mirror of
https://github.com/kennetek/gridfinity-rebuilt-openscad.git
synced 2024-10-18 15:37:25 +00:00
c34de9bff0
This increases readability and usability, while also being more compact. Also updated documentation in gridfinity-rebuilt-bins to explain how heights are calculated.
216 lines
6.3 KiB
OpenSCAD
216 lines
6.3 KiB
OpenSCAD
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// lower base chamfer "radius"
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r_c1 = 0.8;
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// bottom thiccness of bin
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h_bot = 2.2;
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// length of a grid unit
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l_grid = 42;
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// Outside rounded radius of bin
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// Per spec, matches radius of upper base section.
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r_base = 7.5 / 2;
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// Tollerance to make sure cuts don't leave a sliver behind,
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// and that items are properly connected to each other.
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TOLLERANCE = 0.01;
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// ****************************************
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// Magnet / Screw Hole Constants
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// ****************************************
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LAYER_HEIGHT = 0.2;
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MAGNET_HEIGHT = 2;
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SCREW_HOLE_RADIUS = 3 / 2;
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MAGNET_HOLE_RADIUS = 6.5 / 2;
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MAGNET_HOLE_DEPTH = MAGNET_HEIGHT + (LAYER_HEIGHT * 2);
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// distance of hole from side of bin
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d_hole_from_side=8;
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// Based on https://gridfinity.xyz/specification/
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HOLE_DISTANCE_FROM_BOTTOM_EDGE = 4.8;
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// Meassured diameter in Fusion360.
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// Smaller than the magnet to keep it squeezed.
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REFINED_HOLE_RADIUS = 5.86 / 2;
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REFINED_HOLE_HEIGHT = MAGNET_HEIGHT - 0.1;
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// How many layers are between a Gridfinity Refined Hole and the bottom
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REFINED_HOLE_BOTTOM_LAYERS = 2;
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// Experimentally chosen for a press fit.
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MAGNET_HOLE_CRUSH_RIB_INNER_RADIUS = 5.9 / 2;
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// Mostly arbitrarily chosen.
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// 30 ribs does not print with a 0.4mm nozzle.
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// Anything 5 or under produces a hole that is not round.
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MAGNET_HOLE_CRUSH_RIB_COUNT = 8;
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// Radius to add when chamfering magnet and screw holes.
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CHAMFER_ADDITIONAL_RADIUS = 0.8;
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CHAMFER_ANGLE = 45;
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// When countersinking the baseplate, how much to add to the screw radius.
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BASEPLATE_SCREW_COUNTERSINK_ADDITIONAL_RADIUS = 5/2;
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BASEPLATE_SCREW_COUNTERBORE_RADIUS = 5.5/2;
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BASEPLATE_SCREW_COUNTERBORE_HEIGHT = 3;
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// ****************************************
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// internal fillet radius
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r_f2 = 2.8;
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// width of divider between compartments
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d_div = 1.2;
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// minimum wall thickness
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d_wall = 0.95;
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// tolerance fit factor
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d_clear = 0.25;
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// height of tab (yaxis, measured from inner wall)
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d_tabh = 15.85;
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// maximum width of tab
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d_tabw = 42;
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// angle of tab
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a_tab = 36;
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d_wall2 = r_base-r_c1-d_clear*sqrt(2);
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d_magic = -2*d_clear-2*d_wall+d_div;
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// ****************************************
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// Stacking Lip Constants
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// Based on https://gridfinity.xyz/specification/
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// Also includes a support base.
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// ****************************************
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/**
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* @Summary Fillet so the stacking lip does not come to a sharp point.
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*/
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STACKING_LIP_FILLET_RADIUS = 0.6;
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/**
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* @Summary Height of the innermost section. In mm.
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* @Details Used to keep the innermost lip from just being a triangle.
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* Spec implicitly expects wall width to equal stacking lip depth, so does not define this.
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*/
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STACKING_LIP_SUPPORT_HEIGHT = 1.2;
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/**
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* @Summary Stacking lip as defined in the spec. No support.
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*/
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RAW_STACKING_LIP = [
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[0, 0], // Inner tip
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[0.7, 0.7], // Go out 45 degrees
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[0.7, (0.7+1.8)], // Vertical increase
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[(0.7+1.9), (0.7+1.8+1.9)], // Go out 45 degrees
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];
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/**
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* @Summary Size of the stacking lip.
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* @Details "x": How deep the stacking lip protrudes into the bin.
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* Including wall thickness.
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* "y": The height of the stacking lip.
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*/
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STACKING_LIP_SIZE = RAW_STACKING_LIP[3];
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_stacking_lip_support_angle = 45;
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/**
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* @Summary Calculated value for the overall height of the stacking lip.
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* Including support.
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*/
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_stacking_lip_support_height_mm =
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STACKING_LIP_SUPPORT_HEIGHT
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+ tan(90 - _stacking_lip_support_angle) * STACKING_LIP_SIZE.x;
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/**
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* @Summary Stacking lip with a support.
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* @Details Support is so the stacking lip is not floating in mid air when wall width is less than stacking lip depth.
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*/
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STACKING_LIP = concat(RAW_STACKING_LIP, [
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[STACKING_LIP_SIZE.x, -_stacking_lip_support_height_mm], // Down to support bottom
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[0, -STACKING_LIP_SUPPORT_HEIGHT], // Up and in (to bottom inner support)
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[0, 0] // Close the shape. Technically not needed.
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]);
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// ****************************************
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// Base constants
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// Based on https://gridfinity.xyz/specification/
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// ****************************************
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BASE_OUTSIDE_RADIUS = r_base;
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BASE_PROFILE = [
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[0, 0], // Innermost bottom point
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[0.8, 0.8], // Up and out at a 45 degree angle
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[0.8, (0.8+1.8)], // Straight up
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[(0.8+2.15), (0.8+1.8+2.15)], // Up and out at a 45 degree angle
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[0, (0.8+1.8+2.15)], // Go in to form a solid polygon
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[0, 0] //Back to start
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];
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// Maximum [x,y] values/size of the base.
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BASE_PROFILE_MAX = BASE_PROFILE[3];
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// Each unit's base is 41.5mm x 41.5mm
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// Leaving 0.5mm gap with an l_grid of 42
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BASE_SIZE = 41.5;
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/**
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* @summary Height of the raw base
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*/
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h_base = BASE_PROFILE_MAX.y;
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// ****************************************
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// Baseplate constants
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// Based on https://gridfinity.xyz/specification/
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// ****************************************
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BASEPLATE_OUTSIDE_RADIUS = 8 / 2;
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// Polygon describing the raw baseplate lip.
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// Does NOT include clearance height.
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BASEPLATE_LIP = [
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[0, 0], // Innermost bottom point
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[0.7, 0.7], // Up and out at a 45 degree angle
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[0.7, (0.7+1.8)], // Straight up
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[(0.7+2.15), (0.7+1.8+2.15)], // Up and out at a 45 degree angle
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[(0.7+2.15), 0], // Straight down
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[0, 0] //Back to start
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];
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// Height of the baseplate lip.
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// This ads clearance height to the polygon
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// that ensures the base makes contact with the baseplate lip.
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BASEPLATE_LIP_HEIGHT = 5;
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// The minimum height between the baseplate lip and anything below it.
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// Needed to make sure the base always makes contact with the baseplate lip.
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BASEPLATE_CLEARANCE_HEIGHT = BASEPLATE_LIP_HEIGHT - BASEPLATE_LIP[3].y;
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assert(BASEPLATE_CLEARANCE_HEIGHT > 0, "Negative clearance doesn't make sense.");
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// Maximum [x,y] values/size of the baseplate lip.
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// Includes clearance height!
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BASEPLATE_LIP_MAX = [BASEPLATE_LIP[3].x, BASEPLATE_LIP_HEIGHT];
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// ****************************************
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// Weighted Baseplate
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// ****************************************
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// Baseplate bottom part height (part added with weigthed=true)
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bp_h_bot = 6.4;
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// Baseplate bottom cutout rectangle size
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bp_cut_size = 21.4;
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// Baseplate bottom cutout rectangle depth
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bp_cut_depth = 4;
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// Baseplate bottom cutout rounded thingy width
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bp_rcut_width = 8.5;
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// Baseplate bottom cutout rounded thingy left
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bp_rcut_length = 4.25;
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// Baseplate bottom cutout rounded thingy depth
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bp_rcut_depth = 2;
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// ****************************************
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// radius of cutout for skeletonized baseplate
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r_skel = 2;
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// minimum baseplate thickness (when skeletonized)
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h_skel = 1;
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