Questions tagged [design]

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1answer
636 views

What are the basic mechanism, components or parts to generate relative movements?

I'm an engineer in industrial design and despite that I studied mechanics, kinematics and dynamics, I got difficulties when I try to label or find components which could enable my designs have ...
1
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1answer
200 views

Why do microwaves get louder when the timer goes off?

With most microwaves I've used, I've noticed that once the timer goes off, there is a couple seconds where the "microwave sound" gets louder and it seems to be cooking more intensely before it ...
3
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2answers
2k views

Designing the pivot point for a swingarm

I came up with the following design for a single wheel trailer: The shock absorber is missing in this drawing. What is the best way to mount the swingarm to the horizontal plate? It needs to pivot. ...
7
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1answer
2k views

Using a pattern of features as datum BOTH individually and as a group, for different FCFs

The quick: I've come up with a handful of possible options for how to structure the Datum Reference Frames (DRFs) and Feature Control Frames (FCFs) for this part. I've narrowed it down to the two ...
2
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1answer
108 views

Airflow selection mechanism

In a sensor project I'm involved with, we have a requirement to bypass the airflow from one sensor while it does some further measurements. To do this, I implemented a flap driven by a standard servo ...
7
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1answer
1k views

What IPC mechanisms exist for the i.MX 7 (or i.MX 6) multi-core processors?

I'm considering using the i.MX 7 processor for a new design. The overall architecture appears to be similar to the i.MX 6, at least from comparing the block diagrams. What mechanisms exist for ...
1
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1answer
1k views

Finding the diameter of a Triple Thread Worm Gear

For a Board Exam Review: A triple thread worm has a diameter of 3 inches. The wheel has 25 teeth and a pitch diameter of 5 inches. Material for both the worm and the wheel is of phosphor ...
5
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3answers
2k views

Orthographic (engineering) drawing with same top and front view?

I came across this while reading on third angle orthographic projections. The object has the exact same front and top view - both views are trapeziums of exact shape and size (As shown in the image). ...
8
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3answers
126 views

How do I know if I need a pull up or pull down resistor for a GPIO pin?

I've seen many microcontrollers use pull up or pull down resistors either as a setting for GPIO pins or as part of the hardware. How do I know if I need a pull up or pull down resistor for a GPIO ...
2
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0answers
524 views

Band Brake placed Perpendicular to the Diameter bisecting the Angle of Contact

I was asked the question: A band brake is installed on a drum rotating at 250rpm and a diameter of 900mm. The angle of contact is 1.5pi radians and one end of the brake band is fasted to a ...
5
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1answer
2k views

What is the script function to select Solid Body in ANSYS Design Modeler?

I need to select a solid body in ANSYS Design Modeler, with script, in a design with multiples bodies. With the following command I select all the solid bodies, but this is not what I need. ...
3
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2answers
1k views

How to design a swivel connection for a single wheel trailer?

I'm trying to design a single wheel trailer for my underpowered VW, much like this one. Unlike a conventional trailer, it is attached to the car at two points. To prevent the wheel from dragging, it ...
7
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1answer
209 views

Sending out a 12d Civil Design Model

My project team and I delivered the design of a 14ha urban infrastructure development in Sydney for a Client. The project was to hand over the development at a Tender level of design, which would be ...
6
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2answers
4k views

Snap-fit design

I'm designing 2 objects that should be attached to each other and removed when it's necessary. So I though about snap-fit as a solution. There is a lot of types of snap-fit but I'm planing to use a ...
0
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2answers
3k views

Why are so many things around us rectilinear? [closed]

If you look at the man-made objects around you, you will see that almost all of them are either rectangular, or parallel and perpendicular. There are a few circles here and there, but the overwhelming ...
3
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1answer
966 views

Calculating deflection for a home built trailer

I am designing a 4'x12' trailer frame. 8' of it will support weight, the balance will be the tongue. My area of concern is bending at the ends of the long supports. There will be a wheel assembly ...
5
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2answers
2k views

Why does blood pressure cuff size matter?

There are a number of sources that confirm blood pressure cuff size can have a significant impact upon the measured reading. (See 1, 2, 3, 4) The most succinct description I have seen is this: ...
4
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1answer
68 views

Accounting for blank registration within CAD design

How do CAD designers account for the fact that a blank may have to be flipped to a different side in order to allow the piece to be completely milled through a CNC system? For an example, let's use ...
5
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2answers
1k views

Mechanisms for moving dual blackboards

I have to make a dual blackboard like the one here, http://www.ucd.ie/physics/lhcb/contact/blackboard.jpg, My biggest concern is what sort of mechanisms I should use to allow for smooth and easy ...
6
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1answer
29k views

How deep are utilities typically buried?

What are the recommended or relevant standards for US city planning with regards to depth ranges for various utilities such as water, natural gas, and power, as well as for subway or rail, etc...? ...
9
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4answers
762 views

What's a professional way of tracking design history in plant engineering?

If you look at the design documentation in our projects (Biogas and waste-to-energy plants), you find out what we plan to build but not what other options were considered and why they were discarded. ...
6
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1answer
7k views

What drives the honey dipper design?

Honey dippers are often made of wood. Is there a property of honey that drives this? Honey dippers are shaped like ovoids with lateral grooves. Is there something about the viscosity of honey that ...
8
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3answers
924 views

Why raised face for mating parts?

In designing mechanical parts in an assembly, sometimes the mating surfaces are raised faces. I've been told it's to provide a better seal. However, for piping (flanges), it seems to be the consensus ...
12
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2answers
1k views

Why are three way bridges rare?

It's true that most bridges are "two directional." But three way bridges are pretty rare, globally. I can understand why there wouldn't be many for rivers, but if bridges are designed based on the ...

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