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Effect of high frequency welding near by the electronic things

I have high frequency welding machine. During the welding time, I can see a wave in my lap and computer and also that time stuck my computer.Can you please help to solve this problem?
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1answer
11 views

What is the effect of different ways to adding liquid materials into a mixing tank?

I am working with body wash products and there is a problem happening with the mixing process. I use a 5000-liter tank to mix all the liquid materials including water, surfactant and preservatives. ...
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1answer
9 views

Is it ok for clutch to slip in DCT in certain situations?

When driving a car with manual transmission on start you slowly release the clutch so the car doesn't jerk. So clutch slippage here is not that bad if I understand this correctly? And also couldn't ...
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0answers
5 views

Why does rebar in reinforced pre-stressed conrete reduce in deflection if compressive stress is applied to member?

According to What is Prestressed Concrete? - Practical Engineering, one way to reduce deflection in the steel rebar is to pre-stress the rebar by applying compressive stress in the member before ...
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1answer
29 views

Elution from an Ion Exchange Column

I am using concentrated NaCl(10%) to elute Cobalt (II) ions from a cationic exchange column. How would I determine the volumetric flowrate of regenerant needed to completely elute the cobalt ions from ...
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0answers
3 views

Minor losses in a header

I need to calculate the minor losses in a steam header. I have calculated the major friction losses. But I can't figure out how to find the minor losses since the header has multiple tappings and not ...
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1answer
35 views

Calculating max weight capacity of brushless motor

I am having trouble determining the maximum weight capacity a motor can handle. I provided the specs below. The calculations are for the top row or the 580KV model. So to start off,I'm only taking ...
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1answer
20 views

Why doesn't the flow of current through the conductors in the rotor of a fan affect it?

The rotor of fan is shown as a series of circles arranged in a circular manner. From youtube videos, I came to know that this is sort of a top view and the circles actually represent conductors ...
2
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3answers
383 views

When calculating a force, why do I get different result when I try to calculate via torque vs via sum of forces at an axis?

If I just do it by writing that the sum on y axis is 0 I get $100+x=200$ $x=100$ If I try torque around the top: $x*800=200*500$ $x=125$ So what am I doing wrong?
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1answer
60 views

Coating brass components cheaply

I have seen a number of products made of brass with a silver-looking coating covering the brass on the outside. These products are all quite cheap (for example a small watering can or clothes hooks). ...
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2answers
67 views

Discrete PID controller

I need the equation of a discrete PID controller and I find different answers from different websites. For example, here the answer is: $$u[k] = u[k-1] + (K_p + K_i \frac{T_s}{2} + \frac{K_d}{T_s}) e[...
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1answer
60 views

Why do people build the core of a sandwich structure using composite

Usually I see composite as a laminate wrapped around the core of a sandwich structure. Usually in loading such as bending the bending stress is the highest furthest away from the neutral axis, while ...
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0answers
8 views

Final temperature of an isolated vessel - Thermodynamics

8) Consider an inextensible tank of 10 m3 of volume, isolated by an adiabatic wrap. The tank contains nitrogen at 2 bar and 300 K. This tank is connected to a piping by which more N2 (at 300 K) is ...
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0answers
32 views

Which force effect on the rods in this case?

As it shows in the figure i would like know which the forces will be acts on Rod A and B: Rod A F1 + F2 are only effect on it ? OR F1 + F2 + F3 + F4 of all effect on it ? And same for Rod B Rod B F3 ...
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0answers
16 views

How are (portable) oxygen concentrators made? [on hold]

I'm wondering how machines like the Philips Simply Go™️ and other oxygen compressors are made and how they work. Can someone explain the working of it?
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1answer
44 views

From a mechanical point of view(Physics/Engineering) why are Front-Load washers said to clean/wash better than Top-Load washers on average?

Here is an example Is it just marketing or do they really clean/wash better due to some physical property or the way they work, I am asking how do they if they do? N.B I do not intend to indicate a ...
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1answer
16 views

Wouldn't placing an inductor instead of a capacitor have the same effect in fans?

A capacitor is kept in the circuit of a fan to overcome the trouble of having torques in both directions. I would like to know if the capacitor could be replaced with an inductor without resulting in ...
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1answer
56 views

Singularity function

Could you please tell me why the singularity function is one when x=0 I mean $<0> ^0=1$ Thanks you in advance
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0answers
5 views

How to create RBE2 between the end edges of a cylinder and end nodes of a beam element in ANSYS APDL?

I have a cylinder with shell mesh. on its axis I have a beam with the same length of the cylinder. I want to create an RBE2 between each end edge nodes of the cylinder and the corresponding end node ...
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2answers
2k views

Electrical flowchart in Microsoft Visio : issues

I am trying to recreate in Microsoft Visio a diagram of a photovoltaic power plant that would look like the one below. But I have some issues for doing so, in particular : I don't know how to ...
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1answer
23 views

Why does a tractor not do wheelie with a lot of weight on the trolley?

Tractor carries more than his own weight on its trolley. The linkage between the tractor and the trolley is far away from the tractor. So, the whole weight of the trolley is on the back of the tractor....
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1answer
40 views

Fluid Mechanics - Fluid flow

I have answered the following questions, however I’m unsure if they’re correct. 1.) For this question do we consider gravity force, I have used it but I’m not sure if this invalidates my overal ...
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0answers
9 views

How is the slip calculated in Abaqus small-sliding interaction?

I’m doing research on the sliding of 2 fracture surfaces. To do that, I’m trying to understand the Small-sliding deformable interaction in the Abaqus (2018), and I use the Node-to-surface ...
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2answers
57 views

Why don't we use hot water instead of steam to drive the turbines?

I guess if we do this then, the size of the turbines could become smaller. The condensor's size also might be reduced. But the catch over here is the energy density of hot water is less then that of ...
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1answer
24 views

Beam column joint reinforcement

Why cant we provide the bars cross bent in the beam column joint...as the cracks are all diagonal...so inorder to avoid cracks why cant we provide the bars crossed in the joint instead of providing ...
0
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1answer
44 views

What are fluids or “goos” called, that increase friction?

I have a shaft inside a bushing, the shaft has a gear on one end that is supposed to provide resistance to other gears it is driven with. I'm having a hard time finding the correct term for the sort ...
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1answer
12 views

Proper Flow Meter Installation

I have a 12" flow meter that uses a float on a stem and whenever gas is supplied, the initial flow spikes the float to the top and gets wedged. The flow meter is plumbed downstream of a control valve ...
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1answer
14 views

reinforce section of 6x12 header

I need to remove 5" x 48" of the middle of a 6"x12"x16' header so I can clear the AC units on the top of my motorhome entering the carport. The header supports a 6/12 pitch roof with trusses. What ...
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1answer
58 views

Can we build a building that could last thousands of years, if it was abandoned, in a humid continental climate? [on hold]

Can we build a building that could last thousands of years, if it was abandoned, in a humid continental climate? Is this even possible with present knowledge? How would such a structure be built? ...
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1answer
19 views

Swiss File #4 Alternatives

I want to buy a "Swiss File #4". I visited some local stores but noone knew what that was. I found this nice set of files. Can someone read what it says in the top? Is some of these file equivalent ...
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2answers
54 views

Loadcell / strain gauge sizing for a joist

I am looking to use some load cells (foil based type) to detect presence for home automation within in a room. I was looking to mount some loadcells to the joists for the floor (UK Based house so ...
3
votes
1answer
302 views

Iris mechanism nomenclature - need help to enable better search results

I'm researching iris mechanisms with the goal of building a functioning, weather-sealed door. I am learning much as I go along, but am faced with a challenge in nomenclature (I am not an engineer). I ...
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2answers
280 views

How to design a rotating base?

I have no formal training or professional experience as a mechanical engineer. I would like to design a rotating base that is powered by a motor. I would like to accomplish the following: Smooth, ...
0
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1answer
35 views

How deep do you have to check for problems underneath a building site?

When you're putting up a new building, you have to check the soil underneath for stability. How deep do you typically have to check? What's the extent of your "due diligence" when ensuring that a ...
0
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2answers
19 views

Is learning VLSI design useful for a control/automation engineer?

I've known of a few universities that include a class about VLSI design as a part of their control/automation engineering programs. I undestand VLSI design to be about creating integrated circuits ...
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1answer
26 views

Stone vs. Stainless Steel - Weather Resistance [on hold]

Under normal atmospheric conditions in a temperate zone with hot summers and snowy winters, would stainless steel or a quality masonry stone last longer? (of course both would last long)
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3answers
78 views

What happened to the projectile in Hypervelocity Impact tests?

I recently saw a tweet about Hypervelocity Impact Sample and someone ask how is it possible to shoot a projectile at that speed and what happened to the used projectile when hitting the shield. I ...
2
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1answer
146 views

Physics motion simulator for flying object

I want to see how different combination/position of fan on airplane affect stability of airplane. I need simulator to test one of the idea which involves specific position for propeller on the plane....
1
vote
1answer
59 views

Trouble with Valveless PulseJet

My friend and I are working on building a valveless pulsejet out of sheet metal. We initially built a small one (a few feet in length) using the below dimensions: The issue was that we were unable to ...
2
votes
4answers
74 views

Wind turbines with down tower power units. Why aren't they more common?

Concerning the big megawatt wind turbines, if there is such a big trouble with gearbox bearings failing much earlier than expected and costly maintanence or replacement of huge gearboxes, what is ...
9
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1answer
467 views

Differences between 2D hydrological modelling programs eg. HECRAS 5.0 (2D), TUFLOW, MIKE Flood

Just wondering what the difference is between 2D flood modelling programs. I am primarily considering whether HECRAS 5.0 (2D - currently in Beta) would be an acceptable alternative for simple 2D flood ...
0
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1answer
44 views

How to calculate total force of 4 hydraulic power jacks?

The area of the 4 power jacks is known and also the pressure is measured and thus known using pressure gauges on pipe from the hydraulic power pack to the jacks. The jacks are identical and each of ...
0
votes
1answer
16 views

How to design a magnet to handle a known force?

There is a metallical structure. I can estimate how much steel are in it. I would like to know how tall/strong a magnet should be to maintain a certain object to the metallical structure. The object ...
2
votes
2answers
78 views

In what cases are the roughness values Rt and Ra used?

Roughness measurement instruments output those two values, where Rt is the distance between the top of the highest peak and the bottom of the lowest valley, and Ra is the average distance of every ...
0
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0answers
15 views

long threaded couplers

So if i have the first one usually you couple two rods or hang a long rod from something. But if i go to the next one i can actually use the coupler as a nut.. But when i use the next size up as a ...
0
votes
1answer
24 views

identify shackle or swivel tensioner mechanism

What is this called? I would say it is a shackle or I suppose, a turnbuckle, but it appears to have a right threaded rod on both sides and right threaded free nuts inside. I would just say it's a ...
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0answers
14 views

What topics in control theory should I learn after classical control theory?

I've finished my controls system course at college, and I've learned all about classic control theory (root locus, PID, design via frequency response, etc.). Throughout the course, several more ...
3
votes
1answer
102 views

Should one use multiple elements through the thickness with multiple materials?

To get realistic results from a FEM calculation, it is common (or so I've been taught by someone who may not be up to date) to use at least four or five elements through the thickness of a beam or ...
0
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0answers
12 views

Formula natural frequency double wall

I started with a book (pdf see here: https://www.pdhonline.com/courses/m104/m104_new.htm) In this book there is the following formulla found $$f_0 = 170 / \sqrt{M_1 * t / (1 + M_1 / M_2)}$$. The ...
0
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1answer
59 views

Solar panel actuator control

I'm looking to design a system that can control a solar panel through an electrical actuator for a range of motion of -45 to +45 degrees for maximum solar exposure. The panel will be mounted on a 10 ...

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