Recent content by Bandit127

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    Impact of Atmospheric Pressure on the Water in a Tank and a Pipe

    The pressure at the bottom of the empty tube is greater than atmospheric pressure, by about 7 arrows. (Atmospheric pressure can be ignored because it is bearing on both the water in the tank and the water in the tube). The additional pressure in the tube will push water up the tube and as the...
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    Tube amplification vs solid state

    I am also a guitarist and have built a few valve amps. In addition to the even order harmonics that Alan stated earlier, tube power amp sections tend to compress the volume of the signal when they are working at higher levels (being pushed). This is desirable for a lot of guitarists and makes...
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    How Can a Junior Mechanical Engineer Excel in a New Plastic Molding Industry?

    Yield is a way to describe in-process waste that provides a simple number that production management can understand. It is the number of good parts divided by the number of starts, in percent. In your case the number of starts could be the shot count on the moulder or the number of preforms...
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    How Can Closed Loop Drive Systems Achieve Precise 1000 mm Movements?

    The error due to latency in the closed loop while the drive is in motion is called the "following error". (You may find those words help in your search for information). In my experience, PID control of position is commonly implemented and should help the drive stop accurately at the...
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    Pull Up resistor in the Voltage?

    Many moons ago I was part of a project where the objective was to build a digital audio preamp. There were 3 of us and we didn't specify what logic family we were going to work with. They used TTL for the power supply and audio processing and I used CMOS for the front panel functions (input...
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    Bench test AC transformer from stereo tube equipment

    I had a similar experience with a guitar amp build recently and I can confirm that the voltage does drop to "normal" with the tubes installed and working. Can you post back and let us know how it went?
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    Do you have to be good at hand-drawing for civil engineering?

    Sketching is a skill worth developing, even if sufficient to create one on the "back of an envelope". I find it very useful for jotting my thoughts down and for communicating ideas and concepts to others quickly and simply.
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    Automotive Designing a Poka-Yoke for Flat Marks on Rocker Arm Bearing

    Another vision system is also my guess for detecting the flats. But you are the engineer in there. Characterise the symptom. How wide? How deep? Can you see it by eye? Can you see it by camera? Is it one part randomly? Is it a bunch of parts in a row? You can't ask yourself, let alone us...
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    Understanding Voltage Between Hot and Ground in Electrical Connections

    I think he means... Using an old fashioned neon testing screwdriver the bulb lights up when it is applied to a voltage (e.g. 240V AC). My finger on the other end of the screwdriver is not (apparently) connected to ground when I am standing on a wooden floor. So how come the bulb lights up?
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    Engineering The relationship of a mechanical engineer with electricity

    A mechanical engineer with an appreciation of electrical and electronics engineering will be able to find the electrical or electronics engineer who knows what the mechanical engineer doesn't know. The mechanical engineer will also be able to accurately communicate the job in hand. The job then...
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    Spacing between Electrical Sockets

    The "book" I think you are asking about is the 17th Edition of the IET Wiring Regulations. https://en.wikipedia.org/wiki/BS_7671
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    Material selection for food grade application

    We use a lot of 316 for salty process water. Racks, tanks etc. We make medical devices so similar requirements exist. Standard 316 is OK for machined parts but we use 316L if it is going to be welded. 316L has a lower carbon content.
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    Where Can I Find an Affordable One-Way Rotation Mechanism?

    A one way roller clutch would have less friction and noise in the drive direction than a ratchet. In the reverse direction they lock up within a few degrees and can hold a good amount of torque. They will also be cheap...
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    Why is there only one set of blades per wind turbine?

    I only discovered this the other day, but the load on a wind turbine is far from consistent. Wind contains gusts, eddies and probably other turbulences with a wide range of frequencies. The guy I was talking to was describing a project to dynamically adjust the pitch of the blades to reduce...
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    Automotive Engine Torque Control: A Guide to Automatics & DCTs

    Engine torque in this context is likely to be secondary to requested rpm. The engine control will be matching rpm to the gear that has been selected to reduce stress on the gearbox and undesirable jerkiness for passengers.
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