Skip to main content

Questions tagged [design]

Questions about or related to design.

Filter by
Sorted by
Tagged with
0 votes
3 answers
36 views

Electronic enclosure - Long screw holes

am designing an electronic enclosure for a medical device. For assembly reasons, the enclosure is split into two halves, with the bottom half having a depth of 200mm and top half of depth 50mm. I want ...
1 vote
0 answers
27 views

Cryogenic pump - why is this part slotted?

What is the purpose of that slotted area? In my opinion it is done that way in order to prevent it (the impeller) from sticking to the pump body in case it is not properly cooled down. Some people say ...
0 votes
1 answer
132 views

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 ...
1 vote
0 answers
20 views

If building a DIY screw jack, would it be beneficial to add a gimbal to the jack nut, and/or to the screw attachment?

The screw jack will be used twice daily. It will be made out of M24 8.8 grade threaded rod and nut. The nut will travel 300mm, to raise a weight of 50kg by 800m, via a pivoting lever arm. The parts ...
0 votes
1 answer
102 views

How to design an electrical system on water?

Is there a way to design an electrical system (wires, resistors, batteries etc.) on the surface of water so that it doesn't sink, receives heat from water and doesn't deteriorate because of water ...
0 votes
2 answers
92 views

Struggling to find solution: question 1 (Finding the maximum length possible of a rod with specific stresses in action)

Could someone please help with the problem below? Edit 1:My guess on this question is: when I plot in the formulas, the stress rooting from the bending moment overcomes greatly over the other ...
1 vote
1 answer
51 views

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 ...
0 votes
1 answer
133 views

Z-axis auto adjusting fixture device

I am looking for a mechanism that would allow me to support a fixture attached to a 3-axis motorized stage. I have attached a picture of my current design. I trying to design/incorporate some sort of ...
0 votes
3 answers
405 views

Design of Gating & Runner system in Gravity Die Casting

How to design gating and runner system in permanent dies so that material flows smoothly throughout the design without spilling back from the gating channel. What should be the shape of gating system ...
0 votes
1 answer
17 views

Can this new AC motor/generator design work?

I'm currently in the works of developing a vertically suspended flywheel, and I'm trying to figure out the best method to convert rotational energy to electrical energy and vice versa. I don't want to ...
3 votes
2 answers
699 views

How to estimate the number of elevators required in a building?

I've been asked to estimate the number of elevators in a mixed use building with 37 floors (4 basement-parking floors), & design their operation. Are their any specifications/guides/manuals that ...
0 votes
2 answers
137 views

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 ...
2 votes
1 answer
169 views

Most efficient fillet design given an envelope (for stress)

If one has a specified allowed X length and Y height, into which a fillet can be placed to reduce stress concentrations, is there an equation which can be used to determine the optimal shape of the ...
0 votes
0 answers
42 views

How to make Peaucellier–Lipkin linkage work?

I tried in math.stackexchange.com and they send me here. First: Don't crucify me for not "doing math", or asking a dumb question. School was a long time ago, and lose what you don't use. My ...
0 votes
1 answer
48 views

What is the name for a design element which includes trusses within a member?

I cannot think of what to call this design technique, where a truss-like structure is used within a member to provide strength and rigidity with minimized weight. I’ve included a picture which ...
0 votes
1 answer
40 views

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 ...
0 votes
1 answer
54 views

Residential 120V AC vs 12V DC

Can I repurpose residential LED lights (slim, 120V recessed) for my RV by directly providing them with 12V DC power, or is a more accurate approach required to bypass the existing circuit board?
0 votes
1 answer
66 views

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 ...
0 votes
1 answer
50 views

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 ...
1 vote
2 answers
67 views

Help me choose an approach to gpu cooler design

I want to remake my gpu's cooler cause the original fans have a terrible bearing sound on low rpm and no amount of software solution helped. Anyway, I want to use 3x nf-a9x14 pwm 92mm fans as its fits ...
0 votes
1 answer
71 views

Can somebody please explain this Design for Welding guideline and its use case?

This is the rule. Please help. Also identify a usecase.
1 vote
1 answer
126 views

Applying ISO fits to radial bearings

Do you need to take the bearing size tolerance into account when creating the tolerances for the mating hole/shaft when using ISO 286 tolerances? For example, a 125 mm OD bearing with a desired H7 ...
1 vote
1 answer
64 views

how to interpret ISO2768-mK angular tolerance

How to apply tolerance for angle based on ISO-2768-mK? Cause I am confused about the statement "Permissible deviations in degrees and minutes for ranges in nominal lengths". Lets say I have ...
1 vote
1 answer
110 views

Application of Bernoulli's equation between stationary and moving reference points

I'm working on a pipe design problem using Bernoulli's equation, from first principles. The pipe is from a water storage reservoir (point 1) and discharges into a river (point 2). These are my two ...
0 votes
1 answer
109 views

Need new pressure switch mechanism for a 3 phase compressor using a 220V AC Drive

I've bought a vintage Quincy 216 air compressor. Actually there are duel Quincy 216's - each has a separate 3 phase motor. One motor is 1.5 HP and the other motor is 2 HP. The compressors share a ...
4 votes
1 answer
859 views

Finding the velocity of water flowing through a gravel filled pipe

I have a scenario where I have water flowing through a gravel filled pipe, and I need to find the velocity. The pipe is gravity fed (no pumps). My approach is to find the seepage velocity ($V_s$) ...
1 vote
2 answers
236 views

Operation of Fruit Blender-Mixer

I was wondering how blenders used in the kitchen for the purpose of creating smoothies, soups, etc. operate, particularly, how the rotation of their blade is achieved, i.e. what sort of motor is used ...
1 vote
2 answers
83 views

Dose adapter sleeve hinder the axial displacement of inner ring of spherical roller bearings?

This is supposed to be the locating bearing in my design, the outer ring is supported by the housing and a taconite seal (taconite seal is hidden). So it is fixed in place and can't move at all. ...
0 votes
2 answers
128 views

How can I calculate the bending and compression stress on my pawl?

I am working on a project where I am designing a linear ratchet and pawl locking mechanism for a lift. The pawl is going to have to withstand 6000 lb of weight that is going to be transferred by the ...
1 vote
2 answers
61 views

Replicating an impact impulse

I am building a test-rig for a device. I have operational data showing the device experiences impact loads resembling a half-sine pulse with width dt and magnitude F. The test rig's purpose is to ...
1 vote
0 answers
28 views

Custom Rack and Pinion for 1979 Firebird

I am attempting to convert my firebird to a rack and pinion steering system, so I can introduce later modifications. https://www.unisteer.com/products/1975-81-firebird-trans-am-power-rack-and-pinion-...
0 votes
0 answers
26 views

Need help with VHDL

Game Design Let us create a little game with a seven-segment display (SSD). There are two inputs, “clk” and “stop”, and one output “dout(6:0)” that feeds the output to the seven segment display as ...
1 vote
0 answers
30 views

Need help for Fire Detection System design

As a Building Services Engineering student, my current project involves the design of fire detection system of a newly-installed at-home EV charging system. The EV chargers are installed in the ...
0 votes
1 answer
69 views

What would be an ideal material to use for O-rings on a canister in a lubricant-less, high-velocity pneumatic tube system?

I am interested in building an experimental lubricant-less pneumatic tube system in which the canister will be propelled up to a high-velocity, reaching a peak velocity of approximately 100 m/s before ...
0 votes
0 answers
21 views

New Method for a Passive Magnetic Bearing

Is it possible to create a passive magnetic bearing by layering the outside of a shaft with a magnetic film and placing a magnetic ring on the outside. The outer layer of the film would have a north ...
2 votes
2 answers
216 views

How to design an enclosure around the load cell (Beam type)?

Hardware and Electronics Used: Arduino UNO, HX711 ADC Load cell amplifier, Load Cell (2Kg); Currently, I am working on a project which requires me to put load cell along with the other circuitry in an ...
1 vote
1 answer
782 views

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 ...
0 votes
1 answer
38 views

How to CAD: smooth width transition in sheet-metal bends

I am working with FreeCAD 0.20 and Sheet Metal work bench 0.2.63, but universal CAD tips are also welcomed. As shown in the image, I would like to bend sheet metal with smoothly chancing width along ...
0 votes
1 answer
73 views

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 ...
1 vote
1 answer
211 views

Detachable tubing connections (joints) for frame assembly

I am looking into fabricating a steel tubing frame that needs to be dis/assembled (applies to many larger furniture like bed, shelving unit, wardrobe, cupboard, cabinet, ...). What are the variants of ...
0 votes
3 answers
286 views

Best support for a granite table top?: Flat bar 316L Stainless Steel or equal box section or unequal box section

Project is outdoor granite topped table. Table legs are two isosceles trapezoids crossed together at 90 degrees, with the legs having an internal angle of 80 degrees, made from 100 x 100 x 4mm 316L ...
1 vote
2 answers
83 views

Mechanical Clock Oscillation time too small

I am trying to build a mechanical clock, but my pendulum doesn't swing for very long when stopping. Increasing mass only takes me so far. In this video, he uses a much longer pendulum than 25 cm, but ...
1 vote
3 answers
232 views

What is the best heat and moisture resistant adhesive?

I have to join metal to metal (Aluminium or SS piece onto a vertical SS wall) that could take a shear load of say, 600gm with an area of contact of around 2cm^2. The environment is above boiling ...
0 votes
0 answers
37 views

How do I find the pitch for the fly press?

To solve the problem first I need to find the pitch of the screw to find the shearing stress, is the stroke 45 degrees per 5.75mm or 90 degrees per 5.75 mm?
0 votes
2 answers
49 views

I am looking to make thread changes to a handpiece for laser hair removal equipment

I am looking to make a design update to the threading of the main body hand piece (piece in which you hold) to the different size standoffs (basically pieces that position the laser beam at different ...
4 votes
2 answers
3k views

How Can You Calculate Force to Overcome Friction From an O-Ring Seal?

I essentially have a piston in a tube that is sealed with an O-Ring and actuated with a solenoid. The friction of the O-Ring however, is higher than estimated (guessed as far as I can tell) by the ...
-1 votes
1 answer
54 views

Which design is most resistant to tipping against 90 degree downward force?

Have a question sort of related to question at (What calculation to find how much force before tipping over?) but with slight modifications. Trying to weld some tubing together and onto a heavier base ...
1 vote
1 answer
321 views

Will high velocity air directed underneath a half-toroid shaped Coanda saucer by a centrifugal impeller create a lifting force?

I would like to know if a lifting force will be created by the Coanda effect from high velocity air that is directed underneath a half-toroid shaped saucer by a centrifugal impeller. I am seeking an ...
0 votes
0 answers
15 views

Single Photon/Electron Emitter

Is it possible to buy single photon/electron emitter in market for experimental purposes? If yes, can you please guide me where and how?
0 votes
1 answer
65 views

Is there any elemental pieces template (blank) which together forms a corrugated box of desired size, or is there anything similar to it?

We run a corrugated box business. I have known elements in chemistry; I was thinking, whether similar to them, there are any elemental corrugated box templates (dieline; keyline) which together form a ...

1
2 3 4 5
11