All Questions
Tagged with linear-motion mechanical-engineering
39
questions
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How does the thrust rating of a push rod/linear actuator (I've seen it in both kg and N) relate to the amount of weight it can move?
I'm working on a custom RC project, and I'm needing to move a lever with a "weight" of 5 lbs. 5 lbs is required to actuate the lever, and I need to push it 5 mm. Gravity does not affect the ...
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1
answer
48
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In a lead screw mechanism with a fixed travelling nut, will the screw and its driving mechanism move instead?
https://www.youtube.com/shorts/tUkkOStjz8o
Imagine this but upside down.
Since the platform bolted to the travelling nuts will be pressed against the ground and will have nowhere to go, I reckon the ...
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35
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Accelerate an object in a current-carrying coil
I'm currently trying to come up with some concept ideas for a physics game / riddle. The player has to get an object from one side of a horizontal, current-carrying coil to the other end of the coil ...
- 1
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1
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54
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Reciprocating motion in alternating tracks
I’m trying to find a solution for a simple feeder mechanism where a spring-loaded ”piston” gets pushed in a linear motion, and then on the way back it switches to parallel track, enabling it to be ...
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1
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108
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Using a Lead Screw To Create a Two Stage Clamping System
I want to use a motor to drive a lead screw that first brings down a platform that locks into place and then controls a secondary platform to apply pressure but using only a single motor.
As an ...
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Is there a rotational-to-linear machine that doesn't allow the slider to impart torque while _between_ extremes?
Consider a machine for converting rotational motion to rectilinear translation, such as a crank slider or scotch yoke.
When the slider is at either of its two translational extremes (where the crank ...
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1
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128
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Rotation of point in 3D space
I want to rotate a point (3,4,5) by an angle 45 degrees(0.785398 rad) in 3D space. I have used the standard DCM matrix in the order Rx, Ry and Rz.
Where,
$\theta = 0.785398 [rad]$
$$ Rx= \begin{...
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2
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Simple mechanism to convert linear motion into 180 degrees rotation
I want a simple mechanism to rotate something 180 degrees when another thing moves linearly past/through it. The below is what I have, but it can only work with an offset, so the movement is never ...
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27
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Determining the balancing force for a system of unequal masses for given scenario (angular-momentum, moment-of-inertia, thought-experiment)
Have already asked this on physics-site but has been closed.
As such trying here!
This question is basically a thought experiment.
Let's say there are two pulley's P1 and P2 having equal radius R and ...
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1
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38
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Looking for a mount with 3D play to it
I'm building a lift bed in a van. The basic idea is that each corner of the bed is mounted on a linear track actuator, bed goes up, bed goes down.
I want to be able to control each actuator ...
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49
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How do you make custom springs and where could you buy them?
A friend and I are working on a combat robot that uses a special drive. This drive requires a spring with a large wire diameter (over 3mm), a large outer diameter (40-70mm), and a large pitch (60-90mm)...
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1
answer
70
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Is there such a thing as a double roller/bearing? Two rollers/bearings that share one axis, but can roll independently. [linear/pivot]
I'm looking for two track rollers or bearings that share an axis, but can roll independently of each other. Ideally, they are compact as well ($\leq 1 \text{ in}.$ diameter) and can handle a moderate ...
- 111
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1
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247
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How do I calculate the total force required for a linear actuator? [closed]
How do I calculate the total forcerequired for a linear actuator?
The image enclosed shows a series of door panels, each with a cam that i would like to connect to a linear actuator on the right hand ...
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3
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2k
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Ideas for mechanism for quick reciprocating motion - a 'truly' mechanical switch
I need a mechanism to switch the vertical position of an assembly in as square a profile as possible - i.e. a normal crank mechanism produces a sine wave profile, to explain myself better.
I've seen ...
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1
answer
112
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Linear motion with triangle profile
I am looking for a way to generate a linear motion with a triangle motion profile for my hobby project. The travel distance should be 6cm (so 12 cm for round-trip) with constant speed 1.2 m/s or ...
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