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Tweaks to make interface consistent with blowers.
Added blower_exit_offset(). Fixed corner shape and exit dimensions. Updated images and readme.
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Chris Palmer
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readme.md
10
readme.md
@ -296,11 +296,18 @@ Models of radial blowers.
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| ```blower_wall(type)``` | Side wall thickness |
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| ```blower_width(type)``` | Width of enclosing rectangle |
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### Functions
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| Function | Description |
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|:--- |:--- |
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| ```blower_casing_is_square(type)``` | True for square radial fans, false for spiral shape radial blowers |
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| ```blower_exit_offset(type)``` | Offset of exit's centre from the edge |
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### Modules
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| Module | Description |
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|:--- |:--- |
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| ```blower(type)``` | Draw specified blower |
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| ```blower_hole_positions(type)``` | Translate children to screw hole positions |
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| ```blower_square(type)``` | Draw a square blower |
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@ -309,8 +316,11 @@ Models of radial blowers.
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| ---:|:--- |:---|
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| 1 | ```blower(PE4020)``` | Blower Pengda Technology 4020 |
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| 1 | ```blower(RB5015)``` | Blower Runda RB5015 |
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| 4 | ```screw(M2_cap_screw, 8)``` | Screw M2 cap x 8mm |
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| 3 | ```screw(M3_cap_screw, 20)``` | Screw M3 cap x 20mm |
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| 2 | ```screw(M4_cap_screw, 25)``` | Screw M4 cap x 25mm |
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| 1 | ```blower(BL40x10)``` | Square radial 4010 |
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| 4 | ```washer(M2_washer)``` | Washer M2 x 5mm x 0.3mm |
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| 3 | ```washer(M3_washer)``` | Washer M3 x 7mm x 0.5mm |
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| 2 | ```washer(M4_washer)``` | Washer M4 x 9mm x 0.8mm |
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@ -22,6 +22,7 @@
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//
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include <../utils/core/core.scad>
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use <../utils/rounded_cylinder.scad>
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use <../utils/quadrant.scad>
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use <screw.scad>
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function blower_length(type) = type[2]; //! Length of enclosing rectangle
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@ -40,6 +41,9 @@ function blower_top(type) = type[14]; //! Thickness of the top
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function blower_wall(type) = type[15]; //! Side wall thickness
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function blower_lug(type) = type[16]; //! Height of the lugs
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function blower_casing_is_square(type) = len(blower_screw_holes(type)) > 3; //! True for square radial fans, false for spiral shape radial blowers
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function blower_exit_offset(type) = blower_casing_is_square(type) ? blower_length(type) / 2 : blower_exit(type) / 2; //! Offset of exit's centre from the edge
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fan_colour = grey(20);
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module blower_fan(type, casing_is_square) {
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@ -73,17 +77,18 @@ module blower_square(type) { //! Draw a square blower
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wall = blower_wall(type);
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hole_pitch = (blower_screw_holes(type)[1].x - blower_screw_holes(type)[0].x) / 2;
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corner_radius = width / 2 - hole_pitch;
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corner_inset = (width - blower_exit(type) - blower_wall(type)) / 2;
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corner_inset = (width - blower_exit(type)) / 2;
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module square_inset_corners(remove_center = false)
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difference() {
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//overall outside
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translate([0, eps, 0]) // eps y value required or difference fails, bug in OpenSCAD?
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square([width, width], center = false);
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if (remove_center) {
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// cut out the inside, leaving the corners
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translate([corner_inset + wall, 0])
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square([width - 2 * (wall + corner_inset), width - wall], center = false);
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translate([corner_inset + wall, -eps])
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square([width - 2 * (wall + corner_inset), width - wall + eps], center = false);
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translate([wall, corner_inset + wall])
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square([width - 2 * wall, width - 2 * (wall + corner_inset)], center = false);
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} else {
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@ -92,21 +97,26 @@ module blower_square(type) { //! Draw a square blower
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circle(d = blower_bore(type));
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}
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// corner inset
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for (x = [0, width], y = [0, width])
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translate([x , y])
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circle(r = corner_inset);
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}
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translate([width / 2, width / 2])
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for(i = [0 : 3])
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rotate(i * 90)
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translate([-width / 2 - eps, -width/ 2 - eps])
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quadrant(corner_inset, corner_inset - corner_radius);
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}
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base_height = blower_base(type);
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linear_extrude(base_height)
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difference () {
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rounded_square([width, width], corner_radius, center = false);
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blower_hole_positions(type)
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circle(d = blower_screw_hole(type));
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}
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translate_z(base_height)
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linear_extrude(depth - base_height)
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square_inset_corners(remove_center = true);
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translate_z(depth - base_height)
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linear_extrude(blower_top(type))
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square_inset_corners();
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@ -141,7 +151,7 @@ module blower(type) { //! Draw specified blower
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vitamin(str("blower(", type[0], "): ", type[1]));
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is_square = blower_lug(type) == 0; // it's a square blower if there are no lugs
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is_square = blower_casing_is_square(type); // Description starts with square!
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color(fan_colour) {
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if (is_square) {
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blower_square(type);
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@ -173,6 +183,7 @@ module blower(type) { //! Draw specified blower
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translate(concat(blower_axis(type), [blower_base(type)]))
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circle(d = 2);
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}
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// sides
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linear_extrude(depth)
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difference() {
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@ -195,6 +206,7 @@ module blower(type) { //! Draw specified blower
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// rotor
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translate(concat(blower_axis(type), [blower_base(type) + 1]))
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rounded_cylinder(r = blower_hub(type) / 2, h = blower_hub_height(type) - blower_base(type) - 1, r2 = 1);
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blower_fan(type, is_square);
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}
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}
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@ -16,15 +16,15 @@
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// You should have received a copy of the GNU General Public License along with NopSCADlib.
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// If not, see <https://www.gnu.org/licenses/>.
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//
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// l w d b s h a s s
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// e i e o c u x c c
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// n d p r r b i r r
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// g t t e e s e w
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// t h h w d w w
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// h h s
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RB5015 = ["RB5015", "Blower Runda RB5015", 51.3, 51, 15, 31.5, M4_cap_screw, 26, [27.3, 25.4], 4.5, [[4.3, 45.4], [47.3,7.4]], 20, 14, 1.5, 1.3, 1.2, 15];
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PE4020 = ["PE4020", "Blower Pengda Technology 4020", 40, 40, 20, 27.5, M3_cap_screw, 22, [21.5, 20 ], 3.2, [[37,3],[3,37],[37,37]], 29.3, 17, 1.7, 1.2, 1.3, 13];
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BL40x10 =["R4010", "Square radial 4010", 40, 40,9.5, 27, M2_cap_screw, 16, [24, 20 ], 2.4, [[2,2,1.5],[38,2,1.5],[2,38,1.5],[38,38,1.5]], 28, 9.5, 1.5, 1.5, 1.3, 0];
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// l w d b s h a s s e h b t w l
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// e i e o c u x c c x u a o a u
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// n d p r r b i r r i b s p l g
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// g t t e e s e e t e l
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// t h h w d w w t
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// h h s t t
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RB5015 = ["RB5015", "Blower Runda RB5015", 51.3, 51, 15, 31.5, M4_cap_screw, 26, [27.3, 25.4], 4.5, [[4.3, 45.4], [47.3,7.4]], 20, 14, 1.5, 1.3, 1.2, 15];
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PE4020 = ["PE4020", "Blower Pengda Technology 4020", 40, 40, 20, 27.5, M3_cap_screw, 22, [21.5, 20 ], 3.2, [[37,3],[3,37],[37,37]], 29.3, 17, 1.7, 1.2, 1.3, 13];
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BL40x10 =["BL40x10","Square radial 4010", 40, 40,9.5, 27, M2_cap_screw, 16, [24, 20 ], 2.4, [[2,2],[38,2],[2,38],[38,38]], 30 , 9.5, 1.5, 1.5, 1.1, 1.5];
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blowers = [BL40x10, PE4020, RB5015];
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