9
votes
Does a motor suffer damage when resistance to the intended motion is met?
The answer depends on the specific type of motor you intend to use, but in general: when a motor is loaded down, it draws more current, which means its windings get hotter at the same time that the ...
- 14.3k
8
votes
Accepted
What filter is this?
It might be written that way because the transfer function of a second order system is written as:
$$
h(s) = \frac{\omega_n^2}{s^2 + 2\zeta \omega_n s + \omega_n^2}
$$
where $\zeta$ is the relative ...
- 596
6
votes
Does a motor suffer damage when resistance to the intended motion is met?
It depends on the specific type of motor, as @nielsnelson mentions, but it also depends on what you use to drive the motor.
In general, a motor that's designed to run continuously isn't going to take ...
- 2,472
5
votes
How to convert a DC motor into a servo motor using a rotary encoder and a microcontroller?
At the very high level you will need
24V Power supply or a method to generate 24V
24V Motor controller
Microcontroller - Arduino is a good place to start
There are also prebuild motor controllers ...
- 7,125
5
votes
Two 3/4HP / 500W motors to run in opposite directions, at precisely the same RPM, controllable from zero to 5000 RPM?
Connect them with gears and they will run at the same speed - any sensor / control will have an accuracy range
- 15.5k
4
votes
Accepted
Calculating force transferred from pinion gear to rack
The linear force of the rack is equal to the tangential force on your pinion teeth (less power lost due to friction, typically 2-3% for spur tooth and racks). Tangential force = torque/(pitch diameter/...
- 2,347
4
votes
Accepted
Quick release for spring-loaded rod
The force which is needed to pull the pin out, will depend on the friction of the pin and the neighbouring material, and the surface at which the friction works. Let's assume a friction factor $\mu$ ...
- 1,174
4
votes
Accepted
What is a 10 turn potentiometer
it's not unusual to find a single turn potentiomenter (aka pot) that provides a change in resistance over the range of the turning component. The benefit of a single turn pot is that you can get a ...
- 6,940
3
votes
Accepted
How to I design a planetary gear with a gear ratio of 2:1 ( doubling the torque)
(Image from Wikipedia)
When designing planetary gears, there are three different types of gear present to be designed:
Annulus gear, an internal gear surrounding the other gears (shown above in red)
...
- 1,317
3
votes
Accepted
Why servomotor has such low torque compared with stepper motors?
Operating principle is different. In essence if you buy just a motor it will be just that. You can now add gearing that will reduce speed and increase torque. Since torque is directly proportional to ...
- 3,597
3
votes
How to calculate the moment of inertia of a propeller
Assuming you already know basic moment of inertia calculations (and if you do not then you really should not be asking your question here prior to research):
You can't develop an equation without ...
- 5,237
3
votes
Accepted
How to calculate the moment of inertia of a propeller
In order to calculate the mass moment of inertia accurately your best bet is using the functions of a CAD system (solidworks, inventor, onshape etc).
If all you want is an an approximation and you can ...
- 24.3k
3
votes
Torque for servos of tiltrotors
If we ignore the effects of changing the angle of the rotor causing changes in lift and as a starter point to give us a basic idea of how to rotate the axis of the tilt-rotor.
Let's assume your rotor ...
- 22.1k
2
votes
Wire type for robotic tendon?
I have successfully used a non-stretch polymer known by various names such as Dyneema, GelSpun or Spectra for a similar purpose. It is easily purchased from most fishing supply stores.
The material ...
- 1,076
2
votes
Accepted
Improving ball feeder design
The simplest idea for me would be to add on the bottom (and the top cover) small inserts of the following shape (dimensions will vary depending on the size of the ball, etc)
They would guide the ball ...
- 24.3k
2
votes
Does the strength of a servo motor depend on the motor or the power?
I think when you refer to 'servo motor' you mean an ordinary radio-control-model sort of servo:
The reference 'servo motor' would normally mean an industrial motor with closed-loop control:
If by '...
- 632
2
votes
Accepted
Looking for dropping servo mechanism idea
Instead of a Servo, this could be very easily be done by the combination of a spring and a linear magnetic actuator. The downside is, that the setup needs a minimum weight of the item to overcome the ...
- 179
2
votes
Looking for dropping servo mechanism idea
If you look at some common vending machines (I'm talking about the ones that hold snacks), They dont use a servo. Instead they have a motor turn a screw/coil continuously until the purchased item ...
- 1,304
2
votes
What would be the best mechanism to rotate a plate from 0 to 15 degrees?
I'd personally go with Magnetic actuators, as those are highly reliable and can flip between their states extremely fast. As they are providing linear motion in a rather short range, you would need ...
- 179
2
votes
Sizing an AC Servo Motor for lifting pallets
Is the power calculation same when I have a Rack and Pinion or a Lead Screw?
Yes and no. Either power calculation needs to take the efficiency of the gearing into account, but you can pretty much ...
- 2,472
2
votes
Does a motor suffer damage when resistance to the intended motion is met?
There can be another case: if the motor is expected to stall time to time or experience an overload condition as a part of its routine, motor shaft can be equipped with a ball detent torque limiter ...
- 121
2
votes
Torque for servos of tiltrotors
If I understood you correctly, you want to basically place the propeller at the end of a stick and tilt the propeller disc with a servo at the other end of the stick. But all the equations for the ...
- 5,237
2
votes
PC based real time control system
A PC is less than ideal for real-time work, though it does depend on how fast a response-time you need.
Your elderly 486 system might have been a pure MS-DOS system with no multitasking, or an early ...
- 451
1
vote
How to convert a DC motor into a servo motor using a rotary encoder and a microcontroller?
Adding to the other answers. I just so happen to have done exactly this. I used a windshield wiper motor and a potentiometer but the principal is the same.
Here's my arduino source code: https://...
- 1,901
1
vote
How to convert a DC motor into a servo motor using a rotary encoder and a microcontroller?
You are at the right track. As the DC motor is rather fast for a potential slow microcontroller, using a discrete controller will improve the reliability and stability of the closed-loop system. Even ...
- 1,069
1
vote
Determining the torque needed for a servo motor
Welcome to Engineering. Without meaning to scare you, I am afraid there are a lot of unknowns here. For example, are you going to a) support the stake from both sides or is it going to be a cantilever....
- 24.3k
1
vote
Type 2 servo velocity tracking
Integrators is just a fancy way of saying you want to check your results. A type 0 system simply does not check the result at all. A type 1 system is reading the position directly from the shaft for ...
- 3,597
1
vote
Does a motor suffer damage when resistance to the intended motion is met?
The fan starts to act like a resistor and soon will heat excessively, till the breaker cuts the power off.
Almost all of the electrical motors have built-in fuses and breakers which will act to ...
- 22.1k
1
vote
Accepted
Reduce 180 degree rotation to 90 degree rotation without gears
If space is tight and complexity must be minimized, why not just buy a servo that has 90 degree travel to begin with. There are a number of these available for cheap.
- 2,646
1
vote
How to prevent movement in this 3 DOF setup?
If I understand your design correctly you extend the existing play in the mechanism.
If you can’t eliminate the play then you can try to minimise it.
See the locking pliers (https://en.wikipedia.org/...
Only top scored, non community-wiki answers of a minimum length are eligible