Questions tagged [torque]
The torque tag has no usage guidance.
175
questions
-1
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1answer
41 views
Torque needed to draw back 220Lb's of weight?
I have a crossbow with a 220lb draw pull. I am designing a mechanism to draw the string back 12" as quickly as possible using a 1/2" ball lead screw connected to a 12 to 24v DC high torque motor and ...
3
votes
2answers
39 views
torque required to lift an object
I have a mechanical engineering question that I can seem to figure out.
Basically I have an object this is being pulled down by two forces. Each force is 10N in the downward direction. There is a nut ...
2
votes
1answer
38 views
Modeling the torque of a real motor
I am trying to control a real inverted pendulum by means of a DC motor, for this I must model the torque of the motor, the work I've done in this direction is the following (which I believe is right):
...
1
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1answer
27 views
Required torque of climbing tracked vehicle
Currently I'm designing a tracked vehicle for a school project. It has to carry a weight and be able to overcome some obstacles which are about 3/4th the height of the tank. What I'm stuck at, is ...
1
vote
1answer
48 views
Running a well pump rated for 230V on 208V power
I have a well with a 1.5 HP pump. The pump is rated for 240V input. At the moment, the only nearby available power is 4-wire 208Y 3phase. I am considering connecting two of the three phases to the ...
6
votes
3answers
314 views
Three-phase versus single-phase operation of a generator
My generator (a Fermont MEP-803A, 4 cyl diesel, 10kW rated) can run in three distinct modes:
Single-phase 120V, in which one terminal is hot, and another is neutral
Single-phase 120V/240V, in which ...
3
votes
2answers
47 views
Linear actuator behind lifting boom
This is a follow-up on my previous question here:
Sizing a motor for a floor jack-like mechanism
The floor jack setup is clearly inefficient when it comes to electric actuators. Something similar to ...
1
vote
1answer
54 views
Sizing a motor for a floor jack-like mechanism
I've been trying, as a thought exercise, to run some calculations on a floor jack-like mechanism that is expected to lift 130kg (287 lbs). Dimensions and setup are as per the image below.
The 130kg ...
2
votes
1answer
37 views
Lifting a Mass with one or multiple motors
I’m working on a DIY project and need some assistance. I have a single motor that can lift a load of 500 pounds.
Is it possible to use 4 smaller motors to lift the same load as long as the 4 smaller ...
1
vote
0answers
15 views
how do you calculate viscocity from torque arm load cell measurements?
I have a piece of company developed equipment that uses a pot mounted on a rotating base plate with a 0.15m torque arm and load cell, a mixing paddle is used to stir the mixture while the controller ...
1
vote
3answers
65 views
How to calculate the torque created by a rotating motor?
I have watched this video where the speaker explained how the vertical spin of a quadcopter is stabilized, and how it could be unstabilized to make the drone rotate.
Here is a screenshot of the video,...
2
votes
1answer
45 views
Torque between concentric gears
First time asking question here.
I'm not a mechanical engineer!
I have a simple question that I can't explain the answer to it.
I have a double gear (2 concentric gears with different radius) and I ...
0
votes
1answer
19 views
Formula for finding the optimal weight for a given torque and vice versa
Whenever i see videos of two trucks pitting with each other to see who has a stronger, i always see comments that sounds like:
If you load the other truck more it would beat the other one
That truck ...
3
votes
1answer
40 views
Determining the required specs of Stepper Motor
Being a non-engineering type, I'm trying to calculate what power and torque I would need from a DC stepper motor to execute a particular task. I'm certain that my question will open me up to ...
1
vote
1answer
34 views
How to select the correct Bolt/screw Torque for sealing?
My coworkers and I are finally testing our agriculture sensor on the field. As you can imagine, the moisture and dust are important variables to keep aside from the electronics inside our product. ...
0
votes
2answers
32 views
Sizing an AC Servo Motor for lifting pallets
I am trying to size a servo motor and my basic physics and math is so rusted that I can't figure out how to go about it?
The scenario is as follows:
I need to lift an object in the vertical direction ...
1
vote
1answer
72 views
Driving Gearbox in Reverse
https://www.maxongroup.com/maxon/view/product/251601
https://www.maxongroup.com/maxon/view/product/gear/spur/gs45/301171
Consider that this motor-gearbox combination is backdriven so that the motor ...
0
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0answers
19 views
Circling Morh's Circle (question on tensile stresses)
If I have a mechanical part subjected to a unkown torisional force with the specification that tensile stress should not exceed 150 MPA, how would I form the Morh's circle.
I know that I have (150 ...
1
vote
1answer
39 views
What criteria must apply for torsional effects on this beam to be ignored in calcs?
I'm interested in how to work out whether torsional effects can be ignored or not, in calculating the adequacy of a given steel beam in the following idealised eccentric scenario.
Or, equivalently, ...
1
vote
2answers
52 views
Why torsional warping does not occur for shafts with circular symmetry?
When we twist a shaft/beam/rod, shearing stresses are produced. The angle by which the end of the shaft rotates can be found as:
$${\displaystyle \theta ={\frac {TL}{GJ}}}$$
where $T$ is torque, $L$ ...
2
votes
0answers
71 views
how to calculate required torque and rpm to through a 160 gram cricket ball horizontally at 160km/h velocity?
I am going to design a bowling machine. In this design, I'm going to use two motors that are being placed vertically and their shaft are attached with two horizontal identical wheels with a space of ...
1
vote
1answer
39 views
Help me build a mechanical gizmo involving a pulley (I think)
Electrical engineer here. I'm looking to build an incredibly simple mechanism that in my mind involves kind of a pulley. Below is a diagram.
So it's essentially like a mechanical servo. I would like ...
0
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0answers
21 views
What is the top limit for torque per diameter ratio for electrical rotation mechanism working in a tube?
Use case: industrial stop valve placed in an another pipe welded perpendicularly making a T-shape.
To make the question more specific let's consider 50mm inner diameter pipe for the linear actuator ...
0
votes
2answers
49 views
Measuring shaft torque of a small motor
I would like to determine the mechanical output torque and power of a small motor without using expensive strain guages and similar and have come up with the idea of determining the maximum mass that ...
0
votes
1answer
72 views
How can I calculate the power and torque required for the motor on a wheeled robot/vehicle?
How can I calculate the power and torque required for the motor on a wheeled robot or vehicle if a particular acceleration or movement up an incline is required?
0
votes
1answer
35 views
Max torque given in engine specification is indicated torque or brake torque?
I want to calculate brake torque from indicated torque for motorcycle.
0
votes
1answer
24 views
doubling the existent two brackets - will it help with my grape press?
Here is how the top of my grape press twists as I pull the car jack downwards (marked blue). I was wondering if adding another bracket (marked purple) on each side would solve the twist issue. Thanks!
...
1
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2answers
48 views
A few questions about cars
When I start the car, why do I hear the engine working when I'm not pressing the gas pedal?
How exactly does the torque and power of the gears work?
Torque = Radius * Force
Power = Torque * Speed
...
0
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0answers
35 views
How to determine if my stepper motor will rotate this shaft
I have a stepper motor with the following characteristics:
- Holding Torque: 40 N* cm
- rotor inertia: 54 g*cm2
- drive torque 2.2 N * cm
This is the system:
the shaft is HDPE, and the ...
0
votes
2answers
53 views
When does torque applied on a shaft produce bending and when does it not?
In both cases in the picture above torque is applied to the shaft, however in the first case the force $F_{c}$ also produces bending across the shaft. So my question is, how do I know if a torque ...
0
votes
1answer
63 views
Calculating needed motor to spin a disk at low RPM
I'm designing a machine that I need to spin a horizontal disk at low RPM using a motor and gearbox. I'm not good at physics so I need help to find a motor/gearbox to fulfill my needs.
It's a ...
1
vote
3answers
37 views
How to accumulate torque of multiple independent gears?
I did not find any answers to this simple problem across the web, maybe seeking help in this forum helps:
As an example, let's assume we have multiple windmills, each of them producing torque, but ...
0
votes
1answer
29 views
Could stepper motor lose torque because of overheating?
I have a stepper motor on a 3D printer that heats up very bad because of the heated extruder (it is actually controlling the extruder). When this system starts, it works fine at the beginning, while ...
3
votes
2answers
98 views
Reduction System for Gate-opener motor
I've been studying this topic for a couple of days now. I started by asking some questions regarding output Torque and gear ratios relations.
Now I came with the whole picture and some calculations ...
0
votes
2answers
40 views
How to calculate traction force w.r.t. rotational speed of a shaft mounted at a certain angle on a surface?
I am designing a new mobile robot platform and i need a generic solution for the robot in order to establish a proper mathematical modeling. My question is about calculation of the traction force of ...
0
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0answers
23 views
Gear ratio comparisson
I have been studying about Torque and gear ration in another discussion Torque and RPM calc, and I received good answers that make me go in-depth into this topic. To understand it better, I want to ...
0
votes
1answer
43 views
Measuring Torque in a bicycle [closed]
How to measure torque in a bicycle?
how much newtons will produce by the pedal of the cycle ?
1
vote
2answers
47 views
Parallel Axis Theorem for x and y Shift
I have a quick question about the parallel axis theorem.
Let's say I have a box-like object rotated about the following pivot point
I was wondering, by applying the parallel axis theorem, would the ...
0
votes
1answer
58 views
off-scale torque measured - what is my torque arm?
I have assembled a benchtop torque measurement stand for evaluating electric motor and controller efficiency.
The motor is 49kV , 5kW brushless outrunner.
Input power reading is taken from motor ...
1
vote
2answers
703 views
Calculating the torque required by an Archimedes screw pump
Given an Archimedes screw pump (shown below) how would you go about calculating the torque required to operate it? I'm assuming a situation where you have to design for a given flow rate, Q (m^3/s) ...
4
votes
0answers
43 views
Equation for the spring constant of an orthotropic, rectangular wire spring
I hope I can get some help with this problem as I've been struggling with it for a long time. I have a helical tension spring with radius $R$ and a square wire cross section and made of orthotropic ...
1
vote
0answers
21 views
Torque required to move the skid steer robot
I have a 4 wheel skid steer robot. My motor can deliver up to 6 Nm with a gearbox efficiency of 70% up to 170 rpm. I want to find out whether I will be able to make a pivot turn and move.
So I ...
-1
votes
1answer
43 views
understanding required torque for a servo
Good morning. I have been reading the threads about "Understanding required torque for a motor lifting a weight" in hopes it would apply to my situation. I would like to utilize an R/C servo to rotate ...
0
votes
0answers
310 views
Mean diameter of the collar when calculating the raising torque
TL;DR
Is it possible to calculate the mean diameter of a collar?
Can I ignore the collar's component when calculating the raising torque?
I have been trying to answer this question, Z axis: Stepper ...
-1
votes
2answers
185 views
Motor torque calculation, about the units
This link shows a motor torque, power, and speed relationship, as shown below:
With regards to its units, how does kW and RPM become equivalent to N.m?
0
votes
0answers
30 views
Jam nut holding torque
I've got a leadscrew that has an M5-threaded hole on the end. The original purpose of this hole is to accept a screw with a slightly-oversized washer, which prevents the "nut" (don't know the proper ...
0
votes
1answer
367 views
How much torque do I need to lift 1,000 pounds?
So, I have a 1,000 pounds load.
What would be the required torque in inch/pounds to lift that load for a motor?
If the motor is installed at the center of the radius generating that torque, does it ...
0
votes
2answers
37 views
Would some manufacturing processes be more efficient if driven differentially by a single motor, up to ~150 kW, than multiple lower-rated motors?
I'm writing a discussion paper on the potential energy efficiency benefits of integrating different manufacturing processes by co-location on the same site. One possible field for integration is in ...
0
votes
1answer
112 views
The torque I need to lift the device and correct gear ratio for the device to be as fast as possible
The device have to climb a pipe vertically. I have a DC motor with power rating 21.2 w, output speed 13360 rpm and maximum output torque 154.4 gcm.
My device is 1 kg and I have wheel with 0.012 m ...
0
votes
2answers
158 views
Calculating proper specs of DC motor for rig driven on the rope
I'm trying to build a cablecam, a picture that serves only for illustration is:
The DC motor is
48V
5000W
6000rpm
6000 oz-in stall torque
85% effiencity
0.066 Ohms Resistance
135Kv (RPM / Volt)
...
