Questions tagged [mechanism]
A mechanism is a device designed to transform input forces and movement into a desired set of output forces and the movement.
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What is the front mechanism of this robot's track called?
What is the mechanism on the front of the tracks of this robot called? They are also tracks, but they are able to be moved by the operator, and they are able to function as tracks. I've only seen ...
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Can somebody explain how these forward kinematics matrix equations were formulaed?
Here's the link to the entire answer:
Designing a 5 bar linkage robot: Plot Clock
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I need help figuring out what motor is used in this design
I am learning how to make rigs for high speed motion control. Basically, whatever action needs to be executed must be done by a rig that is triggered at an exact moment.
In this particular case, I ...
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Any books or web resources for robotics mechanical design? [closed]
I plan to build a mechanism with multiple axis, which is similar to a robot. To start, I need to define some specifications such as repeatable precision, speed, acceleration, and payload. Then the ...
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How to distribute tension load on a three footed claw?
Good day!
I am helping my little ones 6 and 7 to develop a robot that can pick up and stack cubes three high as well as gather blocks. They came up with the design that enables them to pick up ...
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How does a two-gear pull-back car toy work?
This is not a robotics question, but this Stack Exchange is the closest I could find to mechanical engineering. Please refer me to a better place to ask this, if one exists. Hopefully someone might ...
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Mechanism to oscillate a needle like object in vertical motion
I need to pop out a needle like object(toothpick,matchstick,etc) from a hole in a
surface and push it back in automatically.I need to make a array of such needles in which each needle's position can ...
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DOF computation
I am new to self-learning robotics and while browsing I found quanser hexapod that has 6 degrees of freedom (https://www.quanser.com/products/hexapod/). I used the Grubler's formula in Lynch & ...
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Motorised steering without shock absorber?
I was looking up on the Curiosity Mars Rover and noticed that the steering appears to be driven by a (geared) stepper:
I presume the drive contains a worm gear to reduce power consumption of the ...
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Rotating a lever with a small servo
I'm trying to rotate a lever link to gently "offload" a load using a servo. Here's a drawing:
Here, the red is a lever, yellow pivot and black is the load. To offload, the lever needs to be turned 90 ...
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Connecting two servo motors to drive one shaft [closed]
I need to connect two servo motors (with internal position control) to rotate one shaft (to control its position), is that possible? and how to avoid synchronization problems?
the servo motor
I am ...
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How modular arm joints work [closed]
Hello I'm trying to figure out how modular arm joints are designed and what kind of bearings/shafts are used for a modular-type robotic arm. Take "UR arm" for example. I believe those 'T-shaped pipes' ...
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How do I achieve this? Grid of dowels powered by piston-like movement
I am completely new to this site and robotics, but I have experience in programming, and programming microcontrollers.
I would like to create a grid of "pixels", where each "pixel" is a metal or ...
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Is it possible to make DIY clone of MakerBeam [closed]
Is it possible to make clone of http://www.makerbeam.eu/ of some easy accessible material like:
wood
plywood
OSB
MDF
HDF
others
Using any type of CNC machine to mill some holes and rails in those ...
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What geared mechanisms can convert various weak stepper motors drive inputs into a higher torque output?
I'm interested in making an arduino robotic arm for something that need precision and/or torque (like CNC), but first, I'm exploring/searching what I would need and how much it would cost.
What I ...
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What should be my spray handle-servo interface for pull mechanism? [closed]
I am an electronics engineering student who recently started working on Arduino. As part of my efforts to wake up on time, I decided that I should make an automatic water spray alarm clock. I have all ...
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How to use thrust bearing with shaft?
I know how to use radial bearings, e.g. ball bearings with shaft. But no matter how much I googled I didn't find any proper clear way to use thrust/axial bearing with shaft.
I downloaded the thrust ...
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How to turn direction of 4 planar wheels into up/down motion?
For the head in a 2D plotter I have 4 gears in an X configuration in the same plane. The gears are driven by belts from the outside in different combinations. The top and bottom gear can be turned in ...
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Linear actuator for impact tests [closed]
I'm puzzling over the remake of an impact testing machine. It's a sort of a robot arm that pushes a probe against a target to test its characteristics.
Right now the machine use air pistons, because ...
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Cloth (non-rigid body) manipulation with computer vision? [closed]
I am currently working on a prototype device to automate cloth ironing task. So basically the mechanical design involves 4 manipulators and a separate manipulator arm with a hot pad (iron) to ...
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Mechanism to oscillate a human leg? [closed]
I'm working on creating a robotic device capable of oscillating an adult human leg using the knee as pivot, being able to constrain the amplitude of oscillation by controlling the mechanism with a ...
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Automated high-precision weighing of individual parts
I'm trying to automate a process wherein individual small parts must be weighed one after another for identification / sorting.
The parts would be fed to the scale using a conveyor. A mechanism is in ...
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How to find center of a disk using robotic arm
Hello I am new to the field of robotics but have some knowledge of raspberry pi, arduino, python.
I want to make Robotic arm which can be used to find the centre of any disk.
There may be disk of ...
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Recommendation for 3D mechanism modeling and simulation software
I'm working on a robotic hand and I would like to simulate different joints and tendon insertion points before starting to actually build it.
I've been googling and found things like Solidworks and ...
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What is the achievable stiffness of a impedance/admittance controlled robot (incl. haptic devices), given its structural and control stiffnesses?
EDIT: I realised I missed the point of the paper completely (thanks to very-skim reading ;) ). So, this part of it I'm relating to is about how much damping - not how much stiffness - should we ...
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Unilateral Torque Constraint on the foot-ground interface
I was studying the basics of legged locomotion and came across the unilateral force and torque constraints at the foot-ground interface.
I understood the implication of the unilateral constraint on ...
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Heavy omnidirectional platform suspension
I'm planning to build an omnidirectional platform that will support about 180kg robotic arm. The platform will be equipped in meccanum wheels. I would like to have some kind of suspension to avoid ...
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Advice on mounting a servo for a nerf sentry gun
I am trying to make a nerf sentry gun to shoot my co workers. I am building it more or less from scratch and have come to the part where I need to come up with plans to assemble it. I am looking for ...
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Software to simulate mechanics of production line
Is there any software where I can simulate production line elements (joints, motors, springs, actuators, movement)? For example I want to simulate mechanism to unwind paper from big roll to weld it ...
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Actuation of three reciprocating blades via conversion of rotary to linear
Sorry if this is out of robotics, but this seemed the closest.
A motor has to be used to rotate three cranks. They are in the same plane, but each should not run at the same time.
Only one that ...
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How to maximize top speed potential for a given motor? [closed]
I have an engineering background however I am new to motors. I am looking to understand what the options exist for maximizing the top speed a motor can produce (say for an RC vehicle) without simply ...
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What are the calculations for a badminton robot and mechanisms?
I am designing a badminton robot but i am very confused about mechanisms needed for a badminton robot and various calculations needed for millisecond response.I am also confused about calculations ...
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Comparison of lifting systems
What kind of systems can be used to make a torso lifting system like the one used by this robot (the black part) :
Rack and pinion
lead screw
scissor lift
can a triple tree help ?
What are the pro ...
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What thread to use for a load-bearing telescoping lift [closed]
I'm trying to find a thread that has good fatigue resistance and strength for a telescoping lift. The lift will lift a weight of around 2-3 kg. I do not intend to spool it as I read that thread with ...
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Name of the linkage (or carriage) in video
I am trying to find the name (nomenclature) of the linkage (or carriage) that is being driven by the dual linear servo (actuator) arrangement in the following Youtube videos:
Servo Basic Concepts
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Simplest and cheapest way to create a spring back latch
My and a friend are hacking together a Nespresso Coffee pod dispenser. We have our heart set on a particular design after thinking up countless ways of dispensing a single pod.
The design has a ...
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How to build a liquid filling machine using piston? [closed]
My team developed a filling machine for liquids which uses a piston to measure and deliver volumes 0.1 to 1 liters into bottles. It is built mostly with mechanical parts and we'd like to replace most ...
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Wires or columns which contract on passing electricity
Background: Introductory robotics competition for college freshmen; Bot has to open 8 jars (with two balls in each of them) in ten minutes and load the balls into a shooting mechanism.
So, we were ...
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How can a memory alloy be used as an alternative to a compressor found in a refrigerator? [closed]
I'm curious about this alloy and how they say it can be used as an alternative to a traditional compressor. Can anyone explain how this would work?
My goal is to understand that use case so I can ...
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Ideas for shooting the ball in a soccer robot [closed]
What is the best option to use for the shooting system of a soccer robot?
I have already implemented a solenoid-based system for shooting and it works perfectly.
However, I'd like some other methods ...
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Wall-E Legs mechanism
I was trying to understand the mechanism of Wall-E's Legs from the Wall-E 3D animation movie of Pixar Animation Studios, how he is able to move up and down and move the tracks on all directions. Can ...
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Design a robot that can apply hot glue to paper
I need to automate a process that involves applying hot glue to paper. I own a standard handheld hot glue gun, like this one:
Sticks of room-temperature glue are fed in the right side. Pulling the ...
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Sliding system basic question
I have a basic question. Imagine a plate, with a hole drilled in each corner. Imagine 4 shafts in these 4 holes,attached to another plate.
Intuition tells me that it would take considerable effort ...
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I need the scheme of iRobot Create 2 [closed]
I've tried to drill a number of holes in my iRobot.
I've missed one of them and I need the electronic scheme of iRobot Create 2 for trying to restore this input of the data cable.
Can you help me with ...
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Double/Triple inverted pendulum always on a cart?
All of the examples of keeping a double/triple inverted pendulum balanced using a PID controller I've seen seem to be on a cart. Like this one https://www.youtube.com/watch?v=cyN-CRNrb3E
How come the ...
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What is the correct name for "servo brackets"?
I refer to these types of brackets as servo brackets, or robot brackets:
I know that the two specific brackets, shown above, are known as a short-U (some vendors refer to them as "C", en lieu of "U") ...
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Orienting rectangular plastic bricks [closed]
As part of a sorting machine, I need to orient a pile of plastic brick-shaped objects (which are all identical in size - about 3cm x 2cm x 1.5cm) so that they always end up with the white side facing ...
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What are hardware components to build a modular robot which consists of several 5x5x5cm modules? [closed]
I am computer science student and I have no knowledge on robotics.
In my project, I am trying to find controllers for modular robots to make them do specific tasks using evolutionary techniques. For ...
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Light weight one axis hinge name/recommendation
I'm attempting to build a crow that can stay upright even when its perch tilts. For that I need to have some single axis hinges (not u-joints). I'm using 3mm rod for my internal supports and am ...
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Choose the structure of the dynamic model for the generalized equations of motion of the robot
I ask the robotics specialists for help as I am a little confused.
I have two subsystems which are shown in the picture below:
One of them is a system of stable and controlled differential equations ...
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