Questions tagged [design]

Questions about or related to design.

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How to determine the resistance provided by cement mortar?

I am attaching a steel rail and post guardrail to the coping of an existing parapet. The actions produced by the guardrail on the coping incur at point A as shown below. However, how do I find out if ...
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How can I make a 48x microscope with combination of lenses?

As part of a project I need to make a device that can give me 48x magnification of nearby objects. Can someone guide me on how to practically approach this problem, i need to be able to take pictures ...
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Design Help Wanted: place the sensors near the arduino and remotely control the humidifier belt 20 ft away, or vice versa?

{This question first asked on Arduino Stack Exchange. Their complaint was that it didn't specifically pertain to Arduinos. Still needing my questions answered. See what you think. Open to suggestions ...
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Question about feeding a group of cylinders into a tube

I'm currently trying to design a mechanism that can feed a bottle of capsules into a tube. However, I've stumbled across the problem where as the capsule is a cylinder, any tube opening will allow for ...
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Where can I information on the design of trampolines?

I'm looking for design considerations for the gymnastic equipment. NOT the software device. In my searches, I find lot of high school physics problems, some miniturized setups using marbles teaching ...
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Electromagnetically launching a model glider

As a hobby project, I'm wondering if it would be plausible to build a small, unpowered R/C glider that's launched at high speed (20-60 m/s, or maybe more) from the ground and then manipulated once it'...
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Design? Or something else

When we develop a new technical device (after creating its general concept), we want to implement it. But before we implement it, we must design it. And for this we go through some stages (the list is ...
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How to build a winning Pumpkin Derby racer?

At the large hotel where I work in the engineering department the big Halloween event is the annual Pumpkin Derby...and we've lost every year to the culinary department. It's embarrasing! This year, ...
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Designing a basic Surveillance system using Johnson Criteria

I would like to design a basic visual spectrum (colour) and IR version for night time that can resolve a target at distance. I have been given distance (10km) and a target size (2m). I chose the focal ...
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What are the issues with this ICE design?

Elaborating along this previous question, could you please invalidate this ICE design with solid authoritative arguments explaining all the flaws? Starting hypothesis: Whatever the purpose, one single ...
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PVC Stripping issue on steel wire with pulley

I am having some issues with a PVC coated steel cable. The PVC often strips when used with a pulley. I wanted to know why this may be happening and possible solutions for it.
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How to model flexible plate between two sticks solidworks

I am following a paper on undulatory fin motion and trying to make a model of it in Solidworks. The problem is stated as having two servo motors with two rays and a flexible rubber membrane between ...
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Best way of SolidWorks rendering for product catalogs

For a catalog of many different parts I want a clear render but not as 'realistic' or detailed as I would get with SW Visualize. Are there any other options or settigns to achieve this? Some examples:
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What is the standard procedure for designing a machine that translates motion?

I apologize in advance as this question might seem very introductory/simple, or it might even sound a bit vague. I am very new to design in any field other than UI/UX design, so I'm definitely very ...
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How do engineers calculate the dimensions of their design ideas? [closed]

You have a design problem statement, which gives you numerical specifications for performance, spatial constraints etc, and you have finally come up with some mechanism ideas you synthesised into a ...
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Threaded Glass Jar Connection

I'm looking to create a connection similar to the one shown in the picture below going from a stainless steel flange to a threaded glass container. Does anyone know of a commercially available ...
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Does this part exist or do I need to design it?

I would like to start designing a Gimbal platform for drone experimentation, I saw that there is some company that have design this one, the main question is the slip ring exist or do I need to design ...
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How to determine of pumps required on a pipeline

I have a 14km long pipe with total head loss of 113m, transporting water at 40m3/h. How do I decide how many pumps I need? I understand headloss is 113m, but I still don't get how does this tells me ...
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Cam-operated clamps: When are logarithmic cams preferred and when are involute cams preferred?

Logarithmic cams are used in rock climbing, but involute cams are used to clamp work pieces when machining. Why are cams with two different profiles preferred for these two applications, which seem ...
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What are the practical solutions to manufacturing this mechanical piece?

My Custom Piece (Measures are in mm) I'm designing a custom mechanism that needs this piece to be able to function, but when i started thinking about how to manufacture it, I started getting confused ...
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I am designing a light that is hung from the end of an arm. How do I calculate the amount of force on the fastener where the arm attaches to the wall

I have a light hanging from an arm that is attached to the wall. I need to make sure that the fastener at the wall end is able to hold the weight. How do I calculate this?
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1 vote
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Structural design of shoulders for rigid suits, what would be the best way to make these?

Well, I don't know if I should post this question on Worldbuilding, Engineering or Game Design stackexchange, but it has been a matter that keeps hammering my brain. The context: Initially, I posted ...
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Does the inertia of a beam section include the material density?

Sorry but I'm a little rusty. When solving a beam of any type of section, must the density be included in the moment of inertia of the section? For example, if I see Navier's formula, I would say ...
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Engineering a pulley system to make an object move when gate is opened

Updated image attached based on @Translators suggestion comment Hi I am looking to make a movable wood cutout via a pulley system on the back my gate/fence (a monkey that tips a top hat when gate is ...
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What's the best way to attach 1 motor to 2 separate wheels on an electric skateboard?

I am in the process of building an electric skateboard. I have all the electronics working and now it's time to put together my skateboard. The problem I am having is that I only have 1 motor and ...
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T9 Torx Screw Thread diameter in Metric System

Helllo, I have to design a part that will have screws that can be taken apart with a T9 Torx Screwdriver. These are the screws that are taken apart first thing here. What is the thread diameter of ...
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Product idea then specification, or specification then product?

I am trying to write a requirements specification for a new product but I am confused about where I should start. Do you start with the product like "A new kettle" and proceed from there, or ...
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What is the definition of depth of cut in machining?

Calculate the machining time required to reduce the shaft diameter by 6 mm if the maximum depth of cut is 2 mm, and also the parting off (cut off) time for the shaft, knowing that: the shaft diameter =...
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Is there a way to get a more 'cubish' version of the bucky-ball structure?

I've read that the reason bucky-ball architecture hasn't taken off in spite of its strength advantage, is because circular profiles don't fit well into rectangular plots, and appliances and furniture ...
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Can/should you support a sagging ceiling from above?

1) How long of a span is too long for rough cut 2x4 inch (45x100) ceiling joists? Pending what those more knowledgable say, my guess is this room at 5.3m is OK, but not great. It has sagged up to 50mm....
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how do you define tolerances for moving parts so that they work properly?

I have a mechanism in CAD that I want to either 3D print or CNC mill. When I went to the school's shop the tech asked me what the tolerances of my parts where and I had no idea. How do I go about ...
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Question on functional design

Functional architectures combined with solution charts are one way of designing a system. My question is, if a product is a complex heirarchy of components (for example a potatoe harvesting machine), ...
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Is there a geometry that meshes exactly with a rope?

I'm in a use case where the outer surface is a gear driven by a motor (that's the easy part) and the inner surface meshes with a metallic (iron) rope. When the part rotates, I want the motor and ...
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One way locking mechanism linear movement

Sorry for the English in advance, it is not my native language :) I am working on a design which involves moving two steel plates in a horizontal linear motion together to clamp around a box. After ...
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Is it possible to convert a structure with a .stl file to a solid structure in Abaqus?

I have a .stl file of a structure and I want to use this file to do a simulation in Abaqus. I need my part to be solid but I don't have any .stp or .iges file of the sructure. So, I imported my .stl ...
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Clutch for rotating axis of mount used for astronomy

a short disclaimer that for me mechanical engineering is a hobby. Please be gentle with me, even if there may be an obvious answer. The main reason for asking here is that searching for the topic you ...
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2 answers
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Measuring angled surfaces with a lidar

I have been trying to create a sensor that detects when a golf club hits a golf ball. My idea was to have a lidar sensor to continuously poll the head of the golf club, and return a positive ...
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1 answer
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How much force needs to be applied on a battery cell to maintain contact?

I'm designing a battery case for cylindrical li-ion batteries similar to the AA battery cases. We need to avoid spot welding to the cell directly since we want may need to replace some cells later for ...
1 vote
1 answer
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Rotational lock design for a landing gear of an aircraft

I want to design a rotational lock mechanism for the landing gear of an aircraft. It's function is to make sure the landing gear stays folded when the aircraft is on air and the landing gear's ...
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2 votes
1 answer
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Expanding a small rubber ring

I have a bunch of small rubber rings that I need to conduct testing on. The rings start at about 15mm ID, and need to expand to 65mm and be held there for months. Right now, my solution for expanding ...
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What camera specs should I look at for smart vision applications?

Currently I'm looking for a camera to work as a 360-degree view of a vehicle but also be used for smart applications, specifically I'm trying to identify certain objects. The 360-degree systems I've ...
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2 answers
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Moving a Bushing in Circular Motion

I am trying to design some way of making a bushing move in a circle. Specifically, I want the center of the bushing to draw out a trajectory that is a 3" diameter circle. I do not want the ...
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How to combine the power of two rods spinning at a different speed into one rod spinning at a combined speed? [duplicate]

I have two rods (that will be powered via something like two water wheels), and I need to combine their power so they both rotate the same rod. Sadly, they may spin at different speeds, and the ...
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Why is my driven dimension affecting my sketch AutoDesk Inventor

I am making a parameter defined sketch that can be changed by editing a few values. When i was doing some math i created a driven dimension to make sure that i was getting the correct value. For some ...
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derive functions for generating projections for the interpenetration of two cylinders for making fittings

​ I want to make custom fittings for constructing large molecular models using copper tubing. I will need to cut a hole in one piece of tubing that will closely fit around another inserted piece. I ...
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Material selection for plunger to be compatible with pressure seal

I am designing a jig to insert a pressure seal into a cap. The jig has a cavity which the cap fits into and then is loaded with the pressure seal which needs to be inserted further using a plunger. I'...
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Projection on plane

How to draw the projection of this 3d image on paper ? I have tried using methods of projection on plane which are given in ND Bhatt book. Dimensions to be assumed by you. I have uploaded my rough try ...
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How to visualize isometric parallel projection?

I read the definition of Isometric Projection from this pdf that Projection plane intersects each coordinate axis in which the object is defined (principal axes) at the same distant from the origin. ...
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Trying to draw rib tangent to a circle AutoCad 3d modeling

I'm trying to draw a rib tangent to a circle but If some one can link a video or a tutorial on how to do that I'd be really thankful here's the drawing in 2d (the rib is highlighted with the red ...
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Influence of design on corrosion control

In "Ahmad. (2006). Principles of corrosion engineering and corrosion control (1st ed.). Elsevier/BH.", it is stated that to fight against metallic corrosion it is more convenient to design (...
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