# 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

20 questions with no upvoted or accepted answers
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### 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 ...
131 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 ...
• 23
62 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) ...
471 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 ...
• 21
48 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 ...
• 121
1 vote
61 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 ...
• 43
1 vote
81 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 ...
• 119
1 vote
160 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 ...
• 163
1 vote
108 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 ...
• 111
1 vote
31 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 ...
• 121
29 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 ...
• 155
72 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 ...
76 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 ...
• 253
11 views

### How to use a high current 2 Second current pulse to actuate a servo - First year Electrical Engineer

I am using a dual deployment system controller, an Eggtimer Quark REVC2 which at apogee outputs a high current 2 second pulse. I don't have time to buy a more advanced Eggtimer which outputs proper ...
74 views

### Flopping toy mechanism design

I've bought a flopping toy for my kid. The toy looks like: Unfortunately, the toy mechanism inside jams when grabbed and the battery lasts for a short time: I tried to do my own mechanism, printing ...
• 1
30 views

### Determining time and distance constrained S-curve motion profile

I am attempting to determine (symbolically) the required motion profile for a servo-driven system given three critical parameters: dx - The total displacement of the target material T - The time in ...
138 views

### How to make a circle spin from the edges

I have an issue where I need to make a large wire through a bearing spin in 3" diameter circles, and have a weight hanging from the bottom of the wire. Essentially, I need a hole that moves in a ...
63 views

### Force in a string attached tangential to a servo

If I'm using a servo with a string attached to it (while the string is attached to another object) the string is attached tangentially at about 1.5cm from the centre of the servo and the servo draws ...
567 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. ...
• 1,019
66 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 ...