+
+Bearing holders originally based on http://www.thingiverse.com/thing:7755 by Jolijar, CC license.

credits.txt

@@ -1,11 +0,0 @@
-Fan model based on http://www.thingiverse.com/thing:8063 by MiseryBot, CC license.
-
-Sangunino model http://www.thingiverse.com/thing:18606 by ax_the_b, CC license.
-
-Spring taken from openscad example 20
-
-x-end.scad and wade.scad use some elements of the Prusa ones by Josef Prusa, GPL license.
-
-z_couplings orginally based on http://www.thingiverse.com/thing:7153 by Griffin_Nicoll, GPL license.
-
-Bearing holders originally based on http://www.thingiverse.com/thing:7755 by Jolijar, CC license.

scad/prusa-z-motor-bracket.scad

@@ -0,0 +1,141 @@
+//
+// Mendel90
+//
+// GNU GPL v2
+// nop.head@gmail.com
+// hydraraptor.blogspot.com
+//
+// Not actually a part of Mendel90. This allows the Mendle90 x-axis to be used on a Prusa
+//
+include <conf/config.scad>
+use <z-coupling.scad>
+
+corner_rad = 5;
+clamp_rad = 0;
+end_wall = 2;
+thickness = 4;
+length = ceil(NEMA_width(Z_motor));
+height = 2 * thickness +  X_bar_dia;
+
+bar_y = 58.5 / 2;
+width = 2 * bar_y;
+
+big_hole = NEMA_big_hole(Z_motor);
+clamp_height = 12;
+clamp_thickness = bar_clamp_band;
+clamp_screw_clearance = 2;
+clamp_length = Z_bar_dia / 2 + bar_clamp_tab - 2 + clamp_rad;
+gap = 1.5;
+
+clamp_width = Z_bar_dia + 2 * clamp_thickness;
+
+clamp_x = z_bar_offset() + clamp_length - bar_clamp_tab / 2;
+
+function z_bar_offset() = round(NEMA_width(Z_motor)) / 2;
+
+module z_motor_bracket_stl() {
+
+    stl("z_motor_bracket");
+    difference() {
+        union() {
+            //
+            // main body
+            //
+            difference() {
+                translate([0, 0, clamp_height / 2])
+                    cube([length, width, clamp_height], center = true);
+                translate([0, 0, clamp_height / 2 + thickness])
+                    cube([length - 2 * end_wall, width, clamp_height], center = true);
+
+            }
+            //
+            // Bar holders
+            //
+            for(side = [-1, 1])
+                translate([0,  bar_y * side, height / 2]) {
+                    rotate([90, 0, 90])
+                        teardrop(r = height / 2, h = length, center = true);
+                    rotate([-90, 0, 90])
+                        teardrop(r = height / 2, h = length, center = true);
+                }
+            //
+            // bar clamp
+            //
+            translate([z_bar_offset() + clamp_length / 2 - eta, 0, clamp_height / 2 + eta])
+                cube([clamp_length, clamp_width, clamp_height], center = true);
+            translate([z_bar_offset(), 0, clamp_height / 2 + eta])
+                cylinder(h = clamp_height, r = Z_bar_dia/2 + clamp_thickness, center = true);
+        }
+        //
+        // Holes for bars
+        //
+        for(side = [-1, 1])
+            translate([0, bar_y * side, height  / 2])
+                rotate([90, 0, 90])
+                    teardrop(r = M8_clearance_radius, h = length + 1, center = true, truncate = true);
+
+        //
+        // motor holes
+        //
+        poly_cylinder(r = big_hole, h = thickness * 2 + 1, center = true);                   // hole for stepper locating boss
+
+        for(x = NEMA_holes(Z_motor))                                                         // motor screw holes
+            for(y = NEMA_holes(Z_motor))
+                translate([x,y,0])
+                    poly_cylinder(r = M3_clearance_radius, h = 2 * thickness + 1, center = true);
+        //
+        // bar clamp
+        //
+        translate([z_bar_offset() + clamp_length / 2, 0, 0])                            // clamp slot
+            cube([clamp_length, gap,  clamp_height * 2 + 1], center = true);
+
+        translate([clamp_x, Z_bar_dia / 2 + clamp_thickness, clamp_height / 2])
+            rotate([90, 0, 0])
+                nut_trap(screw_clearance_radius, nut_radius, nut_trap_depth, horizontal = true);  // clamp screw
+
+        translate([z_bar_offset(), 0,  0])
+            poly_cylinder(r = Z_bar_dia / 2, h = clamp_height * 2 + 1, center = true);       // hole for z rod
+
+    }
+}
+
+
+module z_motor_assembly() {
+    assembly("z-motor-assembly");
+
+    color([0,1,0]) render() z_motor_bracket_stl();
+    //
+    // Clamp screw and washer
+    //
+    translate([clamp_x, -clamp_width / 2, clamp_height / 2])
+        rotate([90, 0, 0])
+            screw_and_washer(cap_screw, 16);
+    //
+    // Clamp nyloc
+    //
+    translate([clamp_x, clamp_width / 2 - nut_trap_depth, clamp_height / 2])
+        rotate([-90, 0, 0])
+            nut(nut, true);
+
+    //
+    // Motor and screws
+    //
+    NEMA(Z_motor);
+    translate([0,0, thickness])
+        NEMA_screws(Z_motor);
+
+    //
+    // The coupling assembly
+    //
+    translate([0, 0, NEMA_shaft_length(Z_motor) + 1])
+        rotate([0,0,-45])
+            z_coupler_assembly();
+
+   end("z-motor-assembly");
+
+}
+
+if(1)
+    z_motor_bracket_stl();
+else
+    z_motor_assembly();