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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How should I create a Pangolin (Armadillo) structure?
I am new to this forum. I want to create a mechanical structure as depicted in the image A pangolin bag. And further wouls like to automate the closing and opening of the bag. But I am facing issues ...
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How can I attach an arm to a double-flat drive stepper motor?
This is my first robotics experience, outside of one class 10 years ago. I've been Googling this question for about an hour but I can't find an answer!
I'm using a ROHS Step Motor 28BYJ-48 (with an ...
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Rotating two things on the same axis
I'm working on a project where I want two separate shafts to be in the same place. Think of it like a clock where the hour and minute hands move independently. Also like a clock, I want the motors and ...
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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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Pnumatic sulinoid with multiple outputs
I can't figure out what solenoid I would use. Everything I search for comes up with cylinders. Not sure if it's even a sulinoid that I need.
I'd like to have 8 hoses connected to a compressor. I'd ...
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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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DC geared motors or leadscrew and motor for joints
I'm trying to build a quadruped robot. I studied dynamics and to get an idea, I read and watched papers and videos related to robots like ALof and StarlETH and some more. But since this is my first ...
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How to link ends of timing belt into loop
When I buy some length of timing belt I don't know how to link ends of timing belt into loop.
So far I've found one way to do that (thanks to http://www.lasersaur.com/):
http://www.flickr.com/photos/...
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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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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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How to transfer motion between these two parts?
I'm trying to model this arm and I'm having a problem knowing what way could I use to make the red part always parallel to the surface of the table
Ben♦
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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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router tilting mechanism
I am trying to design a very rigid tilting mechanism for my router. For this purpose I had a look at table saws, which seem to be supported by 2 mechanisms, one in front, one at the back, called "...
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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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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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What is the Name of the part I'm describing
I'm looking for a part that will do a particular function. It has to be able to move along one axis and tell me the force that is being exerted on it.
Kind of how like a piston moves inside an ...
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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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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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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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What's the name of a robot manipulator construction with multiple thin arms joined together?
I am seeing on some videos robots picking items and putting them somewhere in order.
Here are some examples:
https://www.youtube.com/watch?v=wg8YYuLLoM0.
https://youtu.be/ggFdvUlp8YU?t=38
How are ...
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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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How to tilt a camera 180 using mirrors
How would you vertically tilt a camera 180 degrees using mirrors?
I'm trying to add a pan/tilt mechanism to a Raspberry Pi's camera. The camera uses one of those flat cables with unstranded wires, ...
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Can you have a career in robotics if you hate mechanics? [closed]
I'm a first year electronics engineering student. I love almost all the aspects of robotics - the electronics, algorithms, control theory etc. I can't stand the mechanical aspect of robotics though.
...
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How has the Mars Exploration Rover (MER) has been working for 11 years if it was designed for 90 Sol? [closed]
The Mars Exploration Rover (MER) Opportunity landed on Mars on January 25, 2004. The rover was originally designed for a 90 Sol mission (a Sol, one Martian day, is slightly longer than an Earth day at ...
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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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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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Fastening sheet steel on nylon
I'm trying to attach a small piece of sheet steel (30mm x 50mm x 1mm) to a small piece of nylon (50mm x 50mm x 4mm). Does anyone know how they could be fastened using small screws (
Any thought ...
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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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Atlas Robot Reference
Boston Dynamics keeps making great robots, however, I dont see any papers that they publish. Although now I can find papers on people using the ATLAS robot, I can not find an original paper detailing ...
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Is this supposed to be a bearing?
I'm looking at the assembly of a tail rotor that should look like this
original image
I wonder if the "tail output shaft stopper" (circled in red) is meant to be a bearing or just a piece of metal ...
CommunityBot
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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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Metal shaft design for a 6mm plastic bevel gear
I have a small POM bevel gear with these dimensions:
It has a 6mm hole for the shaft and a M4 hole for the set screw.
Suppose this bevel gear is meshed with a 45T bevel gear and give a max. output ...
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Attaching a M5 screw shaft to a cog wheel
Does anyone know of a good (low profile) way to attach the threaded (chamfered) end of a M5 screw shaft to a 30MM (30T 1M) plastic cog wheel? Would it be a good idea to widen the shaft hole and just ...
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How a 3d printer moves the header vertically in a MakerBot printer [closed]
I would like to know how the header in this MakerBot printer moves in the vertical up /down direction. Is there a detailed explanation of it including the parts involved?
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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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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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How can this mobile robot rotate so perfectly?
Please have a look at this youtube video.
When this mobile robot operates, the rack (which is said to weight up to 450 kg) can have its Center Of Mass (COM) distributed at any location. For example, ...
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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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POM gears and metal fittings
I'm looking at this setup:
where the POM bevel gears are fitted with some kind of metal (bronze?) tube inside which fits over the shaft. What benefits does this method provide? Is it to allow the ...
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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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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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Is Venetian mirror possible in Autodesk Inventor? [closed]
I see there are things like glass and mirror in Autodesk Inventor Professional 2016 but is there a possibility to have Venetian mirror? So that from one side it would look like a mirror and from the ...
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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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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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Lifting robotic leg with only one servo
Note before I start: I have not actually put anything together yet, i'm still just planning, so any changes that require a shape change or anything like that are accepted.
I'm working on making a ...
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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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What is torque bandwidth in actuated joints and how does it affect the control systems?
The rest of my student team and I are in the process of redesigning an exoskeleton and building it based on an existing one. From the papers that we have been reading there are some references to low, ...
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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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Book on mechanisms [closed]
I wanted to know if there is any sort of archive of mechanisms that contains a brief description of mechanisms like there type of motion and forces involved. Not lengthy derivations and other stuff.
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Lifting Robot To Lift Small Crates [closed]
I am trying to design a robot to lift tote-crates and transport them around in a localized area. I want to be able to carry 3 tote-creates at a time. This robot needs to be able to pickup the creates....
Ben♦
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