main_winch: update design

3d/winshe_main/main_winche.scad

@@ -8,6 +8,7 @@ matt_thingness = 4;
 roller_small_d = 30;
 roller_flansh_d = 50;
 roller_flansh_t = 3;
+roller_side_tollerance = 0.5;
 
 roller_above_base = 30;
 
@@ -23,6 +24,10 @@ side_arch_center_h = 20;
 side_mount_hole_sep = 35;
 side_mount_hole_d = 4;
 
+mid_arch_roler_cut_r = 25;
+mid_winch_flansh_space = roller_flansh_t + 1;
+mid_winch_tollerance = 0.1;
+
 // distance between left bottom of side and the center of the top arch
 side_corner_to_archCenter = sqrt((side_width/2)^2 + side_arch_center_h^2);
 // angle from center of arch between left bottom and trangent point
@@ -33,8 +38,17 @@ side_arch_trangent_a = side_flat_a - acos((side_width/2) / side_corner_to_archCe
 side_flat_trangentPoint_x = (side_width/2) - (side_arch_r*cos(side_arch_trangent_a));
 side_flat_trangentPoint_y = side_arch_center_h + (side_arch_r*sin(side_arch_trangent_a));
 
+// mid top rounding
+mid_topRounding_center_y = side_flat_trangentPoint_y/2;
+mid_topRounding_side_x = side_flat_trangentPoint_x/2;
+o = roller_above_base - mid_topRounding_center_y;
+s = mid_arch_roler_cut_r;
+mid_topRounding_inner_x = (side_width/2) - sqrt(pow(s, 2) - pow(o, 2));
+mid_topRounding_d = mid_topRounding_inner_x - mid_topRounding_side_x;
+mid_topRounding_center_x = mid_topRounding_side_x + mid_topRounding_d/2;
+
 $fa=5;
-$fs=1;
+$fs=0.1;
 
 module motor_mount_2d(){
 	union() {
@@ -83,17 +97,80 @@ module mid_winch_2d() {
 		union() {
 			polygon(points = [
 				[0, 0],
-				[side_flat_trangentPoint_x, side_flat_trangentPoint_y],
-				[side_width-side_flat_trangentPoint_x, side_flat_trangentPoint_y],
+				[side_flat_trangentPoint_x/2, side_flat_trangentPoint_y/2],
+				[side_width-side_flat_trangentPoint_x/2, side_flat_trangentPoint_y/2],
 				[side_width, 0]
 			]);
+			translate([mid_topRounding_center_x, mid_topRounding_center_y])
+				circle(d = mid_topRounding_d);
+			translate([side_width-mid_topRounding_center_x, mid_topRounding_center_y])
+				circle(d = mid_topRounding_d);
+		}
+		translate([side_width/2, roller_above_base])
+			circle(r = mid_arch_roler_cut_r);
+	}
+}
+
+module mid_3d() {
+	mid_winch_width = base_width - mid_winch_flansh_space*2;
+	difference() {
+		union() {
+			// base
+			translate([0, 0, base_hight])
+				cube([base_len+matt_thingness*2, base_width, matt_thingness]);
+			// translate([0, 0, 0]) 
+			// 	cube([matt_thingness, base_width, base_hight+matt_thingness]);
+			// translate([matt_thingness+base_len, 0, 0]) 
+			// 	cube([matt_thingness, base_width, base_hight+matt_thingness]);
+
+			// winches
+			translate([matt_thingness, mid_winch_width+mid_winch_flansh_space, base_hight])
+			rotate([90, 0, 0])
+			linear_extrude(mid_winch_width) {
+				mid_winch_2d();
+				translate([base_len/2, 0])
+					mid_winch_2d();
+			}
+
+			// nibs over side
+			winch_side_a_ratio = side_flat_trangentPoint_x / side_flat_trangentPoint_y;
+			windh_side_mattThinkness_x = winch_side_a_ratio * matt_thingness;
+			translate([0, base_width+matt_thingness, base_hight])
+			rotate([90, 0, 0])
+			linear_extrude(base_width+matt_thingness*2) {
+				polygon(points = [
+					[0, 0],
+					[matt_thingness-mid_winch_tollerance, 0],
+					[matt_thingness-mid_winch_tollerance+windh_side_mattThinkness_x, matt_thingness],
+					[0, matt_thingness]
+				]);
+				translate([matt_thingness+side_width+mid_winch_tollerance, 0]) 
+					polygon(points = [
+						[0, 0],
+						[base_len/2-side_width-mid_winch_tollerance*2, 0],
+						[base_len/2-side_width-mid_winch_tollerance*2+windh_side_mattThinkness_x, matt_thingness],
+						[-windh_side_mattThinkness_x, matt_thingness],
+					]);
+				translate([matt_thingness+base_len/2+side_width+mid_winch_tollerance, 0]) 
+					polygon(points = [
+						[0, 0],
+						[base_len/2-side_width-mid_winch_tollerance+matt_thingness, 0],
+						[base_len/2-side_width-mid_winch_tollerance+matt_thingness, matt_thingness],
+						[-windh_side_mattThinkness_x, matt_thingness],
+					]);
+			}
+		}
+		translate([0, base_width*1.5, base_hight])
+		rotate([90, 0, 0]) {
+			translate([matt_thingness+(side_width/2)-(side_mount_hole_sep/2), side_mount_hole_d/2])
+				cylinder(h = base_width*2, d = side_mount_hole_d+0.0001);
+			translate([matt_thingness+(side_width/2)+(side_mount_hole_sep/2), side_mount_hole_d/2])
+				cylinder(h = base_width*2, d = side_mount_hole_d+0.0001);
+			translate([matt_thingness+base_len/2+(side_width/2)-(side_mount_hole_sep/2), side_mount_hole_d/2])
+				cylinder(h = base_width*2, d = side_mount_hole_d+0.0001);
+			translate([matt_thingness+base_len/2+(side_width/2)+(side_mount_hole_sep/2), side_mount_hole_d/2])
+				cylinder(h = base_width*2, d = side_mount_hole_d+0.0001);
 		}
-		translate([side_width/2, side_arch_center_h])
-			circle(r = side_arch_r);
-		translate([(side_width/2)-(side_mount_hole_sep/2), side_mount_hole_d/2])
-			circle(d = side_mount_hole_d);
-		translate([(side_width/2)+(side_mount_hole_sep/2), side_mount_hole_d/2])
-			circle(d = side_mount_hole_d);
 	}
 }
 
@@ -103,17 +180,56 @@ module side_3d() {
 }
 
 module side_right() {
+	translate([0, -0.0001, -0.0001])
 	rotate([90, 0, 0])
 		side_3d();
 }
 
 module side_left() {
-	translate([0, base_width+matt_thingness])
+	translate([0, base_width+matt_thingness+0.0001, -0.0001])
 	rotate([90, 0, 0])
 		side_3d();
 }
 
-// side_right();
-// side_left();
-linear_extrude(matt_thingness)
-	mid_winch_2d();
+module roller_3d() {
+	union() {
+		rotate([-90, 0, 0])
+			cylinder(d = roller_small_d, h = base_width - roller_side_tollerance*2);
+		rotate([-90, 0, 0])
+			cylinder(d = roller_flansh_d, h = roller_flansh_t);
+		translate([0, base_width - roller_side_tollerance*2-roller_flansh_t])
+		rotate([-90, 0, 0])
+			cylinder(d = roller_flansh_d, h = roller_flansh_t);
+	}
+}
+
+module roller_front() {
+	translate([matt_thingness + side_width/2, 0, base_hight+roller_above_base])
+	translate([0, roller_side_tollerance])
+		roller_3d();
+}
+
+module roller_back() {
+	translate([matt_thingness + base_len/2 + side_width/2, 0, base_hight+roller_above_base])
+	translate([0, roller_side_tollerance])
+		roller_3d();
+}
+
+module full() {
+	side_right();
+	side_left();
+	mid_3d();
+	roller_front();
+	roller_back();
+}
+
+full();
+
+// side_3d();
+// translate([0, 0, -base_hight])
+// 	mid_3d();
+// rotate([90, 0, 0])
+// 	roller_3d();
+
+
+