# Tag Info

## Hot answers tagged prototyping

10

3D printing bores/holes is inherently and wildly inaccurate. You can continuously tweak the model, material, and print configurations to get better results, but for best results, in my experience, redraw the hole to a slightly smaller size than your target and reprint. Then, after printing, use a drill to get the size and geometry more precise. For your ...

5

This is actually two different questions. Mechanisms to convert linear motion to rotational: There are different mechanisms around, the most common of all crankshafts. what is the best mechanism for your problem, coupling the opening of the door to the sliding of the can. I don't think you can use a rack-pinion mechanism unless you have pinion with big ...

5

Instead of a shaft driven rotary encoder, you might be able to build an optical encoder that uses optical sensors to read a pattern printed on a disk. A simple encoder uses white/black alternating sectors so it can only tell you the speed of the disk, not the direction or position: Image credit: heliosoph - Make your own rotary encoder More complex ...

3

I would call it a splined crank (i.e. a crank/handle that has a splined socket on one end -- like on some higher-end bicycle cranks). In your case, it seems that you want to place the splined end of your crank/handle onto the spur gear that is mounted on the stepper motor shaft. Another application of such a lever is a handle that is used on a water valve (...

3

In my experience (your mileage may vary) these are the sorts of processes and terms used in product development: The breadboard is your proof-of-concept work; can be messy, often by taking something that's existing and adding/subtracting/hacking/cutting/jumpering/bludgeoning it into something to validate your idea Prototypes are your pre-production products ...

3

You have already arrived at half of the simplest solution. You need a dual tension system. When you open the door, the string pulls the slide out. When you close the door, you simply need something to pull it back. That something can be a spring mounted to the back of the slide and the back of the cabinet. It needs to be sized in length and spring ...

3

Just prior to this point in the video you can see that the display has been inserted from the front and this portion will be added from the back and screwed in. All that is required is to ensure that there is enough space between the two parts for the bezel flange not to be nipped. Many plastics have a low coefficient of friction with steel or nickel plating....

2

A small plastic rack and pinion will work well and eliminate the need for strings. The rack will be on the drawer slider while the pinion at the hinge of the door.

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EDIT - I've solved this issue after a bit of searching for similar application requirements, so I'll post my solution: Applying a bit of heat using a heat gun to sand-filled PVC pipe allowed me to slowly bend the pipe into my desired shape. The sand prevents the PVC from collapsing inward as it is bent.

2

It's still a prototype, but its a prototype for a different purpose. People use different languages to refer to this. Personally, I call it "iterative prototyping". Others might call it moving from a "works like" prototype to a "looks like/works like" prototype, e.g., http://umaine.edu/amc/2013/08/07/what-is-a-prototype Regardless of what you call it, ...

2

Coffee (stirring) sticks might work. After potting is complete these could be inserted vertically with the narrow edge against the side of the pot in multiple positions around the edge. Seeing as your pots are conical at the bottom you may insert one stick vertically down to the start of the cone and another one on the other side at an angle to form a ...

2

This probably belongs in Software Recommendations and perhaps an agreeable moderator will make the migration. Fusion 360 is a good choice. It uses sketch modeling and also sculpting to create both engineering type models and organic ones. Fusion 360 can export/save in various industry-recognized formats, providing for forward use of your creations. As with ...

2

Without a sketch your setup is difficult to visualise. A typical industrial solution would be to use an inductive proximity switch. These are non-contact, fast switching, water-proof, etc. Figure 1. A selection of inductive proximity switches. You seem to suggest that the switch and circuit will rotate. This means that you need to consider those forces ...

2

There are 3D printers that are meant for quick prototyping of injection molds. They print the molding parts, and remove most of the cost of machining the mold. They arent suitable for mass manufacturing since the resulting mold wont last for very long, but is good enough for a small production runs. Now if you dont have access to something like this. Then ...

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When I worked at an (in theory) ISO shop, we did the same thing as the OP, and in-development designs were uncontrolled and informally and inconsistently versioned. A recent question here (talking about docs rather than parts) had an answer that described formally keeping distinct Rev and Draft codes. Many people including me do this informally anyway, like ...

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If you search on the internet on swivel joint for the rotating joint and under screwdriver joints for the fixed joint you will find manny examples.

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For 3d modelling there a few out there. For entry level professional 3d design and modelling, the software I am mostly familiar with are: Solidworks: Its my preferred one due to User Interface (mind you all of the are similar). It was purchased by Dassault Systems. Creo PTC: Started out as PRO-engineer then at some point purchased by PTC. Apparently is very ...

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Ok, so completely not the best image, but if you have the shaft with a hardened pin fitted - the angular width of the slot can be adjusted to control the angle of rotation and it only needs to match the width of the pin...

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Option 1: A plain old ordinary motor with a clutch of some sort that is completely non-contact when it is disengaged. If losses when you're spinning the thing up don't matter too much, then a rubber drive wheel on a motor that engages the outside circumference of your object (or a wheel on the axle on top) would work. Option 2: DC motor have "excess" ...

1

Yes and no, maybe. Computer fans are specialized, cheap brushless motors, with their own built-in controllers. The ones that I took apart 30 years ago had 4-pole coil assemblies and an unknown number of poles in the magnets, and a 3-transistor circuit that actually made the rotation happen. You should be able to convert one to a galvonometer by ...

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You looking for an element in a ball table. Search for ball table conveyor A castor is almost the same, but cheaper.

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Usually spring's geometry is denoted as : OD* ID* Length. Outside diameter* Inside diameter* Length.

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Let's assume that you will work out the right combinations of dimensionless terms on your own. Let's consider only the question of what to plot once you have those terms. By example, in heat transfer, the Nusselt number $Nu$ is for forced convection is a function of the Reynolds number $Re$ and the Prandtl number $Pr$. In this case we can make one of two ...

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It's going to be an uphill battle from that point on. While you can get every part of the machine and the process to tighter tolerances, their errors may compound to the sort of tolerance of 0.025; you may manufacture relatively simple parts with lower error but whether you succeed or not is more up to luck than your efforts - whether the tolerances of the ...

1

Attach some L-shaped metal sheets or plastic parts in between holes? Attaching can be accomplished by, gluing, nailing, silicone, screwing, etc. depending on the size of the plates and your pots. Or use straws to extend the roots radially/downwards a bit more. Cutting any circling root is another method that I’ve seen being employed by bonsai hobbyists. ...

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As Mahendra Gunawardena said, there's not one universally used method of pricing manufacturing projects, but there are some pretty common facts that result from the economics of the situation. Firstly, if you're talking about small runs at a large company and the design doesn't include anything exotic, the pricing will probably have less to do with the ...

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A laser would be the best method followed by repetitive razor slicing in ever deeper cuts to avoid frictional deformation. Another method would be cold cuts by freezing the silicone and using a regular mechanical saw. The key to doing it properly is removing deformation from the property of silicone when pressure is applied.

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In addition to 80/20 you could use "unistrut" or "channel strut" framing which may be more readily available at a big box store.

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What you're looking for is described as "Perforated", So a quick google for "Perforated Square Tubing Steel" produced: https://www.discountsteel.com/items/Galvanized_Steel_Perforated_Square_Tube.cfm "80-20" is a brand name, and the product that @Donald Gibson was referring to can more generally be found called "T Slot Extrusion"

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Try 80-20 structural tubing. It is available is various sectional sizes, often used for robotics and machine framing.

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