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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1answer
33 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 ...
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2answers
60 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. ...
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1answer
44 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 ...
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1answer
52 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 ...
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0answers
37 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 ...
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1answer
28 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 ...
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1answer
22 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 ...
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0answers
43 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 ...
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2answers
66 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 ...
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6answers
3k views

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 ...
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0answers
168 views

How to obtain transfer function of servo?

I am using a servo motor and controlling it via arduino. Servo motor is part of a control system and I have to use System Identification techniques in order to obtain the servo's transfer function. ...
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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 ...
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41 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 ...
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1answer
43 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 ...
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1answer
140 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 ...
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0answers
945 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 ...
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0answers
53 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) ...
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0answers
46 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 ...
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3answers
852 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 ...
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1answer
2k 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 ...
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1answer
80 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 ...
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0answers
27 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 ...
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1answer
30 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 ...
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3answers
73 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 ...
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1answer
449 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 ...
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1answer
86 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 ...
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1answer
117 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 ...
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1answer
135 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....
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1answer
178 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 ...
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0answers
390 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 ...
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0answers
45 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 ...
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1answer
9k 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 ...
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1answer
63 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 ...