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Can you get quality welds from a multiple metal wire feed welder, or do you need separate units for steel and aluminum?
The job site requires welding both aluminum and steel (each to themselves only) for different areas of the project. The contractor has a dual purpose wire feed welder (aluminum and steel) but I am unsure that a dual purpose welder will be optimal…
James Jenkins
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How can I make a rudimentary sunspotter?
This is similar to my Physics.SE question Microtops sunphotometer sun target optics - there I was asking about the optics principles (the answer is no good for my understanding, but I have been able to figure it out myself).
The purpose behind a…
user52
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Why caster angle causes wheels to self-center?
I have no background in Mechanical Engineering.
It's intuitive to use an analogy as this guy demonstrated here @3:48 where he used caster wheels you would see in office chairs where the contact point is ahead of the wheel in relation to the…
supertonsky
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What happens to generated electricity if it is not used?
Let's take for example hydroelectricity produced at a dam and not consumed by any household or industry... Will the electricity need to be stored? What will happen if it is not stored? Does it flow like water and get wasted back to the earth? What…
Nagendra
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Why does the author assume the temperature to remain constant, in this case, along the axial direction?
This is in regards to steady heat conduction taking place in a pipe.
Within the pipe a hot fluid flows and heat transfer first takes place via convection to the pipe and then via conduction within the pipe and then finally via convection from the…
Harshit Rajput
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Why can't screws be used for locating parts?
I remember hearing awhile back that it's not a good idea to use screws to locate/align parts. Why is that? Apparently dowel pins, or "locating pins" should be used instead. From my understanding, I suppose it is because there are much tighter…
TwoWaySpeedOfLight
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DIY BLDC ESC problem is causing MOSFETS and motor to get very hot very fast, HELP
Hey everyone this is my first time reaching out to the community for help to see if someone can show me what I'm not seeing on this. Basically I am trying to make my own ESC for a BLDC and before anyone says the commercial solution is cheaper and…
Harry_CL
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5
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6 answers
Mechanical mechanism that regulates gear's rotational velocity
Please do note that I am a civil engineer not a mechanical engineer.
I have a gear that rotates at a speed that varies with time. Usually, it rotates at speeds higher than the desired speed. Is there a mechanical mechanism that can regulate the…
Abdulsalam_Musaad
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In vibration study, should the reference be necessarily the mean/equilibrium position?
When we determine the natural frequency of free vibration for a system, we start of by defining a reference from where displacements will be measured. I have usually seen in books, taking the reference corresponding to the equilibrium position of…
Harshit Rajput
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Name of spring actuated component
I need to get another component like this but I can't seem to find any manufacturers / retailers.
To describe it:
It is spring mounted on a shaft and retained by bushing on the top and an enlarged shaft diameter bottom. E-clip on top is for…
Eduards
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1 answer
Alcohol as a working fluid?
Alcohols with their lower boiling point and overall non-toxicity, could they be used as a turbine working fluid instead of steam water?
LazyReader
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Is it feasible to build a pedal-powered air conditioning booth?
Imagine it's hot and humid outside. You see a pedal-powered air conditioning booth. You get in the booth, close the door, and start pedaling.
The pedals are connected to a shaft-driven (automotive-style) air conditioning compressor via chain and…
Chris Martin
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Why does this thing that is not a screw have a screwdriver slot?
I am (partially) disassembling an old sewing machine to clean it up.
While removing the bobbin winder, I found this thing that has a screwdriver slot, but it isn't a screw.
This is the part:
It came out of here:
It is actually held in place by a…
JRE
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Is there a way to estimate whether the driver or co-driver picks up the smartphone?
First of all, as I am new in this very corner of stack exchange please help me by selecting the correct tags!
I'm interested in finding an alorithm, that estimates wether a phone is picked up from the center console by a driver or by his co-driver.…
Dennis Heinig
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How many units of HB are used for steel bridges?
Bridges in the UK can be assessed (to standard BA34/90) using an HB vehicle (to standard BD37/01). The HB vehicle is 16 wheel loads, each of 2.5kN times "units".
For concrete bridges the number of units is normally defined as 45 units at Ultimate…
AndyT
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