Questions tagged [equipment-selection]

Questions about how to choose the correct size, grade, options, etc. for a known piece of equipment, given a well-defined use case.

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Compact way to regulate 3000psi (200bar) down to 30psi (2bar)?

This was originally posted on the Lego page, and closed because it's not actually about Lego itself. I thought I'd give them a chance first, in case someone had done this already and had some ...
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1answer
42 views

Which material index should be maximized for a component in a Car's manual type HVAC?

I was doing a case study on the plastic used in cars for controlling the AC in a manual type system which actually snapped in mine it just rotates according to the knob position in the dashboard, ...
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23 views

Calculating the proper power of a motor

I'm trying to build a filament extruder with some basic available tools and materials. Simply the main principle of the machine is to insert some amount of plastic raw material ( ABS in our Case ) to ...
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1answer
37 views

Type of electric actuator for a music box?

I'm currently thinking about creating a small piano-like (but of course nowhere as big or complicated) music box which can be digitally controlled with a microcontroller. Therefore I need to know ...
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17 views

External Static Pressure on Open Gallery Fan

I routinely work on building designs that incorporate rooftop upblast fans over large industrial spaces such as this one: When selecting these fans, as with every other fan, you need to determine the ...
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1answer
271 views

Understanding a Caterpillar Excavator Recomendation for Increasing Life

I am trying to understand / interpret one recommendation I read on a Caterpillar website for maximizing excavator life: ** Never dig over final drive. ** Can anyone explain what this means? What'...
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1answer
83 views

Type of brazing torch / gas that would be appropriate?

I'm a competent DIYer and have done a little small-scale ferrous and non-ferrous brazing in the past. It was in a professional workshop the equipment was provided suitable on request, so I didn't need ...
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2answers
160 views

What is the opposite of an uninterruptible power supply called?

The question title says it all. I'm looking for the opposite of a UPS, ie it won't turn back on if there is a power outage. I know they exist but, I can't remember what they are called or find them on ...
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44 views

What type of acturator with motor to choice for measurement with step = 0,25 μm?

I need to select some linear acturator or build it. I see it as: On green platform there is pink device. This device must be measured. For this purpose we need to choose linear acturator with ...
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1answer
511 views

How can I find the price of a product if the manufacturer doesn't show it on their website?

I need to buy a particular brand and model of stepper motor and I have found the product on the manufacturer's web catalog, but with no price listed. How can I find the price of device? I tried ...
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3answers
411 views

What's the easiest way to count high speed pulses?

I need to count digital pulses with a width of 30 ns and display the updated count to the user every second. The pulses have already been through a comparator and a pulse shaper. Resolution isn't ...
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1answer
167 views

Transistor choices for switching high speed data communication lines

So here's my situation: I'm a mechanical engineering student working on a product innovation for one of my courses. The product itself is fairly heavy into embedded programming, which I'm comfortable ...
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2answers
710 views

How to evaluate new Vernier calipers?

I am looking to purchase some new Vernier calipers, but I am overwhelmed by the amount of specs which are being offered. I need help in understanding how to evaluate them. I do not want a dial or ...
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1answer
68 views

Identification of Foundry equipment

Good day! We (undergraduates w/o prior foundry experience) inspected a foundry for its health hazards, our problem is we are not permitted to be accompanied by a laboratory assistant, so we don't have ...
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186 views

How to select a low flow rate diesel flow meter

I need to select a precise flow meter for the following application condition: Flow range: 0-150 liter per hour Medium: Diesel There are so many meters on the market that I am a bit lost. How do I ...
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1answer
246 views

How to determine the number of effective anchors in a base plate?

The situation is a steel baseplate that has to be anchored to concrete to resist lateral loads. The lateral load on the base plate is great enough that more than one or two anchor rods are required....