Import CAD projects and cad-router v1
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Jerry
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const X_AXIS = [1, 0, 0];
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const BOTTOM_FIXED_PIVOT = [14.610456, -171.775187, 23.0];
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const TOP_FIXED_PIVOT_INITIAL = [14.610456, -171.775187, 69.00033];
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const ROLLER_PIVOT_INITIAL = [14.610456, 124.677119, 69.00033];
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const LOWER_ROLLER_CENTER_INITIAL = [14.610456, 124.677119, 23.0];
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const UPPER_ROLLER_CENTER_INITIAL = [14.610456, 124.677119, 69.00033];
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const ACTUATOR_PIVOT_INITIAL = [14.610456, -142.775187, 27.499913];
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const INITIAL_HEIGHT = TOP_FIXED_PIVOT_INITIAL[2] - BOTTOM_FIXED_PIVOT[2];
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const INITIAL_RUN = ROLLER_PIVOT_INITIAL[1] - BOTTOM_FIXED_PIVOT[1];
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const LINK_LENGTH = Math.hypot(INITIAL_RUN, INITIAL_HEIGHT);
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const INITIAL_LINK_ANGLE_DEG = angleDeg(INITIAL_HEIGHT, INITIAL_RUN);
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const ACTUATOR_Y_OFFSET = ACTUATOR_PIVOT_INITIAL[1] - BOTTOM_FIXED_PIVOT[1];
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const ROLLER_RADIUS = 20.0;
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const RUNWAY_MIN_Y = -2.775187;
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const RUNWAY_END_CLEARANCE = 12.0;
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const MAX_RAISED_HEIGHT = maxSafeRaisedHeight();
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const DEFAULT_RAISED_HEIGHT = 215;
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const TOP_ASSEMBLY = ["topAssembly"];
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const RISING_LINKAGE = ["risingLinkage"];
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const DESCENDING_LINKAGE = ["descendingLinkage"];
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const LOWER_ROLLERS = ["lowerRollers"];
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const UPPER_ROLLERS = ["upperRollers"];
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const ACTUATOR_ROD = ["piston", "actuatorCrossShaft"];
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const ACTUATOR_SLIDER = ["actuatorSlider"];
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const MOVING_PARTS = [
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...TOP_ASSEMBLY,
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...RISING_LINKAGE,
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...DESCENDING_LINKAGE,
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...LOWER_ROLLERS,
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...UPPER_ROLLERS,
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...ACTUATOR_ROD,
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...ACTUATOR_SLIDER
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];
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function finite(value, fallback = 0) {
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const numericValue = Number(value);
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return Number.isFinite(numericValue) ? numericValue : fallback;
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}
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function clamp(value, min, max) {
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return Math.min(Math.max(finite(value, min), min), max);
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}
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function clamp01(value) {
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return clamp(value, 0, 1);
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}
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function smooth01(value) {
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const t = clamp01(value);
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return t * t * (3 - (2 * t));
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}
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function lerp(start, end, t) {
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return start + ((end - start) * t);
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}
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function angleDeg(height, run) {
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return Math.atan2(height, run) * 180 / Math.PI;
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}
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function maxSafeRaisedHeight() {
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const minRollerCenterY = RUNWAY_MIN_Y + ROLLER_RADIUS + RUNWAY_END_CLEARANCE;
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const minRun = minRollerCenterY - BOTTOM_FIXED_PIVOT[1];
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return Math.sqrt(Math.max(0, (LINK_LENGTH * LINK_LENGTH) - (minRun * minRun)));
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}
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function cycleLift(cycle) {
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const phase = ((finite(cycle, 0) % 1) + 1) % 1;
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if (phase < 0.42) {
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return smooth01(phase / 0.42);
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}
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if (phase < 0.52) {
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return 1;
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}
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if (phase < 0.94) {
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return 1 - smooth01((phase - 0.52) / 0.42);
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}
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return 0;
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}
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function sampleLift(rawLift, rawRaisedHeight) {
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const lift = smooth01(rawLift);
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const raisedHeight = clamp(rawRaisedHeight, INITIAL_HEIGHT + 5, MAX_RAISED_HEIGHT);
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const height = lerp(INITIAL_HEIGHT, raisedHeight, lift);
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const run = Math.sqrt(Math.max(1e-6, (LINK_LENGTH * LINK_LENGTH) - (height * height)));
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const angle = angleDeg(height, run);
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const rollerY = BOTTOM_FIXED_PIVOT[1] + run;
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const heightDelta = height - INITIAL_HEIGHT;
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const rollerYDelta = rollerY - ROLLER_PIVOT_INITIAL[1];
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// The reference video shows the actuator rising vertically while a green
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// slider follows the lower blue link. Solve that slider by intersecting the
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// lower link with the fixed actuator centerline.
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const actuatorRatio = clamp(ACTUATOR_Y_OFFSET / run, 0, 1);
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const actuatorZ = BOTTOM_FIXED_PIVOT[2] + (height * actuatorRatio);
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const actuatorZDelta = actuatorZ - ACTUATOR_PIVOT_INITIAL[2];
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return {
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angle,
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heightDelta,
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rollerYDelta,
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actuatorZDelta,
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risingAngleDelta: angle - INITIAL_LINK_ANGLE_DEG,
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descendingAngleDelta: -(angle - INITIAL_LINK_ANGLE_DEG),
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wheelSpinDeg: -(rollerYDelta / (2 * Math.PI * ROLLER_RADIUS)) * 360
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};
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}
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function applyVisibility(effects, params) {
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effects.visible("*", true);
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effects.visible("actuator", params.showActuator !== false);
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effects.visible("hardware", params.showHardware !== false);
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}
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export default {
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manifest: {
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schemaVersion: 1,
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step: {
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path: "models/thang010146/adjustable_height_table_2.step"
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},
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label: "Adjustable height table 2",
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description: "Viewer-time scissor-lift animation matched to the reference video: the top stays level, right pivots roll in the runways, and the vertical actuator drives the lower-link slider.",
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units: {
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length: "mm",
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angle: "deg",
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time: "s"
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},
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features: {
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baseAssembly: { ref: "#o1.1", label: "Base assembly" },
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basePlate: { ref: "#o1.1.1", label: "Base plate" },
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baseBearings: { ref: "#o1.1.2,o1.1.3", label: "Base fixed bearings" },
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baseRunways: { ref: "#o1.1.9,o1.1.10", label: "Base roller runways" },
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cylinder: { ref: "#o1.1.8", label: "Fixed cylinder" },
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topAssembly: { ref: "#o1.2", label: "Moving table top" },
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topPlate: { ref: "#o1.2.1", label: "Table top" },
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topBearings: { ref: "#o1.2.2,o1.2.3", label: "Top fixed bearings" },
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topRunways: { ref: "#o1.2.8,o1.2.9", label: "Top roller runways" },
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risingLinkage: { ref: "#o1.3", label: "Rising scissor links", description: "Links from the lower fixed pivots to the upper rolling pivots." },
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descendingLinkage: { ref: "#o1.4", label: "Descending scissor links", description: "Links from the upper fixed pivots to the lower rolling pivots." },
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centralPivot: { ref: "#o1.3.3,o1.3.4,o1.3.5", label: "Central scissor pivot" },
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upperRollerShafts: { ref: "#o1.3.6,o1.3.7,o1.3.8,o1.3.9,o1.3.10,o1.3.11", label: "Upper roller shafts" },
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lowerRollerShafts: { ref: "#o1.4.3,o1.4.4,o1.4.5,o1.4.6,o1.4.7,o1.4.8", label: "Lower roller shafts" },
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upperRollers: { ref: "#o1.8,o1.9", label: "Upper pink rollers" },
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lowerRollers: { ref: "#o1.6,o1.7", label: "Lower pink rollers" },
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piston: { ref: "#o1.5", label: "Piston rod" },
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actuatorSlider: { ref: "#o1.10", label: "Green actuator slider" },
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actuatorCrossShaft: { ref: "#o1.11", label: "Actuator cross shaft" },
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actuator: { ref: "#o1.1.8,o1.5,o1.10,o1.11", label: "Hydraulic actuator" },
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hardware: {
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ref: "#o1.1.4,o1.1.5,o1.1.6,o1.1.7,o1.2.4,o1.2.5,o1.2.6,o1.2.7,o1.3.4,o1.3.5,o1.3.7,o1.3.9,o1.3.10,o1.3.11,o1.4.4,o1.4.5,o1.4.7,o1.4.8",
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label: "Nuts and bolts"
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}
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},
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parameters: {
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lift: { type: "number", label: "Lift", description: "Collapsed to raised scissor-lift travel.", default: 0, min: 0, max: 1, step: 0.01 },
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raisedHeightMm: { type: "number", label: "Raised height", description: "Upper fixed-pivot height above the base fixed pivots at full lift; clamped so rollers stay inside the runways.", default: DEFAULT_RAISED_HEIGHT, min: 80, max: MAX_RAISED_HEIGHT, step: 1, unit: "mm" },
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explode: { type: "number", label: "Explode", description: "Separates the motion groups for inspection after the linkage pose is applied.", default: 0, min: 0, max: 1, step: 0.01 },
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showActuator: { type: "boolean", label: "Actuator", default: true },
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showHardware: { type: "boolean", label: "Hardware", default: true },
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highlightMoving: { type: "boolean", label: "Highlight moving parts", default: false }
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},
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animations: {
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liftLoop: {
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label: "Reference lift loop",
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description: "Low table, hydraulic lift to raised position, brief dwell, and return.",
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duration: 8,
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loop: true,
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update({ cycle, set }) {
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set("lift", cycleLift(cycle));
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}
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},
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inspectExplode: {
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label: "Lift with exploded groups",
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duration: 8,
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loop: true,
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update({ cycle, set }) {
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const lift = cycleLift(cycle);
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set("lift", lift);
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set("explode", Math.sin(lift * Math.PI));
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}
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}
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}
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},
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update({ params, effects }) {
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const pose = sampleLift(params.lift, params.raisedHeightMm);
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const explode = clamp01(params.explode);
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applyVisibility(effects, params);
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effects.style("basePlate", { opacity: 1, edgeOpacity: 0.8 });
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effects.style(["baseBearings", "topBearings"], { opacity: 1, edgeOpacity: 0.8 });
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effects.style(["baseRunways", "topRunways"], { opacity: 1, edgeOpacity: 0.9 });
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effects.style("topPlate", { opacity: 1, edgeOpacity: 0.85 });
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effects.style("risingLinkage", { opacity: 1, edgeOpacity: 1 });
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effects.style("descendingLinkage", { opacity: 1, edgeOpacity: 1 });
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effects.style("centralPivot", { opacity: 1, edgeOpacity: 1 });
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effects.style(["lowerRollerShafts", "upperRollerShafts", "actuatorCrossShaft"], { opacity: 1, edgeOpacity: 0.9 });
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effects.style(["lowerRollers", "upperRollers"], { opacity: 1, edgeOpacity: 1 });
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effects.style("cylinder", { opacity: 1, edgeOpacity: 1 });
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effects.style("piston", { opacity: 1, edgeOpacity: 1 });
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effects.style("actuatorSlider", { opacity: 1, edgeOpacity: 1 });
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effects.style("hardware", { opacity: 1, edgeOpacity: 0.7 });
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if (params.highlightMoving !== false) {
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effects.highlight(MOVING_PARTS, true);
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}
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effects.transform("topAssembly", {
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translate: [0, explode * -10, pose.heightDelta + (explode * 22)]
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});
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effects.transform("risingLinkage", {
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transforms: [
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{
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rotate: {
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axis: X_AXIS,
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origin: BOTTOM_FIXED_PIVOT,
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angleDeg: pose.risingAngleDelta
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}
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},
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{ translate: [explode * 12, explode * -8, explode * 12] }
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]
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});
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effects.transform("descendingLinkage", {
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transforms: [
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{
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rotate: {
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axis: X_AXIS,
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origin: TOP_FIXED_PIVOT_INITIAL,
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angleDeg: pose.descendingAngleDelta
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}
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},
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{ translate: [explode * -12, explode * 8, pose.heightDelta + (explode * 12)] }
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]
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});
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effects.transform("lowerRollers", {
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transforms: [
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{
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rotate: {
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axis: X_AXIS,
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origin: LOWER_ROLLER_CENTER_INITIAL,
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angleDeg: pose.wheelSpinDeg
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}
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},
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{ translate: [0, pose.rollerYDelta + (explode * 10), explode * 8] }
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]
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});
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effects.transform("upperRollers", {
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transforms: [
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{
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rotate: {
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axis: X_AXIS,
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origin: UPPER_ROLLER_CENTER_INITIAL,
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angleDeg: pose.wheelSpinDeg
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}
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},
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{ translate: [0, pose.rollerYDelta + (explode * -10), pose.heightDelta + (explode * 18)] }
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]
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});
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effects.transform(ACTUATOR_ROD, {
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translate: [0, 0, pose.actuatorZDelta + (explode * 10)]
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});
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effects.transform("actuatorSlider", {
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transforms: [
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{
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rotate: {
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axis: X_AXIS,
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origin: ACTUATOR_PIVOT_INITIAL,
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angleDeg: pose.risingAngleDelta
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}
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},
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{ translate: [0, 0, pose.actuatorZDelta + (explode * 14)] }
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]
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});
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}
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};
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