AI_Assistant/grid-apps-cmms
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add more gear parameters, better dialog

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This commit is contained in:
Stewart Allen 2024-07-19 12:43:13 -04:00
commit 0b69cfdc7e
6 changed files with 56 additions and 46 deletions
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18
src/mesh/tool.js
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@ -740,7 +740,7 @@ mesh.tool = class MeshTool {
// returns points array for a polygon
// extrusion and twist is handled in work.js
generateGear(numTeeth, module, pressureAngle) {
generateGear(numTeeth, module, pressureAngle, offset) {
// Adapted from: Public Domain Parametric Involute Spur Gear by Leemon Baird, 2011, Leemon@Leemon.com http://www.thingiverse.com/thing:5505
// see also http://grabcad.com/questions/tutorial-how-to-model-involute-gears-in-solidworks-and-show-design-intent
@ -787,10 +787,11 @@ mesh.tool = class MeshTool {
// gear parameter setup
let mm_per_tooth = module * pi; // mm size of one gear tooth
let clearance = 0.1; // freedom between two gear centers
let backlash = 0.1; // freedom between two gear contact points
let clearance = offset/2 || 0; // freedom between two gear centers
let backlash = offset || 0; // freedom between two gear contact points
let pressure_angle = degrees_to_radians(pressureAngle);
let gear = [];
let pitch;
// involute gear maker
{
@ -800,24 +801,27 @@ mesh.tool = class MeshTool {
let r = p - (c - p) - clearance; // radius of root circle
let t = mm_per_tooth / 2 - backlash / 2; // tooth thickness at pitch circle
let k = -iang(b, p) - t / 2 / p; // angle where involute meets base circle on side of tooth
let f = 10 + ((p/5) | 0); // increase number of tooth curve points on larger gears
let points = [ // [x,y] points for a single gear tooth
polar(r, -pi / numTeeth),
polar(r, r < b ? k : -pi / numTeeth),
...qf(10, r, b, c, k, 1),
...qf(10, r, b, c, k, -1).reverse(),
...qf(f, r, b, c, k, 1),
...qf(f, r, b, c, k, -1).reverse(),
polar(r, r < b ? -k : pi / numTeeth),
// polar(r, 3.142 / numTeeth) // omit b/c overlaps start when rotated
];
console.log({ p, f });
// create all gear teeth by rotating the first tooth
for (var i = 0; i < numTeeth; i++) {
gear.appendAll(rotate(points, -i * 2 * pi / numTeeth));
}
mesh.log(`gear pitch radius: ${p.round(3)}`);
pitch = p.round(3);
mesh.log(`gear pitch radius: ${pitch}`);
}
return gear;
return { gear, pitch };
}
};