Questions tagged [design]

Mechanical, electronic or programmatic design of a robot.

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system design books for robot software

I see in the realm of app/web dev theres quite a few books out there to detail on system design templates, best practices and concepts. For example senior software engineers are often asked to design ...
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Natural frequency of robot arm

I want to design a 3 DOF pick and place robotic arm. I've accomplished stress analysis. now i'm going to do frequency analysis. software give me natural frequencies in different configurations. but i ...
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2answers
30 views

How to convert 2D AutoCad drawing into CODE for CNC machine (laser cutter)?

I am a student of mechanical engineering, currently working on my 3rd-year project. I am designing a sheet-metal enclosure for a belt drive. We have a common laser cutter that could be used for my ...
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1answer
18 views

How to design a robot chassis so as to avoid bending issues?

I'm good on the programming, control systems and electronics aspect of robotics, but need help with a problem with mechanical design. How do I avoid bending of my chassis due to weight? It is a 2 ...
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1answer
23 views

Differential Drive Tricycle WMR with active caster wheel

I'm doing some research for my university project and in particular it concerns a functional design project. I thought it would have been possible to design a 3-wheel mobile robot with an active ...
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1answer
34 views

Counterweight in arm designs

I wonder why most robotic arms use large J2 (shoulder) motors rather than counterweights. What sort of complexity do they add to the design beside increase in overall weight? In fact, rather than ...
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24 views

Proper robotic competitions for one university team (first step) [closed]

I am Bioengineering student at one Iranian middle-rank university and have a small business in building some easy medical devices (PCB and CAD designing with Programming and some market experiments). ...
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2answers
41 views

Robot - Wall Avoiding (Plinko Robot)

I am looking to build a robot that will travel and zig-zag down the hallway.It will be headed towards a wall at roughly 45 degrees and then use a IR LED to detect when a wall is nearby. From there, ...
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1answer
49 views

Path finding: A* vs Fast marching

Context: I am working on a 20 cm x 20 cm indoor robot on a 2D terrain and I need to decide on its path planning algorithm. Algorithms: A* and Fast marching are two popular (and fundamentally ...
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2answers
31 views

What should be the ideal ratio for link lengths ( L1/ L2) of a 2 link manipuator robot with revolute joints?

I am working on making a CAD model of a two link robotic manipulator, with link lengths around 15-20 cm. I am unable to figure how to set their mutual ratio and I want to know whether there is some ...
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27 views

Drive a lead screw with 24BYJ

I'm planning to drive a lead screw on a linear guide using a 24(28)BYJ. The load will be around 400g max and only low speed is needed. I hope the motor is powerful enough. However, I'm trying to drive ...
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18 views

Increasing suction force

I'm trying to increase the suction force of the end effector in a pick and place system. Is it a good idea to add an extra vacuum pump and put it in parallel? AFAIK, having an extra pump in parallel ...
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1answer
57 views

How does this end effector work?

I've seen this linear actuator end effector on a few industrial SCARA 'bots but I am having trouble visualizing how it works internally: It looks like a type of lead screw, but the nut must spin ...
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What is the corrispettive motion convention for robotic systems with X,Y,Z axis?

We built several systems coupling multiple linear micrometric stages. I can't find a standard defining the axis convention of these kinds of systems, it there are any. Regarding the system on the ...
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66 views

Compensator design

I got a plant $G(s)=\left(0.13s+1\right)/s^2$ to design a compensator which provides below demands: Settling time : max 2s Overshoot : max %35 Gain margin : min 10 dB Phase margin : min 30 deg ...
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2answers
52 views

Block algebra and normal algebra inconsistent

I've been playing around with some block maths, mostly trying to remember how it actually works, and I've come to a simple example that should be reduced, however when doing the normal maths, compared ...
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1answer
49 views

Artificial Intelligence and Open source pipeline for automated design, simulation and analysis of robotics systems

I have heard about open source 3D printed robotics projects (https://www.poppy-project.org/en/ is somehow obsolete example). My question is - are there open source holistic/integrated frameworks of ...
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1answer
31 views

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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1answer
18 views

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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1answer
428 views

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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Design of the baseplate of mobile robot

I need to construct a Mobile robots preferably circular type of diameter 30 cm, it will be carrying a payload of 5kg. What will be optimal thickness the baseplate considering the material as aluminium?...
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1answer
56 views

Why can't motors be as elegant as human muscles? Why do we have to use electromagnetism to create movement?

Pretty much as the title says. Why isn't it possible to build motors as microscopically and simply as they're built in humans? Why can't we recreate electronic nerves and muscles?
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1answer
45 views

Robotic Arm Senior Capstone. Electronics/Controls/Sensors Questions

I am a mechanical engineering student currently working on my senior capstone. My team of all MechEs has to build a robotic "arm" where the arm is really just a link/bar of aluminum. The thing we ...
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1answer
75 views

Challenges involved in designing an Industrial Robotic Arm [closed]

I was wondering if any robotics engineers around would kindly, provide suggestions on the following: I was recently hired by a company that wants to implement a robotic solution in manufacturing ...
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1answer
44 views

Ontology/marketplace of robotics components and integration environment (BPEL or CAD for robotics)?

It should be possible to take the formal description of robotics components (in form of ontology, formal API descriptions or other kind of formal specification of the capabilities and requirements of ...
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1answer
28 views

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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1answer
46 views

how do i select light-weight 6dof robot?

I plan to do some scientific research, after modeling and path planning for the robot, The algorithm outputs the Joint control torque(or Joint variable), and then i want to input this result to the ...
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28 views

Autonomous vessel general design

I have been asking a couple of questions here and around on autonomous boats and finally I decided to post the design and gather some feedback. The idea is to build a small vessel capable of advanced ...
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1answer
274 views

Can a state matrix have a row of zeros?

While formulating a state matrix of a system, say a system of a typical cruise controller, \begin{equation} \begin{bmatrix} \dot{v} \end{bmatrix} = \begin{bmatrix} -\frac{b}{m} \end{bmatrix} \begin{...
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112 views

How is a shear pad of remote compliance device formed?

I am researching on mechanical design of remote compliance devices (RCC)†. In the RCC, manufactured by ATI, they use shear pads for lateral compliance. They mention that shear pads are ...
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1answer
892 views

Difference between form closure and force closure

What exactly is the difference between both the above terms? From some of the papers I realize that force closure depends on the frictional forces. Is it correct? Suppose I to grasp a cylindrical ...
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1answer
90 views

is designing a pcb with multiple controllers a good schematic design?

I am trying to design a bot, it has to measure the temp I am using an 8051 so the adc is taking up a lot of i/o pins so I am thinking of switching it out with a thermostat or put another controller ...
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2answers
1k views

Line follower robot with 2 or 4 motors?

I am developing a line follower robot and I am not sure about how many motors should I use: two or four. I'm thinking of using four, but I do not know if it's worth it (it will let the car be heavier, ...
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117 views

Permanent Magnet DC Motor Calcuations

I have to determine speed and torque suitable for my combat robot. I've done some calculations and I need to know whether they're right or not (because they don't seem to be right). Suppose I have ...
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2answers
62 views

Is it better to use software or hardware for object sorting?

For a sorting machine where the objects to be sorted have various sizes, color, shapes, and patterns, is it more optimal (in terms of minimal time of the overall process and maximal precision and ...
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1answer
83 views

Is this large bipedal robot real or realizable?

I saw this link today. This robot seems real, but redditors on a reddit thread argued that it might be CGI. It doesn't seem unfeasible to make such as robot IMO. There isn't anything out of the norm ...
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1answer
188 views

Comparison of Balance Bot design

I'm planning to build a Balance Bot and I would like to know which design should I go with. There's a vertical design such as the ArduRoller and on the other hand, there's the typical stacked type of ...
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68 views

Mechanism to oscillate a human leg?

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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1answer
52 views

Design in the robotics world [closed]

Apologies if this isn't really the right place to be asking, but I was wondering whether third party design firms are ever contracted to design industrial and or consumer robots? If not is it ...
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1answer
662 views

How to get manufactured part from CAD file?

I am working through the book Learning Robotics using Python, which is for Python programmers who want to learn some robotics. Chapter 2 shows you how to use LibreCAD to design the plates and poles ...
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1answer
760 views

Choosing the right Mecanum wheel

I am part of my college robotics team which is preparing for Robocon 2017. We have used Mecanum wheels in last Robocon competition, but we have faced huge slip and vibration. I have looked for all ...
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1answer
127 views

Considerations to design actuators, and loop feedback systems, for a robotic arm [closed]

Let's say I have an industrial sized 6DOF robotic arm. I want to control each one of the six joints despite the non-linearity produced by the chain structure, the gravity and the weight of the loads ...
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2answers
593 views

3 way check valve

I am working on a micro dispensing system, using syringe pump. The design involves a syringe on top to be moved by stepper motor. There would be one liquid reservoir form which the syringe would pull ...
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1answer
246 views

Sphero's logic, how does it work

I'm willing to make my first robot, and I'd like to make one similar to the Sphero. I know I have to add 2 motors in it, and make it work as a hamster ball, but I don't understand how I can make it ...
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1answer
39 views

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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381 views

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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3answers
284 views

Dynamic simulation of compliant elements in quadruped robot

I have a preliminary design for a legged robot that uses compliant elements in the legs and in parallel with the motors for energy recovery during impact as well as a pair of flywheels on the front ...
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1answer
144 views

Automatic sliding window shutter

I want to build an automatic sliding window shutter and need help with part selection and dimensioning. Some assumptions: window width 1.4 m sliding shutter weight 25 kg max speed 0.07 m/s max ...
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339 views

Create 2 CAD files

I found CAD files for the Create on the ROS TurleBot download page (.zip), and shells on the gazebo sim page. Any ideas where the files for the Create 2 could be found?
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542 views

differences between SCARA arm design

I am currently interested in SCARA arm designs and I have few, beginner questions for which I didn't find answers yet. 1/ While comparing professional arms (made by epson, staubli...) I noticed that ...