tidy bowed legs c270 manual (bde880eb) · Commits · OpenFlexure / openflexure-microscope

openscad/libs/main_body_structure.scad

+12 −4

Original line number	Diff line number	Diff line
		@@ -406,6 +406,8 @@ module xy_legs_and_actuators(params){
		cut_depth = (c270_oversize - leg_sep)/2;
		cut_xy = min(cut_depth, leg_dims(params).x - tiny()) * sin(45);
		c270_z_space = 22;
		c270_mid_z = (upper_xy_flex_z(params) - 1) - (c270_z_space + 4)/2;
		cut_round = 2; // c270 cover rounding radius

		manual = !(key_lookup("include_motor_lugs", params));

		@@ -422,8 +424,9 @@ module xy_legs_and_actuators(params){
		leg_frame(params, 135){
		leg(params);
		}
		translate_z(45){
		rounded_cube([c270_oversize, 99, c270_z_space+4], 7, center=true);
		translate_z(c270_mid_z){
		rounding = max(cut_round,5);
		rounded_cube([c270_oversize, 99, c270_z_space+4], rounding, center=true);
		}
		}
		}
		@@ -431,8 +434,13 @@ module xy_legs_and_actuators(params){
		}
		if (manual){
		// make space for the c270 camera
		translate_z(45){
		rounded_cube([c270_oversize, 99, c270_z_space], 6, center=true);
		translate_z(c270_mid_z){
		rounded_cube([c270_oversize, 99, c270_z_space], cut_round, center=true);
		reflect_x(){
		translate([-(leg_sep/2 + (cut_depth - cut_round)), 0, c270_z_space/2 - cut_round]){
		tangent_to_cylinder_plus(r=cut_round, angle=30, box=10);
		}
		}
		}
		}
		}

openscad/libs/utilities.scad

+112 −0

Original line number	Diff line number	Diff line
		@@ -1185,6 +1185,7 @@ module cylinder_to_square_column(d=undef, r=undef, h=undef, transition=undef){
		}
		}


		/* Create a cube that is rounded on top and flat on the bottom

		:param dimensions: `[x, y, z]` dimensions of cube
		@@ -1225,6 +1226,7 @@ module round_top_cube(dimensions, rounding_radius, center=false){
		}
		}


		/* Create a cube with rounded edges and corners

		:param dimensions: `[x, y, z]` dimensions of cube
		@@ -1257,6 +1259,7 @@ module rounded_cube(dimensions, rounding_radius, center=false){
		}
		}


		/* Create a 2D projection-cut through z=0 or very slightly above.

		:param shift: If `true` the object is shifted down by `tiny()` before cutting at z=0
		@@ -1270,6 +1273,115 @@ module flatten(shift=true){
		}


		/* Create a tangent to a cylinder rising in the positive x direction

		Intended for cutting round-chamfered sections from a block using difference().
		The cylinder lies in the y-direction, centred on the origin.
		This version has the rising chamfer in the positive x-direction, see tangent_to_cylinder_minus()
		for a rising chamfer in the negative x-direction.

		### Example
		```example
		difference(){
		translate_x(-20){
		cube([20,20,50],center=false);
		}
		translate_x(-6){
		hull(){
		translate_z(15){
		rotate_x(90){
		cylinder(r=3,h=99, center=true, $fn=16);
		}
		#tangent_to_cylinder_plus(r=3, angle=30, box=10);
		}
		translate_z(5){
		rotate_x(90){
		cylinder(r=3,h=99, center=true, $fn=16);
		}
		}
		translate_z(5-3){
		translate_y(-99/2){
		cube([9,99,10], center=false);
		}
		}
		}
		}
		}
		```

		:param r: radius of the cylinder to tangent
		:param h: height of the cylinder to tangent (in y-direction)
		:param angle: angle, rising to positive x
		:param box: side length of the box that is tangent to the cylinder
		*/
		module tangent_to_cylinder_plus(r=undef, h=99, angle=undef, box=10){
		a = -angle;
		inset = -box/2*((cos(45+a)/sin(45))-1) ;
		up_set = box/2*((sin(45+a)/sin(45))-1);
		x = box/2 - inset + r*sin(a);
		z = r - box/2 - up_set - r*(1-cos(a));
		translate([x, 0, z]){
		rotate_y(a){
		cube([box,99,box], center=true);
		}
		}
		}


		/* Create a tangent to a cylinder rising in the negative x direction

		Intended for cutting round-chamfered sections from a block using difference().
		The cylinder lies in the y-direction, centred on the origin.
		This version has the rising chamfer in the negative x-direction, see tangent_to_cylinder_plus()
		for a rising chamfer in the positive x-direction.

		### Example
		```example
		difference(){
		cube([20,20,50],center=false);

		translate_x(6){
		hull(){
		translate_z(15){
		rotate_x(90){
		cylinder(r=3,h=99, center=true, $fn=16);
		}
		#tangent_to_cylinder_minus(r=3, angle=30, box=10);
		}
		translate_z(5){
		rotate_x(90){
		cylinder(r=3,h=99, center=true, $fn=16);
		}
		}
		translate_z(5-3){
		translate([-9,-99/2,0]){
		cube([9,99,10], center=false);
		}
		}
		}
		}
		}
		```

		:param r: radius of the cylinder to tangent
		:param h: height of the cylinder to tangent (in y-direction)
		:param angle: angle, rising to positive x
		:param box: side length of the box that is tangent to the cylinder
		*/
		module tangent_to_cylinder_minus(r=undef, h=99, angle=undef, box=10){
		a = angle;
		inset = - box - box/2((sin(45+a)/sin(45))-1) + rsin(a);
		up_set = box/2*((cos(45+a)/sin(45))-1);
		x = box/2 + inset;
		z = r - box/2 - up_set - r*(1-cos(a));
		translate([x, 0, z]){
		rotate_y(a){
		cube([box,99,box], center=true);
		}
		}
		}


		/* Make a 2-line text message

		Defaults to a single line if the second line is empty