Passing first speed tests at 600mm/s.

flange.scad

@@ -0,0 +1,12 @@
+$fa = 0.5;
+$fs = 0.5;
+
+h = 3.5;
+
+difference() {
+	intersection() {
+		cylinder(r1=15, r2=12, h=h, center=true);
+		cylinder(r=14, h=h, center=true);
+	}
+	cylinder(r=10.8, h=h+1, center=true);
+}

idler_end.scad

@@ -0,0 +1,28 @@
+use <motor_end.scad>;
+
+$fa = 12;
+$fs = 0.5;
+
+w = 60; // Smooth rod distance (center to center)
+angle = 91; // Because the timing belt is pulling pretty hard.
+
+module bearing_mount() {
+	translate([0, 0, 1.66]) cylinder(r1=12, r2=9, h=1, center=true);
+	translate([0, 0, -1.66]) cylinder(r1=9, r2=12, h=1, center=true);
+}
+
+module idler_end() {
+	difference() {
+		union() {
+			bracket(28);
+			translate([0, 8, 0]) rotate([angle]) bearing_mount();
+		}
+		translate([0, 8, 0]) rotate([angle])
+			cylinder(r=4, h=40, center=true);
+		for (z = [-7, 7]) {
+			translate([0, 0, z]) screws();
+		}
+	}
+}
+
+idler_end();

motor_end.scad

@@ -21,7 +21,7 @@ module screws() {
 module bracket(h) {
 	difference() {
 		union() {
-			translate([0, -1, 0]) cube([w+12, 21, h], center=true);
+			translate([0, -1, 0]) cube([w+12, 22, h], center=true);
 			// Sandwich mount
 			translate([-w/2, 10, 0]) cylinder(r=6, h=h, center=true);
 			translate([w/2, 10, 0]) cylinder(r=6, h=h, center=true);
@@ -66,14 +66,4 @@ module motor_end() {
 	}
 }
 
-module idler_end() {
-	difference() {
-		bracket(28);
-		rotate([90]) cylinder(r=4, h=40, center=true);
-		for (z = [-7, 7]) {
-			translate([0, 0, z]) screws();
-		}
-	}
-}
-
-rotate([0, 0, 45]) idler_end();
+rotate([0, 0, 45]) motor_end();