Questions tagged [product-engineering]
The product-engineering tag has no usage guidance.
64 questions
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Loadcell Reading loss after long time
I am using an stm32f100 series microcontroller and TAL221 loadcell (100g) with Hx711 ADC
The problem is that the loadcell count decreases after about 30 minutes or 1hr
Please help me to solve this.
I ...
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30
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Is the equation for the torque required correct?
Hey guys, I am working on a project in which 2 blades kept at an angle is used to cut stem of a plant. Rollers are used to pinch and force the stem towards the intersecting point of the blades. Lets ...
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Water Dispenser Cooling System
I am interested in creating a water dispenser myself for cooling water, and am looking for a cheap and not too engineering complex concept. I found a water dispenser on Aliexpress, for a very cheap ...
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Seeking Manufacturing Advice: Low-Dose Powder Dosing Device
Hi everyone,
I'm working on a project that requires a device to dispense a very small amount of powder (around 1 gram per second) in short bursts. Ideally, the device would "sneeze" the ...
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Can I test EM r/a/t of some materials using a spectrum analyser and how do I do so?
I am a hobbyist and I was wondering if I can test electromagnetic (radiowave range) reflectance/absorbance/transmittance of some materials using a spectrum analyzer and how do I do so?
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39
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Fuel cell power output
I've spent innumerable time over the years looking for commercially available hydrogen / oxygen fuel cells that might actually be usable in one project concept or another. The best I've ever managed ...
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2
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212
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Is there a word for "counterfeit" products that were in fact manufactured on the official assembly line, but sold cheap lacking brand label?
For example we are talking about special machine vision optics, cheaply manufactured by a chinese company, exclusively made for a well recognized western company with a brand name. The manufacturing ...
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Elastomer that is durable & oxidation resistant
I tend to bundle up my folders & small supplies with ordinary rubber bands (polyisoprene). I find that after a few months these rubber bands would deteriorate & need replacing. Faster even ...
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Simulation modelling of ATM machine
Today I built my First model with Anylogic simulation software on ATM simulation
So ATM is basically here a delay element, which takes delay time parameter as triangular( 1.5, 2, 3.5 ). My idea is I ...
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2
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177
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Why Cups are Frustrum-Shaped
So I noticed that some cups are shaped like frustrums or truncated cones. I looked up why and here(https://www.reddit.com/r/askscience/comments/2v151h/why_are_cups_cone_shaped/) it says that
They are ...
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Why Do the Fingers in Mechanical Pencils Fly Out?
In this video(https://www.kidzsearch.com/kidztube/watch.php?vid=65fbcb9ca), at timestamp 0:27, it says that in mechanical pencils, the fingers have a taper in them that results in them flying out ...
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320
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How A Cord Lock in A Window Unlocks
In this video(https://youtu.be/QvLdVWS_DsM) it says that a cord lock works like this: there is a cylinder which the string moves around, and there is another cylinder which is rough. When you pull out ...
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224
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Why Sodium Sulphate is used in Sponge making
I read that sodium sulphate crystals are used to make sponges. The crystals are mixed in with some other stuff, then put into a mold. The mold is heated, causing the sodium sulphate crystals to melt ...
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2
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108
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Why Green Porcelain was Used for Chalkboards
This site: https://www.businessinsider.com/why-most-blackboards-are-actually-green-and-not-black-2017-11#:~:text=The%20color%20change%20came%20in,likely%20to%20survive%20the%20journey states that ...
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43
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Product Design Scaling Issue
If I want to scale up the product I am designing can I simply double all of my dimensions or is there a better way of going about it?
For context. I was given a finished product and told that it was ...
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272
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What's the difference between a four jaw independent chuck and a faceplate chuck
They both sound to me like the same thing what's the main difference between the 2 , Like something that one can make but the other can't ?
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In which file format are technical drawings saved/stored? How can the data be exchanged between other software?
I just want to know how the information contained in technical drawings is stored? Is there a kind of major representation/file format such as the boundary representation? Is all the information ...
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How is the color pattern applied to this product?
I am new to product design and injection molding, and am only familiar with basic finishing options such as painting, pad printing, and uv printing for decorating consumer products. I found this ...
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Which material, which geometry, which manufacturer? [closed]
I've experience as a development engineer but in software development, electrical engineering, and science experiments. So, even with a significant amount of experience, I've never been in the stage ...
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How to approach potential hazards that may result from user misuse, in a product design phase? [closed]
I am researching guidelines and considerations with respect to user safety when designing commercially sold products that contain user-operated machinery and moving parts (I.e. motors, pulleys, ...
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159
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Get average shape from 10k + files
We have a ton of ergonomic data in STL files. We would like to use that data to define a basic shape for our designs. So what i am looking for an algorithm or software solution that is able to scan ...
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Is it possible to have a reference pulse interpolator for a CNC machine with dc drive?
Is it possible to have a reference pulse interpolator for a CNC machine with a dc drive? it should work with alternating current drive but I am not sure about the direct current drive. please help me ...
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Manufacturing with glass panels [closed]
I would like to design a 3.2-inch LCD display onto a product. The best aesthetic I have seen is using a flush glass screen front face.
My product does not use touch screen. How would I go about ...
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What is the name for a low pressure, low volume air reservoir?
I'm working on a project that requires very precise, but low pressure controls. I'm using a pump to charge a chamber to <15kPa, then a manifold of proportional valves to control output pressures ...
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236
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How does the Nest Learning Thermostat bezel rotate without bearings?
Looking at both the Nest iFixit teardown and this Nest bezel replacement tutorial, it looks like the Nest stainless steel bezel mounts directly to the PCBs and displays inside.
The Nest bezel is able ...
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How to establish metric specifications for ergonomic suitability of a product?
How to establish metric specifications for ergonomic suitability of a product? I meant like for a product say electric iron,it has a metric that it provides different temperatures range to iron, which ...
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1
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99
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What can be the mechanism used in devising a machine that can arrange the dishes properly to make the cleaning faster in the messes/hotels [closed]
In hotels/messes the used plates are often placed haphazardly, and the workers need to pick
the plates carefully to clean them. This leads to longer washing times and longer waiting times for ...
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231
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Mechanical/electronic chalkboard cleaning device to replace the conventional duster to clean the chalkboard
The chalk board duster which is used by teachers to wipe the chalkboard seems very agonizing for them. What new mechanical/electronic devices can be devised to replace conventional chalkboard duster ...
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2
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135
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Is design of "Budweiser's bow-tie shaped beer can " feasible & unique from engineering point of view?
Is design of "Budweiser's bow-tie shaped beer can " feasible & unique from engineering point of view?
Can there be a better design than it?
Like the shape of can is inclined at ten ...
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How is mechanism used in modern projector different from intermittent mechanism used in conventional one?
Do modern projector used for digital class works on same old conventional intermittent mechanism and blocking of light
during change of frame.
What is principal used in modern projector?
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What is the reason for the intermittent motion and blocking of light during change of frame in Conventional projector?
Conventional Film projectors do not advance
from one frame to another by continuous movement of the reels. What is the reason for the intermittent motion and blocking of light
during change of frame ...
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How to design internal wall separation in the PVC tube to use it as a water tanker
I am working on design of the column which contains the water tanker and the pump + electronics at the bottom.
I have tried different solutions and they failed. I would like to know your advice on ...
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Safe temperature thresholds for #2 HDPE and #5 PP plastic
It would be convenient to use a temperature adjustable heat plate (element)/mug warmer for the massive amount of blender bottles accumulated over the years.
What are safe thresholds to safely warm the ...
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From advanced prototype to low-volume production
So to the point. In our project (Robotics project) we mostly use sheet metal and PLA printed parts to build. But we want to level up and be ready for an advanced run and even low-volume production of ...
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I want to test non woven fabrics to see if they are polypropylene, the lining material of N95 masks
A group of us are sewing face masks to prevent the spread of sputum. I've learned that the lining of an N95 mask is made of polypropylene. Polypropylene is also a common interfacing product for ...
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Can wooden mold be used for blow molding?
I should have produced a custom designed bottle, but metal molds are some expensive and because we don't require too many products (we just need 100-200 piece), I need a way to reduce the cost.
So I ...
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Why automakers are/should be making medical ventilators?
I am not very familiar with the mechanics of neither a car nor a medical ventilator. Considering global coronavirus pandemic and shortage of medical ventilators in many countries, I saw some news ...
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Why do Nescafe's (and others'?) instant coffee jars have an inner seal with no "grip" for easy removal? [closed]
For a number of years now, I have been buying instant coffee products. Since the main brand has been Nescafe, this question is specifically about their products, even though I vaguely recall that the ...
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Designing a "ratcheting" spinning wheel with ferrous metal bits
I'm trying to design a freely spinning wheel that will "lock" into a few different configurations. I'm planning on placing a rare earth magnet near a certain point on the wheel, and inserting bits of ...
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415
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What are the essentials of a good PRD (product requirements document) for a new mechanical device
I need to write a non-technical product requirements document (PRD) for a new machine that I want designed.
I need to ensure that I have included all the salient information concisely and to the point....
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2
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707
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When designing scissors, how do you design the blade geometry to ensure good cutting capabilities?
I have been looking online and found there should be two points of contact, one in the blades and one in the pin. In order to achieve this, I assume there's a slight angle of the blades into the ...
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Hermetic Cable Seal With Space Limitations
I have an application wherein I need a hermetic seal at cable exit points from a plastic housing. The cables are not removable. I'd like to achieve this seal using the plastic housing itself by ...
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Which design to maximize friction for a device standing on concrete?
I have a device 4cm X 5cm X 15cm that stands on asphalt/concrete/road. So, the device is taller than its base which makes contact with the asphalt.
I want to maximize the friction so that the device ...
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Coating brass components cheaply
I have seen a number of products made of brass with a silver-looking coating covering the brass on the outside. These products are all quite cheap (for example a small watering can or clothes hooks). ...
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what subject in Mechanical engineering deals with the making of External cases for electronic gadgets?
can anybody tell me what subject in Mechanical engineering deals with the making of External cases for electronic gadgets? I know I need to use CAD/CAM but I am asking this question because I want to ...
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Production technology for hexagonal shaft ?
The shaft is the most important element in my machine, so i rather prefer forging for production technology, the circumscribed circle of the shaft is about 140 mm and the length is about 1400 mm.
...
user14407
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3
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rod technical name
Does anyone knows what is the name of this rod? are these available in the market?
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2k
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Industry standard dimensions for a 5-gallon water cooler?
I'm designing a product to accept a 5-gallon water jug. This is the light blue, transparent plastic kind for potable water that you can buy, swap, or fill at grocery stores. I can take measurements of ...
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Why are CO2 analyzers much more expensive that CO detectors?
This question emerges from Earth Science SE since recently there was asked this. There so far no one had the engineering/ measurement device expertise to answer this.
I am aware that these are ...
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Choosing the best type of portable cord for a consumer electronics product
Consumer-level electrical portable cords come in a variety of types (and gauge, but that's not the subject here) and each must have its rationale, considering the cost constraint (performance/price ...
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