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Questions tagged [servo]

Servo is a tag used when referring to servo motors, electric motors capable of being programmed to turn in a desired way

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Does a motor suffer damage when resistance to the intended motion is met?

I'd like to create something similar to a hydraulic press. I know I need some sort of motor, but I was curious about a fundamental question about motors when used in a system where the force required ...
whatwhatwhat's user avatar
4 votes
0 answers
2k views

How to calculate the coupler length in a crank rocker mechanism

I'm trying to learn a bit about building kinematic mechanisms by building a small project. The goal is to be able to open and close a box programmatically via a servo motor. I have a small box that ...
Chris Schmitz's user avatar
3 votes
1 answer
3k views

Quick release for spring-loaded rod

I have some doubts about a quick-release mechanism that I'm working on and I'd like to run it by you. I have hollow tube in which there's a spring-loaded rod. Part of it is made wider and there's a ...
John Lane's user avatar
  • 209
3 votes
1 answer
294 views

Why servomotor has such low torque compared with stepper motors?

It is easy to found stepper motors with torque over 2NM for a few coins, however, only expensive industrial servomotors achieve this torque. Examples: Stepper motor: 10usd for 1.3nm with 2.8V at 3....
Adrian Maire's user avatar
3 votes
2 answers
112 views

Improving ball feeder design

I designed this ball feeder for my robot however I'm experiencing frequent ball jams as the ball is stuck against the wall of the hole entry or just a ball being moved left and right not entering the. ...
Sterling Duchess's user avatar
3 votes
3 answers
3k views

Is a 1:1 Worm Drive possible?

I am working on a project that requires a wing to be rotated and I need the rotation mechanism to be fail-safe -- if power fails, the wing will stay in place and not move around. My thought was to ...
Tristan Semmelhack's user avatar
2 votes
1 answer
89 views

What filter is this?

I am implementing a second order filter. It simulates hydraulic servo on an airplane. Its about 35-40 years old. What confuses me is the notation. Like "2(.7)(52)S", what does it mean? If its just ...
Invariant's user avatar
  • 163
2 votes
3 answers
504 views

How to convert a DC motor into a servo motor using a rotary encoder and a microcontroller?

Operating/ Rated Voltage: 24V No load Speed: 350 rpm No load Current: 150mA (max) Max efficiency: 1.4 Kg-cm/300 rpm/ 14.2W/ 0.87A Max power: 4.5 Kg-cm/180 rpm/28.2W/1.4A Stall Current: 2.9 A (max) ...
Samm Flynn's user avatar
2 votes
1 answer
11k views

How to I design a planetary gear with a gear ratio of 2:1 ( doubling the torque) [closed]

Trying to design a 2:1 gear ratio planetary gear, and I'm not sure how to begin. In the past I've had luck using this site to create an illustrator file that I can extrude in Rhino. This does not ...
user379468's user avatar
2 votes
2 answers
50 views

Looking for data or nomenclature that partains to "Smoothness/accuracy" of servo grade gearboxs for roll to roll application

I am designing a roll to roll web drive system where having smooth consistent very slow speed is important to quality of the product. I will be using a clearpath servo motor with a gearbox of 20:1 ...
Jacob S's user avatar
  • 21
2 votes
1 answer
126 views

Determining the torque needed for a servo motor

I'm looking for a bit of clarity on a design I have in mind. Please bear with me as I have no background in physics, engineering and this is part of my first real DIY project, so the knowledge base ...
Kieran S's user avatar
2 votes
1 answer
72 views

How to prevent movement in this 3 DOF setup?

I have a 3DOF platform that I'm trying to make more stable. It's difficult to explain in words what the issue is so I've added a GIF below. Any ideas of how I can get rid of this wobble? The DOF arm ...
shekit's user avatar
  • 121
2 votes
1 answer
309 views

How to center the potentiometer of a 9g micro servo without using a servo tester?

I am trying to modify a micro servo for continuous rotation, but I am not sure how to center the servo's potentiometer without having to use a servo tester. The micro servo that I am using is "SG90 ...
user avatar
2 votes
2 answers
165 views

how much power is needed to move a linear axis

Ι need help calculating the power usage for a linear axis motor. it must move up and down at a maximum speed of 0.5 m/s a load of 50 kg What I did so far: The load (i.e. weight) acting on the motor ...
tt600's user avatar
  • 23
2 votes
1 answer
52 views

Linear guide ball bearings

I'm planning to drive a small linear guide (4cm long) with a servo in a setup like this: I wonder if the ball bearings inside would sustain too much stress due to the vertical forces exerted by the ...
John M.'s user avatar
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2 votes
0 answers
63 views

Gearbox oil/grease leakage

Recently I encountered a problem of oil leakage from different driving systems SERVO gearboxes. The transmitted mechanical power ranges from 2 to 8 kW, while the motor speed (the gearbox input speed) ...
Yaniv Ben David's user avatar
2 votes
0 answers
475 views

Angular Velocity of motor shaft as function of Angular Position

I have a set of shafts that need to be rotated at a high frequency (~1000 RPM) but not at a constant speed. That is to say, the angular velocity of the shaft needs to be a periodic function of the ...
plam's user avatar
  • 21
2 votes
0 answers
49 views

Servo drive gear placement relative to the body

Is there a universal rule for servo drive gear placement? I'm planning to use this servo for a robotics project, but I need to know exactly where the drive gear is located relative to the body. The ...
CoilKid's user avatar
  • 121
1 vote
1 answer
3k views

Calculating force transferred from pinion gear to rack

I am really challenged as I need to fit a bunch of motors in a 6" box acting as linear actuators. I was looking for linear actuators (most I found were brushed DC) at first but the ones I found that ...
JCSB's user avatar
  • 177
1 vote
1 answer
401 views

Does the strength of a servo motor depend on the motor or the power?

I am making a life-size robotic dog, and i am having trouble with getting it to walk as it is too heavy for my 4 micro sg servos. Can i make the servos more powerful with more power? If not i can just ...
crvcio's user avatar
  • 115
1 vote
1 answer
122 views

What would be the best mechanism to rotate a plate from 0 to 15 degrees?

I'm designing a machine in a small university project that change position of a two-state gate. The two states shown in the Figure below are 0 and 17 degrees of elevation, correspondingly. The ...
Pablo Díaz's user avatar
1 vote
1 answer
134 views

Industrial (Farming) high precision gps tracking solution [closed]

Context: I am a hobbyist and I don't have experience with industrial solutions I am starting to prototype a farming equipment gps guiding system and I was looking fore some feedback regarding my ...
FlatSpeed's user avatar
1 vote
1 answer
33 views

Suppliers who write dynamical specification inside their data sheet?

I am a beginner in control system for hydraulic servo systems. The reason why I haven't started yet to do simulations of hydraulic servo system is because I have no information about the components I ...
euraad's user avatar
  • 113
1 vote
1 answer
79 views

How can I build a electronically controlled valve for a 1/4 inch tube

I'm looking for a practical efficient way to open and close a 1/4 inch gravity fed hose. Initially I was thinking of using a Solenoid, but can't find anything suitable. My second thought was using a ...
user379468's user avatar
1 vote
1 answer
97 views

Acceleration of servo motor with AASD-30A

I am using a servo motor 130st-M15015LB with the AASD-30A driver. I have to use the acceleration with position control mode. I can see in the documentation that If I use Pn110 to Pn112, I can have a ...
Leonardo Rafael Mora's user avatar
1 vote
0 answers
67 views

Servo Motor Input Voltage Equation

I'm working on a Ball & Beam project. As I'm doing it for an engineering project, I'm supposed to model the system mathematically, calculate the PID parameters, etc. to center the ball in the ...
Zelreedy's user avatar
1 vote
0 answers
84 views

How can you convert 180 rotation into two separate motions?

I have a small servo that can rotate 180 degrees. I would like to get two different connected parts to move at different times, one part moving while the servo is between 0-90 degrees, the other part ...
Dr. Cyanide's user avatar
1 vote
0 answers
174 views

Is it possible to have the load cell signal as feedback to the servo drive of the servo motor?

In my project, I have to control the linear motion in one of the two modes. It will be either in position control or load control. for the displacement control, The servo motor takes the quadrature ...
Aayvu.com's user avatar
  • 163
1 vote
0 answers
126 views

Need bevel gear for SG90 servo motor

I am looking for a away I can convert the horizontal rotation into vertical, typically we use bevel gear for such thing. But I am using a SG90 servo motor for which I am struggling to get the correct ...
uday8486's user avatar
  • 111
1 vote
1 answer
56 views

Waterproof Pan control/bearing/mechanism

Please bear with me - I'm not an engineer, I'm a software developer so lack the language / knowledge to describe what I want precisely. I'm controlling a servo to rotate /pan a platform to hold a ...
Jack's user avatar
  • 111
1 vote
0 answers
32 views

Creating torsion for a small robot arm

i am trying to make a small, simple 3d printed robot with humanoid characteristics. i am working on its arm at the moment. it is being driven by a small sg90 servo motor which pulls the forearm about ...
user2105725's user avatar
0 votes
3 answers
3k views

How to calculate the moment of inertia of a propeller

I am trying to design a VTOL system that uses a servo to rotate a propeller and the attached motor so that it can provide thrust when it is at 0 degree and lift when it is at 90 degree. However, I ...
Faito Dayo's user avatar
0 votes
2 answers
353 views

Torque for servos of tiltrotors

I am sourcing a servo for a tiltrotor drone and need to calculate the required torque to rotate the propeller and the motor from facing the front to facing the top. I understand that the minimum ...
Faito Dayo's user avatar
0 votes
2 answers
44 views

Two 3/4HP / 500W motors to run in opposite directions, at precisely the same RPM, controllable from zero to 5000 RPM?

I am designing a machine where I need two 3/4HP / 500W motors powered from 110VAC to run in opposite directions, at precisely (+/- 0.3% perhaps) the same RPM, controllable from zero to 5000 RPM by a ...
Jonathan Brickman of Topeka KS's user avatar
0 votes
2 answers
182 views

Looking for dropping servo mechanism idea

My friend and I have an idea to make prototype of vending machine. We need suggestions for making strong dropping mechanism. The idea is: The user orders X item. Let's take a can of cola for example. ...
Simeon Baltadziev's user avatar
0 votes
1 answer
4k views

What is a 10 turn potentiometer

I'm trying to figure out how to construct a CNC XY table, ala this instructable: https://www.instructables.com/id/Low-Cost-Hobby-Servo-XY-Table/#discuss I'm a noob with mechanical design/mechanical ...
bgenchel's user avatar
  • 103
0 votes
2 answers
46 views

PC based real time control system

I am newbie, and I want to update an existing control system, which works with a 486 PC with AD/DA card currently. Is it a good idea to find a solution with a windows 10 PC, and a USB AD/DA card? The ...
Kristóf Németh's user avatar
0 votes
1 answer
54 views

How do AC servos have constant torque region?

I have been learning about AC servos for a project. As i look through the torque speed curves, I get stuck. I understand how to use them, but I am baffled by the shape. I was always taught that there ...
DanielPatrick's user avatar
0 votes
2 answers
464 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 ...
Arsalan Ahmed's user avatar
0 votes
1 answer
147 views

Wire type for robotic tendon?

I'm working on a small project where an armature is actuated by a servo via a couple feet of tendon. The servo+tendon needs to be able to pull about 5-10 lbs. There will be springs at the endpoints to ...
Cerin's user avatar
  • 121
0 votes
1 answer
58 views

Digital servo for my robot arm?

I'm planning on using this servo for my robotic arm project: Amazon link. It's a digital servo with 35 kg-cm (3.4 Nm) torque. However, when looking at other robotic arm projects, I've mainly seen ...
user36991's user avatar
0 votes
1 answer
376 views

Reduce 180 degree rotation to 90 degree rotation without gears

I am actuating a small ceramic rotary valve with a cheap mg996 servo motor. The valve has a 90 degree max rotation from fully closed to fully open. Currently I have the servo shaft directly coupled to ...
Ryan Griggs's user avatar
0 votes
3 answers
85 views

precision positional control needed for shifting position of lenses

Looking for a way to shift a 30mm lens in two axis perpendicular to another lens. The lens is for shifting a video projection up, down, left, right. Basically what you will find in tilt-shift camera ...
Mark Legault's user avatar
0 votes
1 answer
157 views

Type 2 servo velocity tracking

As I understand from theory that two integrators are required to provide zero velocity lag in a type 2 servo system. My question is how does 2 integerators help to nullify velocity errors. Less of ...
Vishnu's user avatar
  • 11
0 votes
0 answers
18 views

What does the resonance frequency mean in inertia matching

Like Kollmorgen shows in this PDF how you can calculate the resonance frequency of a motor coupled to a load. But with what can I Compare this frequency? It is clear that a higher resonance frequency ...
fpl's user avatar
  • 1
0 votes
0 answers
15 views

Function blocks used in MD drive cannot be used in AD drive

I program Schneider PLC and Machine Expert program Normally I was using Schneider's SD or MD type drivers but now I need to do this program with AD driver but my function blocks are not working. For ...
Büşra Fatma SUSUZ's user avatar
0 votes
0 answers
37 views

Help Designing an Electric Wheel Hoe: Identifying Required Materials and Torque Control Mechanisms

I am currently working on designing an electric wheel hoe, and I need help determining the required materials for its construction. The goal of this project is to create an automated version of a ...
A guy with questions's user avatar
0 votes
0 answers
35 views

Temporary upgrade of IP67 servo motor to IP69K

I have this IP67 rated servo motor and I would like to test it on a device, which undergoes IP69K washdown (once daily high-pressure, hot jet with cleaning agents used in food processing plants). The ...
Paul Jurczak's user avatar
0 votes
1 answer
111 views

How can I open a door? There's gotta be something simpler!

I'm trying to open a door. More precisely, I'm trying to design a mechanism to open and close a door mechanically which also allows me to open the door manually. Now, I thought this would be fairly ...
artaxerxes131's user avatar
0 votes
1 answer
91 views

Is there a special wrench used to remove this servo tachometer?

I tried using a pulley puller with moderate force to remove the tachometer but it didn’t seem so budge (although I didn’t use heat to soften potential adhesive inside). Looking at the shaft I can see ...
user391339's user avatar