MECHANISMS AND MOTION - ROBOTICS FOCUS

Modeling a cam and follower by sketching a central box, circles, and a rectangle, extruding to form features, and assembling the part with reference planes and constraints.

Model a simple cam and follower by creating and constraining a front-face to a cylinder with tangent relations, extruding a pin through the assembly.

Explore designing an eccentric cam mechanism and follower, adjust cam geometry with sketches, dimensions, and chamfers, and observe how changes propagate to produce a smooth, constant stroke.

Explore common cam types including cylindrical, elliptical, star, and polygon cams, and learn modeling steps with center circles, extrude operations, and round features.

Apply common cam types by selecting elliptical cams, setting a distance of 70 between features, copying the follower, and using midpoint steps to assemble and simulate the cam follower.

Replace the knife edge follower with a roller to reduce wear and improve performance; the lecture guides creating the roller and aligning its center with the follower.

Assemble a cam vice lock in a CAD environment by placing a ground plate, cylinder block, pin, bar, and lever, then create a 1 mm gap and simulate off-center motor.

Explore how an eccentric cam scissors mechanism uses an assembly with cylinders, a motor, and the tangent constraint to cut, simulate physical motion, and ensure reliable action.

Demonstrate how switching from no analysis to physical motion changes part interactions, showing that without a tangent relationship a piece can walk through it.

Explore building and simulating a mechanism using eccentric cam versus a 3-arc triangle, including applying constraints, placing components, fixing interference, and running a motion simulation.

Learn to replace a tangent constraint with physical motion in a scissors mechanism, using parallel faces, extrusion, and simulation to ensure clearances without interference.

Explore aligning parallel scissor blades in a robotics mechanism by adjusting dimensions, repositioning parts, and reestablishing constraints to achieve a tangent relationship and clean cut.

Assemble a cam-driven mechanism by adding base, center cylinder, follower, and cam from the parts library, then mount a motor in rotational mode and simulate motor faults.

Explore how to accelerate hammer drop by swapping cams and adjusting the follower setup, moving from constant-speed motion to a faster drop through cam profile changes and alignment.

Try an alternative hammer setup by deleting the follower, removing relationships, and refining constraints for non-interfering alignment, then simulate the motor and correct hammer orientation.

Explore how random combinations spark radical innovation by building on simple variations, mixing concepts, and reworking parts like a hammer in a CAD workflow.

Explore four-bar mechanisms by grounding the crank, defining the motor input and 60 mm output link, and identifying the coupler as the floating link; adjust link lengths to see motion.

Analyze how the output link sweeps an area and arc length using circles of radii 95 and 64, with 47-degree angle and area rising to 875 when floating link grows.

Convert a 2-D draft mechanism into a 3-D model by importing a metric part, setting dimensions, and extruding parts to form ground, crank, rocker, and coupler.

Center the crank and ground around the y axis, add a rotational motor to the crank, simulate the motion, and export a high-quality three-dimensional motion movie while adjusting mechanism lengths.

Demonstrate real world lifting motion by adjusting a robot mechanism’s links, adding a center circle to the coupler, creating a bucket by extruding, and running a simulation.

Explore adding a hydraulic cylinder to a four-bar lifting mechanism to improve precision, including mounting parts, adjusting travel limits, and aligning axes for controlled motion.

Explore design improvements using a hydraulic link and linear motor to control a mechanism. Measure travel 22 millimeters and reverse motor direction to achieve the correct push path in simulation.

Create and render high-quality robotics motion movie files by mirroring hydraulic cylinder and linear motor movements, adjusting timing and repeats, and exporting with the camera path wizard.

Explore how a four-bar mechanism creates a drag motion by adjusting crank, ground link, and coupler lengths, and create a new drag 1 file in the assembly workflow.

Explore Hoeckens mechanism, a four-bar mechanism converting rotational motion into an approximate straight-line motion, with link lengths 120, 95, and 45 units.

Explore straight line mechanism applications for robotics, then design a simple walking motion by adding a leg part and base, and analyze how appendages enable walking.

Create a two-leg walking mechanism by assembling a four-bar straight-line design, convert subassemblies to adjustable, add motors to cranks, and synchronize motion to achieve opposite leg movement.

Line up the legs with planar align and the float option, then use a cylinder and connectors to connect the crank and extrude for simulated walking motion with the motors.

Assemble a walking mechanism by placing connectors from the parts library, align planes, and drive both legs with a single motor for a compact, stable robot shell.

Adjust the walking mechanism by refining linkages, constraints, and dimensions to improve stability and prevent tipping, then design a body to cover and prototype the final form.

Design a four-bar mechanism to create a crushing motion by adjusting the blue and green links, configuring the rocker and crank, and simulating the crush action.

Set up a crushing motion by extruding a face, sketching on it, mirroring for symmetry, and applying constraints to ensure the target face crushes against its mate in simulation.

Adjust the crank link to resize the sweep area, apply face constraints to refine the motion, and adjust the blue piece during motor simulation to achieve the desired crushing travel.

Fix crushing motion by tweaking link geometry, repositioning faces and centers, extruding and rounding edges, and cutting away material to create an escape path, then simulate motion again.

Explore Grashof criterion for four-bar linkages, predicting crank, rocker, or double-crank configurations and inversions in mechanisms with L, P, Q, and S.

design a four-bar mechanism to approximate straight-line motion with a slider-crank. build and constrain a slider and crank in a cad model, then simulate its motion.

Learn how the crank-slider mechanism drives an engine by assembling engine parts—the engine block, cylinder, piston head, piston rod, and wheel—and simulate its motion with a rotational motor.

Explore the crank slider mechanism used for a reciprocating saw blade; create a blade in cad, set up coordinates, and pattern 25 blades along a curve to simulate cutting motion.

Center a 1 mm blade within a 1.4 mm slot by creating a center plane, aligning faces, and iterating cuts and constraints to ensure precise fit.

Create a guide to keep the reciprocating saw part on track. Sketch from the right view with reference planes, apply a 0.3 tolerance, then extrude and center the part.

Match the guide rail stroke length to the blue piece by extending the guide and adjusting constraints, then inspect minimum distances and remove constraints to resolve interference.

Explore how stroke distance in a crank-slider mechanism is determined through sketch dimensions, a parallel constraint, and trigonometry, illustrating stroke length calculations and motion limits.

Replace the crank with a circular cylinder to create a circular part, extrude 3 millimeters, set constraints and motor, and adjust speed to 800 for realistic motion.

Modify a saw mechanism to a sewing machine by modeling a slider crank, adding a needle and housing, and aligning constraints for a basic sewing machine outline.

Explore sewing machine component design in cad, adjusting housing and needle pass through, using reference planes, extrude features, and stroke tuning to visualize strokes and fit.

Modify the slider crank cutting assembly to a slicing blade by creating, extruding, and trimming the blade. Apply equal setbacks of 1.4 millimeters and add guide rails.

Modify the slider crank cutting setup from cutting to a slicing motion, constrain and ground the blade, then simulate the end-stroke cut to remove material.

Transform a sewing machine mechanism into a stamping press by modifying the housing and resizing features. Add a motor-driven slider-crank stamping motion to drive the operation.

Transform a crank slide into a slotted link mechanism by editing the assembly, adding a centered crank, extruding features, and tangentially constraining a cylinder, then run a motor simulation.

Adjust a slotted link mechanism to fix interference, then assemble a metric slotted-link in the CAD library, aligning base, brace, crank, and pin to convert linear motion to circular motion.

Learn to align Scotch yoke's cylindrical components, apply tangent and concentric constraints, adjust faces with float distance, smooth surfaces, and verify wall thickness from multiple views to ensure mechanism runs.

Master adding functionality to the Scotch yoke mechanism with cylinders, extrusion, mirroring, and holes to drive a piston, while applying precise dimensions and design intent.

Explore the Scotch yoke by rotating the wheel to a 30-degree slot from vertical, locking the y axis, checking the front view, and noting changes in stroke and speed.

Explore how moving the scotch yoke pin left to right changes piston stroke by resizing the driving circle and extending the pin, then observe the resulting stroke in simulation.

Explore the scotch yoke variant by converting a slot to an arc in sloyd, adjust tangent points, arc option, and symmetric offset to analyze stroke and velocity changes.

Explore the Scotch yoke mechanism through a hands-on CAD assembly, creating a link, offset sketches, and tangency constraints to model wave motion with a motor and crank.

Explore the scotch yoke waving hand mechanism and its toy industry applications. Build a hand end by sketching and extruding, then adjust visibility and view the motion.

Import a JPEG image to replace the hand in sketch six, adjust its size and center on the Daisy, and turn off the border before running.

Create a hammer mechanism by sketching rectangles on the YZ reference plane, extruding parts, adding a back pin and hammerhead, and refining with tangent circles.

Adjust the design by dragging components, editing constraints, and adding dimensions to align parts, then fix tangents and ensure the moving assembly runs flat.

Design variations and improvements by sketching lines, extruding and cutting faces, and aligning parts to assemble a peg and bar into a hammer-like component.

Use the image as an outline to create a 3d part by sketching the front view, extruding features, and pushing the material back.

Explore an Iris crank-slider mechanism by assembling Iris parts from class files, placing a motor, outer ring, inner circle, and axis, and ensuring pins stay in channels.

Assemble iris mechanism parts, align leaves with the pole using tangent constraints on the inside faces, and verify movement from the top and bottom views, adjusting orientation around the z-axis.

Add constraints to bottom faces with a 3.17 mm minimum distance and 4 mm separation for tolerance, then refine by 0.15 mm to improve closure and add a manual handle.

Explore crank slider variations by assembling and modifying parts in a CAD environment, attaching crank, rocker, slide block, and motor, then testing fit and motion.

Explore Hoekens four-bar mechanism converting rotation to near straight-line motion, lifting a payload on a chassis with travel 400 mm and link lengths b 100, c 250, d 500 mm.

This lecture demonstrates mechanism layout in Solid Edge, fixing linkage A endpoints, connecting linkage C to the midpoint, and using smart dimensions to maintain lengths during vertical motion.

Convert a mechanism from 2D to 3D by adjusting linkage lengths and hole spacings with synchronous technology, set drive arm to 100 mm and 250 mm links, then assemble.

Assemble the linkage components, including the drive link, align holes and the centerline with a planar alignment, insert pins, and simulate motion with angular limits to cap travel.

Apply a motor to the Hogan's mechanism by configuring an adjustable gearbox, aligning the hex shaft, and animating gear meshing to drive the arm through its designed range of motion.

Design a simple piston-style pump driven by a slider-crank mechanism to move water from a reservoir into an onboard holding tank, using check valves, a piston, crank, and connecting rod.

Add pump components to the slider crank mechanism, including two check valves, fittings, a tube path via express route, and a 450 mm silicone hose to the onboard tank.

Modify a slider-crank pumping mechanism in Solid Edge using Synchronous Technology to increase piston stroke by enlarging crank diameter and connecting arm, adjust piston length, and simulate check valve motion.

Assemble a slingshot-inspired, spring-powered ping pong launcher in Solid Edge, aligning the plunger and launch chamber with extension springs and adjustable length for a controlled trajectory.

Design a cam profile to push back the launch plunger using a golden ratio curve that increases diameter as the cam rotates, then generate a 3D part from this profile.

Model the cam by creating the hub at the origin and the 28 mm center circle. Add a keyed hole, two mounting holes, chamfers, and an orange finish for assembly.

Assemble the cam-driven ping pong ball launcher by mounting the axle, cams, and cotter pins in the launch chamber, then drive with an 18-tooth pinion gear and test motion.